Parallel Wire Type Patents (Class 331/99)
  • Patent number: 8791765
    Abstract: A Force-Mode Distributed Wave Oscillator (FMDWO) that provides accurate multiple phases of an oscillation, a Force Mode Distributed Wave Antenna as a radiating element, a Force-Mode Distributed Oscillator Amplifier (FMDOA) and an array of amplifiers capable of operating as a beam forming phased-array antenna driver. Two distinct force mode mechanisms, one delay-based and the other geometry-based, utilizing inverter amplifiers, inject an oscillation on independent conductor loops or rings via transmission lines forming a differential transmission medium for the oscillation wave. Once the oscillation wave is initiated through the forcing mechanisms, the oscillations continue uninterrupted independent of any external triggering.
    Type: Grant
    Filed: December 31, 2010
    Date of Patent: July 29, 2014
    Assignee: Waveworks, Inc.
    Inventors: Ahmed Emira, Ahmet Tekin, Damir Ismailov, Suat Utku Ay
  • Patent number: 8742857
    Abstract: A plurality of inductance enhanced interweaved rotary traveling wave oscillators (RTWO) is disclosed. Portions of the transmission line conductors are increased in length and run in parallel. Because the currents in these portions travel in the same direction, the inductance of these inductors is increased. By controlling the length of the transmission line conductors in these areas compared to the lengths where the currents in the oscillators travel in opposite directions, the overall impedance of the oscillators can be increased. Increased impedance leads to lower power and lower phase noise for the oscillators. Additionally, the interweaved oscillators are phase-locked to each other.
    Type: Grant
    Filed: December 31, 2011
    Date of Patent: June 3, 2014
    Assignee: Analog Devices, Inc.
    Inventors: Andrey Martchovsky, Stephen Beccue, Anh Pham
  • Patent number: 8242855
    Abstract: An integrated power combiner is disclosed. The power combiner includes a first circular geometry primary winding having one or more inductive elements, such as an active winding with one or more driver stages. A circular geometry secondary winding is disposed adjacent to the first primary winding, such as an active winding with one or more driver stages. A second circular geometry primary winding is disposed adjacent to the secondary winding and has one or more inductive elements. One or more connections are provided between one or more of the inductive elements of the first circular geometry primary winding and one or more of the inductive elements of the second circular geometry primary winding.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: August 14, 2012
    Assignee: Axiom Microdevices, Inc.
    Inventors: Scott D. Kee, Ichiro Aoki, Hui Wu, Seyed-Ali Hajimiri, Frank Carr, Rahul Magoon, Alexander Kral, Afshin Mellati, Florian Bohn, Donald McClymont
  • Patent number: 8193870
    Abstract: The present invention is a method and system for compensation of frequency pulling in an all digital phase lock loop. The all digital phase lock loop can utilize a multi-phase oscillator including latches with substantially all of the latches paired with a corresponding dummy cell. The dummy cells can have impedance characteristics, such as variable capacitance values which correspond to the variable capacitance value of the latches such that the sum of the two variable capacitance values remains substantially constant, even when the polarity of the reference clock signal changes. The dummy cells can be, for example, variable capacitors or dummy latches. The phase lock loop can also include a multiplying unit. The multiplying unit can receive a reference clock signal and generate a frequency multiplied reference clock signal.
    Type: Grant
    Filed: July 19, 2010
    Date of Patent: June 5, 2012
    Assignee: Panasonic Corporation
    Inventors: Koji Takinami, Richard Strandberg, Paul Cheng-Po Liang
  • Patent number: 8164401
    Abstract: Tuning devices and methods are disclosed. One of the devices comprises a metal structure connected with artificial dielectric elements, and variable capacitance devices. Each variable capacitance device is connected with a respective artificial dielectric element and with a control signal. Control of the variation of the capacitance allows the desired tuning. Another device comprises metallic structures connected with artificial dielectric elements and switches connected between the artificial dielectric elements. Turning ON and OFF the switches allows the capacitance between artificial dielectric elements to be varied and a signal guided by the metallic structures to be tuned.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: April 24, 2012
    Assignee: The Regents of the University of California
    Inventors: Mau-Chung Frank Chang, Daquan Huang, William Hant
  • Patent number: 8149066
    Abstract: An integrated circuit distributed radio frequency oscillator comprises a semiconductor chip which includes a differential input transmission line, a differential output transmission line and, coupled in parallel between these transmission lines at spaced apart portions, a number of differential amplifier cells with adjustable delay. The output end of the output transmission line is coupled back to the input end of the input transmission line by a feedback link with a pair of on-chip capacitors. The delay introduced by the amplifier cells is variable in response to a tuning voltage applied to a differential tuning input, making the oscillator suitable for use as a distributed VCO in, e.g. a phase-locked loop circuit. The layout of the oscillator on a semiconductor chip includes the series-connected arrangement of the differential transmission lines in a rectilinear spiral path.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: April 3, 2012
    Assignee: Analogies, Inc.
    Inventors: George P. Bilionis, Alexios N. Birbas, Michael K. Birbas, John C. Kikidis
  • Patent number: 8134421
    Abstract: A voltage control oscillator includes: first and second field effect transistors, a drain of one of which is connected to a gate of the other and a drain of the other of which is connected to a gate of the one; third and fourth field effect transistors, a drain of one of which is connected to a gate of the other and a drain of the other of which is connected to a gate of the one; a first inductor connected between the drain of the first field effect transistor and the drain of the second field effect transistor; a second inductor connected between the drain of the third field effect transistor and the drain of the fourth field effect transistor; a third inductor magnetically coupled to the first inductor; a fourth inductor magnetically coupled to the second inductor; a first capacitor that capacitively couples one end of the third inductor and one end of the fourth inductor; and a second capacitor that capacitively couples the other end of the third inductor and the other end of the fourth inductor.
    Type: Grant
    Filed: May 19, 2010
    Date of Patent: March 13, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kenichi Hirashiki, Shinichiro Ishizuka, Nobuyuki Itoh
  • Patent number: 8089322
    Abstract: An inductance enhanced rotary traveling wave oscillator is disclosed. Portions of the transmission line conductors are increased in length and run in parallel. Because the currents in these portions travel in the same direction, the inductance of these inductors is increased. By controlling the length of the transmission line conductors in these areas compared to the lengths in which the currents travel in opposite directions, the overall impedance of the oscillator can be increased. Increased impedance leads to lower power, higher Q, and lower phase noise for the oscillator. Additionally, the folded nature of the transmission line conductors permits a longer length of transmission line conductors to be routed in a smaller area. The folded nature also permits placement of the devices to take into account their switching delays. A folded circular version of the oscillator is possible, leading to improved access to phase taps on the oscillator.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: January 3, 2012
    Inventors: Stephen M Beccue, Anh D Pham
  • Patent number: 8018290
    Abstract: An output terminal 6 is provided at the connecting point 5 between the collector terminal of a transistor 1 and an open-ended stub 4 by connecting the open-ended stub 4 to the collector terminal of the transistor 1, the open-ended stub 4 having a line length equal to a quarter of the wavelength of a signal of frequency 2N·F0 or 2N times the oscillation frequency F0. In addition, an output terminal 9 is provided at a connecting point 8 located at a distance equal to a quarter of the wavelength of a signal of oscillation frequency F0 from the end of an open-ended stub 7 by connecting the open-ended stub 7 to the base terminal of the transistor 1, the open-ended stub 7 having a line length longer than a quarter of the wavelength of the signal of oscillation frequency F0.
    Type: Grant
    Filed: October 15, 2007
    Date of Patent: September 13, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroyuki Mizutani, Kazuhiro Nishida, Masaomi Tsuru, Kenji Kawakami, Morishige Hieda, Moriyasu Miyazaki
  • Patent number: 7949126
    Abstract: A bipolar pulse forming transmission line module and system for linear induction accelerators having first, second, third, and fourth planar conductors which form a sequentially arranged interleaved stack having opposing first and second ends, with dielectric layers between the conductors. The first and second planar conductors are connected to each other at the first end, and the first and fourth planar conductors are connected to each other at the second end via a shorting plate. The third planar conductor is electrically connectable to a high voltage source, and an internal switch functions to short at the first end a high voltage from the third planar conductor to the fourth planar conductor to produce a bipolar pulse at the acceleration axis with a zero net time integral. Improved access to the switch is enabled by an aperture through the shorting plate and the proximity of the aperture to the switch.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: May 24, 2011
    Assignee: Lawrence Livermore National Security, LLC
    Inventor: Mark A. Rhodes
  • Patent number: 7852176
    Abstract: Tuning devices and methods are disclosed. One of the devices comprises a metal structure connected with artificial dielectric elements, and variable capacitance devices. Each variable capacitance device is connected with a respective artificial dielectric element and with a control signal. Control of the variation of the capacitance allows the desired tuning. Another device comprises metallic structures connected with artificial dielectric elements and switches connected between the artificial dielectric elements. Turning ON and OFF the switches allows the capacitance between artificial dielectric elements to be varied and a signal guided by the metallic structures to be tuned.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: December 14, 2010
    Assignee: The Regents of the University of California
    Inventors: Mau-Chung Frank Chang, Daquan Huang, William Hant
  • Patent number: 7741921
    Abstract: A Trigger-Mode Distributed Wave Oscillator that provides accurate multiple phases of an oscillation and a method of use of the same. An auxiliary oscillator triggers an oscillation on independent conductor loops or rings forming a differential transmission medium for the oscillation wave. Once the oscillation wave is triggered, the auxiliary oscillator can be powered down to turn it off, and the wave can sustain itself indefinitely through active amplifying devices which can compensate for losses in the conductors.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: June 22, 2010
    Assignee: Waveworks, Inc.
    Inventor: Damir Ismailov
  • Publication number: 20090072916
    Abstract: An integrated circuit distributed radio frequency oscillator comprises a semiconductor chip which includes a differential input transmission line, a differential output transmission line and, coupled in parallel between these transmission lines at spaced apart portions, a number of differential amplifier cells with adjustable delay. The output end of the output transmission line is coupled back to the input end of the input transmission line by a feedback link with a pair of on-chip capacitors. The delay introduced by the amplifier cells is variable in response to a tuning voltage applied to a differential tuning input, making the oscillator suitable for use as a distributed VCO in, e.g. a phase-locked loop circuit. The layout of the oscillator on a semiconductor chip includes the series-connected arrangement of the differential transmission lines in a rectilinear spiral path.
    Type: Application
    Filed: December 26, 2007
    Publication date: March 19, 2009
    Inventors: George P. Bilionis, Alexios N. Birbas, Michael K. Birbas, John C. Kikidis
  • Patent number: 7274262
    Abstract: A standing wave oscillator to generate at least one voltage standing wave, comprising a closed-loop coplanar stripline including two conductors, and at least one amplifier disposed between the two conductors at a first location. The two conductors are connected together at a second location different from the first location to provide a zero voltage node for the at least one voltage standing wave. One or more of a tailored distributed amplification scheme, a plurality of linear conductive strips disposed in proximity to the coplanar stripline, and a tapered coplanar stripline configuration may be used with the closed loop structure. A particular amplifier configuration involving cross-coupling of the coplanar stripline conductors may be employed to facilitate single mode operation, using a particular resonator topology so as to avoid inducing significant loss in the oscillator.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: September 25, 2007
    Assignee: Presidents and Fellows of Harvard College
    Inventors: Donhee Ham, William Franklin Andress, Yong Liu
  • Patent number: 7218180
    Abstract: A low noise oscillator constructed using a rotary traveling wave oscillator. The conductors of the rotary traveling wave oscillator provide at any tap position a pair of oppositely phased oscillations and these oscillations have slightly different phases at positions that are slightly different on the conductors. Regeneration devices establish and maintain oscillations on the conductors of the traveling wave oscillator. A regeneration device made from p-channel and n-channel transistors is connected to the conductors of the traveling wave oscillator in such a way that the gate connections of the transistors receive the traveling wavefront before the drains of the transistors receive the wavefront. By the time the regeneration device switches in response to the wavefront arriving at the gates of the transistors, the wavefront has arrived at the drains. This creates little or no disturbance to the wave on the conductors and results in low phase noise.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: May 15, 2007
    Assignee: Multigig, Ltd.
    Inventor: John Wood
  • Patent number: 7091802
    Abstract: Methods and apparatus for implementing standing wave oscillators (SWOS) using coplanar striplines (CPS). One example is given by a quarter-wavelength (?/4) coplanar stripline standing wave oscillator (SWO), while another implementation utilizes a closed-loop coplanar stripline configuration. In various aspects, SWOs are configured to optimize sinusoidal performance at high frequencies with low power dissipation by incorporating various features that dramatically increase the quality factor Q of the oscillator. In particular, in one aspect, an amplitude-dependent tailored distributed amplification scheme is employed as a mode control technique using multiple amplifiers having different gains along the length of the coplanar stripline. In another aspect, a coplanar stripline configured such that its resistance per unit length R and conductance per unit length G are discreet or continuous functions of position along the coplanar stripline is employed to reduce SWO losses.
    Type: Grant
    Filed: July 19, 2004
    Date of Patent: August 15, 2006
    Assignee: President and Fellows of Harvard College
    Inventors: Donhee Ham, William Franklin Andress, Yong Liu
  • Patent number: 7068115
    Abstract: A feedback oscillator device formed with an integrated circuit having a semiconductor material substrate on a ground plane. The circuit has an amplifier having an input and an output is provided at least in part on said semiconductor material substrate. A directional coupler is used to couple the amplifier output signal to the amplifier input through a parallel separated transmission lines transfer system and a capacitor such as a varactor. The substrate can be of gallium arsenide.
    Type: Grant
    Filed: September 15, 2003
    Date of Patent: June 27, 2006
    Assignee: TLC Precision Wafer Technology, Inc.
    Inventors: Zahilya Austin, Timothy T. Childs, Sasidhar Vajha
  • Patent number: 7061336
    Abstract: A high frequency oscillator which obtains an oscillation output by combining the outputs of two oscillators has a substrate, first and second amplifiers for oscillation so disposed that their output ends be opposite each other, first and second signal lines each configuring a closed oscillation loop by connecting the input ends and the output ends of the first and second amplifiers, respectively, these being disposed on a first principal surface of the substrate, and a grounding conductor disposed on a second principal surface of the substrate and configuring a strip line together with each of the signal lines. An opening, where the grounding conductor is removed, is bored in the second principal surface and a coplanar line structure is configured by arranging the first and second signal lines close to each other in the area of the opening.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: June 13, 2006
    Assignee: Nihon Dempa Kogyo Co., Ltd.
    Inventors: Fumio Asamura, Takeo Oita
  • Patent number: 6949811
    Abstract: A device includes a transistor, and two interdigital capacitors. The transistor is located on an imaginary extension line aligned with a common electrode of the two interdigital capacitors.
    Type: Grant
    Filed: March 26, 2003
    Date of Patent: September 27, 2005
    Assignee: Fujitsu Quantum Devices Limited
    Inventor: Naoyuki Miyazawa
  • Patent number: 6853260
    Abstract: A voltage controlled oscillator is provided. The voltage controlled oscillator includes a differential transmission line and another transmission line, which can include a second differential transmission line or other suitable transmission lines. An active device connected to the differential transmission line and the other transmission line controls the current flow between the two transmission lines. A tuning circuit connected to the active device, such as a bias voltage, controls an oscillation frequency of a signal on the differential transmission line and the other transmission line, such as by controlling the level of current flow.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: February 8, 2005
    Assignee: California Institute of Technology
    Inventors: Seyed-Ali Hajimiri, Hui Wu
  • Publication number: 20040239453
    Abstract: In a high-frequency circuit having a substrate having a high-frequency transmission line and an dielectric resonator formed on said substrate so that said dielectric resonator and said high-frequency transmission line may be coupled electro-magnetically to each other, a hole part or a cavity part is formed at a part of said substrate and a dielectric resonator is embedded in said hole part or said cavity part. In the same object, a high-frequency circuit having a dielectric resonator is produced by the step for forming a high-frequency transmission line on a substrate, the step for forming a hole part or a cavity part on a part of the substrate, and the step for mounting a dielectric resonator in the hole par formed on the surface of the substrate.
    Type: Application
    Filed: June 21, 2004
    Publication date: December 2, 2004
    Applicant: Hitachi, Ltd.
    Inventor: Yoshiyuki Sasada
  • Patent number: 6771150
    Abstract: In a high-frequency circuit having a substrate having a high-frequency transmission line and an dielectric resonator formed on said substrate so that said dielectric resonator and said high-frequency transmission line may be coupled electro-magnetically to each other, a hole part or a cavity part is formed at a part of said substrate and a dielectric resonator is embedded in said hole part or said cavity part. In the same object, a high-frequency circuit having a dielectric resonator is produced by the step for forming a high-frequency transmission line on a substrate, the step for forming a hole part or a cavity part on a part of the substrate, and the step for mounting a dielectric resonator in the hole par formed on the surface of the substrate.
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: August 3, 2004
    Assignee: Hitachi, Ltd.
    Inventor: Yoshiyuki Sasada
  • Patent number: 6771139
    Abstract: The microwave pulse generator of the invention for generating microwave pulses with a pulse duration in the nanosecond range has a pulse generator that generates pulses of constant width, and a microwave resonant circuit for generating microwave oscillations. Additionally provided is a pulse-shortening stage, to which the pulses from the pulse generator are fed and which generates output pulses in the nanosecond range. The output pulses are fed as supply voltage pulses to a microwave oscillator, at the output of which the microwave pulses can be picked off. A voltage-controlled varicap diode arrangement is provided to influence the pulse lengths and/or pulse amplitudes.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: August 3, 2004
    Assignee: VEGA Grieshaber KG
    Inventors: Daniel Schultheiss, Winfried Rauer
  • Patent number: 6771137
    Abstract: A high-frequency oscillator includes: a substrate composed of a dielectric material; a first transmission line of coplanar structure which is arranged on one principal surface of the substrate; an amplifier having an input terminal and an output terminal and which is inserted into the first transmission line such that the input terminal and output terminal connect to the first transmission line; and a second transmission line which is provided on the other principal surface of the substrate, which electromagnetically couples with the first transmission line, and which constitutes a feedback circuit with respect to the amplifier. The first transmission line is typically a coplanar line of finite length, and the second transmission line is typically a microstrip line.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: August 3, 2004
    Assignee: Nihon Dempa Kogyo Co. Ltd
    Inventors: Masayoshi Aikawa, Takayuki Tanaka, Fumio Asamura, Kenji Kawahata, Takeo Oita
  • Patent number: 6714088
    Abstract: A low-phase noise oscillator with a microstrip resonator for generating a target signal with a predetermined frequency is provided. The resonator includes a first microstrip line and a second microstrip line. The first microstrip line is parallel with the second microstrip line without having any contact. A length of the first microstrip line equals a length of the second microstrip line, and the length equals a quarter wavelength of the target signal. When a plurality of oscillating signals is transmitted to the first microstrip line, one of the oscillating signals having the predetermined frequency will be output from the resonator by an electromagnetic coupling generated between the first microstrip line and the second microstrip line.
    Type: Grant
    Filed: October 1, 2002
    Date of Patent: March 30, 2004
    Assignee: Accton Technology Corporation
    Inventors: Sheng-Fuh Chang, Jia-Liang Chen, Shi-Wei Kuo
  • Patent number: 6714089
    Abstract: A high frequency signal source and method of generating a high frequency signal is disclosed. An output signal is generated from a dielectric resonator oscillator and mixed with an output signal from a voltage controlled oscillator having a predetermined tuning range and part of a phase locked loop circuit to sum the frequencies for creating a final output frequency. A portion of the final output frequency is coupled into the phase locked loop circuit that is phase locked to a reference signal from a crystal reference oscillator. The voltage controlled oscillator has a tuning range that is used to compensate for the dielectric resonator oscillator initial frequency error and drift over temperature and aging while the balance of the bandwidth is used to provide the tuning range on the local oscillator output.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: March 30, 2004
    Assignee: Xytrans, Inc.
    Inventors: Danny F. Ammar, Conrad Jordan
  • Patent number: 6559729
    Abstract: A miniaturized oscillator that is manufactured with greatly reduced production time and cost includes transmission lines defining resonance circuits provided on a circuit assembly board. In this state, the impedance of each transmission line is measured. Then, according to the transmission line impedance, chip components having impedances necessary to obtain a predetermined frequency are selected and mounted on the circuit substrate. With this arrangement and method of formation, the resulting oscillator oscillates at the desired oscillation frequency and it is not necessary to trim the transmission lines in order to achieve this result. Since the oscillator does not require time to make frequency adjustments and does require use of a trimming apparatus, no deterioration in the electric characteristics due to laser trimming occurs. In addition, it is unnecessary to provide an electrode land for making frequency adjustments. As a result, the entire oscillator is miniaturized.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: May 6, 2003
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Shinji Goma, Masao Uno
  • Patent number: 6552620
    Abstract: An oscillator includes a solid state active device having an input and an output, a feedback circuit connected from the output of the active device to the input of the active device, the feedback circuit providing suitable positive feedback to initiate and sustain an oscillating condition at a fundamental frequency, and a waveform modifying circuit connected to the output of the active device, wherein the waveform modifying circuit is adapted to modify the waveform on the output in a manner which increases an efficiency of the oscillator. For example, the waveform modifying circuit comprises transmission lines and optionally components which provide a high impedance for odd harmonics of the fundamental frequency. The waveform modifying circuit may further include transmission lines and optionally components which provide a low impedance for even harmonics of the fundamental frequency.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: April 22, 2003
    Assignee: Fusion Lighting, Inc.
    Inventors: Aleksandr Gitsevich, Douglas A. Kirkpatrick, Donald A. MacLennan
  • Patent number: 6535072
    Abstract: A voltage controlled oscillator, a voltage controlled oscillator device, and a radar device provided therewith which can detect when the oscillation frequency becomes uncontrollable. According to one embodiment, a Gunn or other oscillation device is connected to a main line and a varactor diode which is a variable reactance element is connected between the main line and a sub line to constitute a voltage controlled oscillator. A control voltage is applied to the varactor diode via a switching circuit, and the presence or absence of oscillation or a failure of the varactor diode or oscillation device is detected by a detection signal, for example, from the varactor diode as monitored by a voltage monitor, and/or from the oscillation device, as monitored by a current sensing device.
    Type: Grant
    Filed: July 17, 2001
    Date of Patent: March 18, 2003
    Assignee: Murata Manufacturing Co. Ltd.
    Inventors: Sadao Yamashita, Kazumasa Haruta
  • Patent number: 6525618
    Abstract: Electronic circuitry having two circuitry parts each having timing signal generating and distribution means using signal path provisions exhibiting endless electromagnetic continuity affording signal phase inversion with associated regenerative active means so as to serve as source of said timing signals, further comprises inter-connection between the signal path provisions of each of the circuitry parts over an electrical length and at positions of the signal path provisions to coordinate mutual frequency and phase coherence of the circuitry parts, and bidirectional data transfer means at each circuitry part further coordinated with the coordinated timing signals.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: February 25, 2003
    Assignee: Multigig Limited
    Inventor: John Wood
  • Patent number: 6512421
    Abstract: An oscillation circuit is constructed by providing a line and a Gunn diode on a dielectric substrate, and an oscillation signal as the fundamental frequency signal of an oscillator is injected into the Gunn diode through a DC bias line. By disposing a dielectric stripline between upper and lower conductor plates, at NRD guide as an output transmission line is constructed, and the line and the NRD guide are coupled. The cutoff frequency of the NRD guide is determined so that the fundamental wave component of oscillation signal of the oscillation circuit is cut off and a harmonic is propagated.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: January 28, 2003
    Assignee: Murata Manufacturing Co. Ltd
    Inventors: Kazumasa Haruta, Sadao Yamashita, Toru Tanizaki, Koichi Sakamoto
  • Patent number: 6504440
    Abstract: In a feedback type oscillation circuit including a first microstrip line connected to a signal input terminal of a transistor, a second microstrip line connected to a signal output terminal of the transistor, and a dielectric resonator coupled with the microstrip lines at high frequency, the first and second microstrip lines are provided with patterns that are branched off from the respective microstrip lines, each at an arbitrary angle.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: January 7, 2003
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hitoshi Nitta
  • Patent number: 6486744
    Abstract: A low phase noise voltage-controlled oscillator (VCO) and method are provided. The VCO comprises a negative resistance generator and a resonator that reduces VCO phase noise.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: November 26, 2002
    Assignee: Digital Microwave Corporation
    Inventor: Michael John Cann
  • Patent number: 6433646
    Abstract: In a microwave oscillation circuit using a dielectric resonator, a bias resistor for determining a bias voltage supplied to a base terminal of a transistor is located in the neighborhood of a connection point between a feedback circuit side stub for the dielectric resonator and the base terminal of the transistor. The bias resistor has a resistance which basically determines a bias voltage supplied to the base terminal of the transistor and which is enough to make high the impedance of a bias voltage supplying circuit including the bias resistor, viewed at the input terminal of the transistor. Thus, a stable oscillation can be maintained independently of variation in a load impedance.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: August 13, 2002
    Assignee: NEC Corporation
    Inventors: Yasushi Kose, Akihiro Ogisou
  • Publication number: 20020097100
    Abstract: A design methodology for a DRO that facilitates the development of the DRO. The methodology involves providing an electrical length of approximately 180 degrees or a multiple thereof from a region interior to a field effect transistor to a puck-resonator line interaction region, providing an electrical length of approximately 180 degrees or a multiple thereof from a region interior to the field effect transistor to the signal end of a source feedback transmission line, and providing an electrical length of approximately 90 degrees or an odd multiple thereof from a varactor diode signal ground to a puck-tuning line interaction region. Other aspects relate to a DRO resonator transmission line and a DRO tuning transmission line having a portion formed on a higher dielectric substrate to concentrate the electromagnetic field, and a portion on a lower dielectric substrate to expand the electromagnetic field near the dielectric resonator puck.
    Type: Application
    Filed: January 25, 2001
    Publication date: July 25, 2002
    Inventors: Donnie W. Woods, Charles D. Pitcher, Roy Baldarrama
  • Patent number: 6396359
    Abstract: Techniques and structures for tuning integrated, distributed voltage-controlled oscillators (DVCO's) across a wide microwave frequency range are disclosed. One type of DVCO implements a tuning circuit that includes a pair of interconnected amplifying transistors and a current source connected to the transistors, such that a differential voltage input to the circuit adjusts the current to each transistor and effectively adjusts the “electrical length” of one of the transmission lines on which the output frequency is oscillating. This, in turn, adjusts the time delay and thus frequency of the signal propagating on the lines across a wide frequency band. This technique is called “current-steering.” In a preferred embodiment, the tuning circuit is balanced with a complementary tuning circuit to effectively adjust the electrical length of the second transmission line in the oscillator.
    Type: Grant
    Filed: April 13, 2000
    Date of Patent: May 28, 2002
    Assignee: California Institute of Technology
    Inventors: Seyed-Ali Hajimiri, Hui Wu
  • Patent number: 6388535
    Abstract: A smaller oscillator module enables oscillation frequency to be adjusted from the back after assembly is finished. The oscillator has oscillator circuit components mounted on the front of a circuit board having an internal dielectric layer, a back conductor layer covering a major part of the back of the circuit board, and at least a part of an inductor element of the oscillator circuit disposed internally with a part of an intervening dielectric layer from the back conductor layer. A slit or pinhole is formed in the back conductor. The oscillation frequency can then be adjusted after assembly is completed by emitting a trimming laser through this slit or pinhole to change the inductance by partially removing the dielectric layer and inductor element.
    Type: Grant
    Filed: April 19, 2000
    Date of Patent: May 14, 2002
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Terukazu Otsuki, Masumi Nakamichi, Hiroshi Isoda, Masakazu Ikeda
  • Patent number: 6384691
    Abstract: A high frequency signal source module includes a housing have a high-Q dielectric puck and a transition enclosure employing an antipodal finline transition. A circuit module connected to the high-Q puck includes an oscillator circuit that cooperates with the high-Q puck, and a frequency doubling circuit. In turn, the output of the frequency doubler is coupled to the antipodal finline transition, and thence to the output standard rectangular waveguide.
    Type: Grant
    Filed: March 15, 2000
    Date of Patent: May 7, 2002
    Assignee: TLC Precision Wafer Technology, Inc.
    Inventor: Vladimir Sokolov
  • Publication number: 20020050865
    Abstract: An oscillator includes a solid state active device having an input and an output, a feedback circuit connected from the output of the active device to the input of the active device, the feedback circuit providing suitable positive feedback to initiate and sustain an oscillating condition at a fundamental frequency, and a waveform modifying circuit connected to the output of the active device, wherein the waveform modifying circuit is adapted to modify the waveform on the output in a manner which increases an efficiency of the oscillator. For example, the waveform modifying circuit comprises transmission lines and optionally components which provide a high impedance for odd harmonics of the fundamental frequency. The waveform modifying circuit may further include transmission lines and optionally components which provide a low impedance for even harmonics of the fundamental frequency.
    Type: Application
    Filed: September 12, 2001
    Publication date: May 2, 2002
    Inventors: Aleksandr Gitsevich, Douglas A. Kirkpatrick, Donald A. MacLennan
  • Patent number: 6380815
    Abstract: The invention relates to a microwave pulse generator for generating microwave pulses with a pulse duration in the nanosecond range. The microwave pulse generator includes a pulse generator for generating control pulses of a constant pulse duration and a microwave oscillator generating microwave oscillations. The microwave oscillator includes a transistor amplifier, to which a frequency-determining resonant circuit and an ohmic device for reducing the resonant Q-value are connected in such a way that a control pulse of the pulse generator applied to an input terminal of the transistor amplifier causes the microwave oscillator to produce a microwave oscillation that can be tapped at an output terminal of the microwave oscillator, wherein the microwave oscillation follows at least approximately the temporal course of the control pulse.
    Type: Grant
    Filed: November 2, 2000
    Date of Patent: April 30, 2002
    Assignee: Vega Grieshaber KG
    Inventors: Josef Fehrenbach, Gregor Storz, Daniel Schultheiss
  • Patent number: 6369662
    Abstract: An oscillator, a dielectric waveguide device and a transmitter incorporating the same, wherein a special temperature-compensating circuit provides a temperature-compensated device with reduced size and cost, and greater productivity. In the oscillator, a dielectric plate having a strip line of a specified length is arranged between conductive plates which enclose a Gunn diode. The oscillation output signal of the Gunn diode is extracted via the strip line. In addition, the sign of the dielectric-constant temperature coefficient of the dielectric plate is set such that changes in the oscillation frequency caused by changes in temperature of the Gunn diode are suppressed.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: April 9, 2002
    Assignee: Murata Manufactoring Co., Ltd.
    Inventors: Kazumasa Haruta, Sadao Yamashita
  • Patent number: 6369664
    Abstract: A voltage controlled oscillator is provided which oscillates in a stable manner at a high frequency and obtains a large variable range of frequency. The oscillator includes a transistor, and distributed-constant line connected to the base of the transistor. The distributed-constant line has substantially 1/4 wavelength at the oscillation frequency of the oscillator, and has one open end. An inductance element is provided comprising a capacitor having a self-resonance frequency which is lower than the oscillation frequency. This inductance element is connected to the collector of the transistor. A varactor diode is connected to the capacitor.
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: April 9, 2002
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Satoru Muto, Osamu Oe
  • Publication number: 20020033740
    Abstract: In a feedback type oscillation circuit including a first microstrip line connected to a signal input terminal of a transistor, a second microstrip line connected to a signal output terminal of the transistor, and a dielectric resonator coupled with the microstrip lines at high frequency, the first and second microstrip lines are provided with patterns that are branched off from the respective microstrip lines, each at an arbitrary angle.
    Type: Application
    Filed: February 2, 2001
    Publication date: March 21, 2002
    Inventor: Hitoshi Nitta
  • Publication number: 20020011903
    Abstract: A resonator minimizes degradation of the Q factor, accurately adjusts the frequency, and reduces the size and profile thereof. A voltage controlled oscillator including such a resonator includes a multilayer substrate. The multilayer substrate includes a first grounding conductor layer, a first dielectric layer, a strip line layer, a second dielectric layer, a second grounding conductor layer, and a third dielectric layer. A strip line is disposed on the strip line layer, and a microstrip line is disposed on the third dielectric layer. The strip line is connected to the microstrip line via a through hole to define the resonator. A portion of the second grounding conductor layer that faces the microstrip line is removed.
    Type: Application
    Filed: July 10, 2001
    Publication date: January 31, 2002
    Inventor: Yoshinori Takahashi
  • Patent number: 6326857
    Abstract: A voltage controlled oscillator formed as a first layout with metallized areas by a planar technique is located on a high dielectric loss substrate. A second layout formed of metallized area for control circuits of the voltage controlled oscillator is formed on a high loss dielectric substrate is also formed by the same technique as the first layout. A ground plane for the controlling oscillator is formed on an opposite side of the dielectric substrate on which the voltage controlled oscillator is formed.
    Type: Grant
    Filed: February 10, 2000
    Date of Patent: December 4, 2001
    Assignee: Siemens Inofmraton and Communication Networks S.p.A.
    Inventors: Carlo Buoli, Giovanni Mora
  • Publication number: 20010033203
    Abstract: A miniaturized oscillator that is manufactured with greatly reduced production time and cost includes transmission lines defining resonance circuits provided on a circuit assembly board. In this state, the impedance of each transmission line is measured. Then, according to the transmission line impedance, chip components having impedances necessary to obtain a predetermined frequency are selected and mounted on the circuit substrate. With this arrangement and method of formation, the resulting oscillator oscillates at the desired oscillation frequency and it is not necessary to trim the transmission lines in order to achieve this result. Since the oscillator does not require time to make frequency adjustments and does require use of a trimming apparatus, no deterioration in the electric characteristics due to laser trimming occurs. In addition, it is unnecessary to provide an electrode land for making frequency adjustments. As a result, the entire oscillator is miniaturized.
    Type: Application
    Filed: March 26, 2001
    Publication date: October 25, 2001
    Inventors: Shinji Goma, Masao Uno
  • Publication number: 20010030583
    Abstract: A voltage controlled oscillator includes an oscillating transistor having a collector coupled to ground at high frequencies. A first end of a microstrip is coupled to a base of the oscillating transistor by a first varactor diode. A second end of the microstrip is coupled to a second varactor diode. The length of the microstrip is about ½ to about ¾ of the wavelength of an oscillation frequency.
    Type: Application
    Filed: April 17, 2001
    Publication date: October 18, 2001
    Applicant: Alps Electric Co., Ltd.
    Inventor: Yasuhiro Ikarashi
  • Publication number: 20010028279
    Abstract: A method for adjusting a voltage control type oscillator prevent changes in characteristics from occurring after adjustments and permits the oscillator to be produced at a low cost. The voltage control type oscillator includes a strip electrode provided on a first surface of a dielectric substrate and a ground electrode provided on a second surface of the dielectric substrate. The strip electrode and the ground electrode constitute a microstrip line resonator. In addition to the resonator, electric components are mounted on the first surface of the dielectric substrate. A case is attached to the dielectric substrate such that the case covers the strip electrode and the electronic components. After attaching the case, the strip electrode is trimmed by irradiating a laser beam from the second surface side of the dielectric substrate.
    Type: Application
    Filed: April 5, 2001
    Publication date: October 11, 2001
    Inventor: Yasuhiro Hayashi
  • Publication number: 20010026195
    Abstract: A negative resistance circuit having an output terminal is connected to a first terminal of a strip shaped resonator. Anode of a variable capacitance diode is connected to a second terminal of the strip shaped resonator via a capacitor 1′. Cathode of the variable capacitance diode is grounded. One terminal of a high impedance strip shaped line is connected to the anode of the variable capacitance diode. Other terminal of the strip shaped line is grounded via a capacitor 4. The capacitor 4 has sufficiently low impedance at an oscillation frequency.
    Type: Application
    Filed: March 23, 2001
    Publication date: October 4, 2001
    Applicant: FUJITSU QUANTUM DEVICES LIMITED
    Inventors: Tsuneo Tokumitsu, Osamu Baba
  • Publication number: 20010019293
    Abstract: In a microwave oscillation circuit using a dielectric resonator, a bias resistor for determining a bias voltage supplied to a base terminal of a transistor is located in the neighborhood of a connection point between a feedback circuit side stub for the dielectric resonator and the base terminal of the transistor. The bias resistor has a resistance which basically determines a bias voltage supplied to the base terminal of the transistor and which is enough to make high the impedance of a bias voltage supplying circuit including the bias resistor, viewed at the input terminal of the transistor. Thus, a stable oscillation can be maintained independently of variation in a load impedance.
    Type: Application
    Filed: March 2, 2001
    Publication date: September 6, 2001
    Inventors: Yasushi Kose, Akihiro Ogisou