Patents Assigned to M/A-Com
  • Publication number: 20090073066
    Abstract: An antenna comprising a layer of conductor having a plurality of non-conductive slits disposed therein, each slit comprising a longitudinal dimension greater than a transverse direction, a feed line disposed beneath the layer of conductor to couple signal energy between the feed line and the slits, wherein the feed line crosses each slit in the transverse direction at least once, and a dielectric layer separating the layer of conductor from the feed line.
    Type: Application
    Filed: September 14, 2007
    Publication date: March 19, 2009
    Applicant: M/A-Com, Inc.
    Inventors: David Frederick Jordon, Thomas Sherman Laubner
  • Publication number: 20090073065
    Abstract: An antenna comprising a layer of conductor having an edge, and a slot in the layer of conductor wherein conductor is absent, the slot having first and second opposing longitudinal ends and being opened to the edge at the first longitudinal end and not open to the edge at the second longitudinal end.
    Type: Application
    Filed: September 14, 2007
    Publication date: March 19, 2009
    Applicant: M/A-Com, Inc.
    Inventor: David Frederick Jordan
  • Patent number: 7502422
    Abstract: A transmitter comprises a baseband processor, a wideband phase modulator and an amplitude modulated amplifier. A signal is provided through the baseband processor and is converted into polar coordinates, comprised of amplitude and phase components, with the amplitude component being transmitted to the amplitude modulated amplifier. The amplitude modulated amplifier being comprised of independently controllable current sources, and with the phase component being transmitted to the wideband phase modulator, for modulation upon a carrier wave, and subsequent transmission to the amplitude modulated amplifier for amplification according to control imposed by the amplitude component upon the current sources.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: March 10, 2009
    Assignee: M/A—COM, Inc.
    Inventors: Anthony Dennis, Yongwen Yang, Walid Ahmed, Radwan Husseini, David Bengtson
  • Publication number: 20090051463
    Abstract: A circuit for combining/splitting at least two RF signals comprising: (a) at least two or more transmission portions coupled at an intersection, the intersection having a common port for inputting or outputting a combination of the at least two RF signals; (b) each transmission portion extending from the intersection to a port for inputting or outputting a selection of signals from the combination, and comprising at least one set of intersecting transmission lines; (c) each set of intersecting transmission lines rejecting a particular signal of the combination; and (d) each intersecting transmission line of a given set having a length of about an odd multiple of a quarter wavelength of the particular signal which is rejected by the given set.
    Type: Application
    Filed: August 1, 2008
    Publication date: February 26, 2009
    Applicant: M/A-Com, Inc.
    Inventor: Clyde Maynord Callewaert
  • Publication number: 20090045888
    Abstract: Various directional coupler arrangements are disclosed. For instance, an apparatus includes first, second, and third conductive patterns disposed on a substrate. Each of these conductive patterns includes a first end and an opposite second end. Moreover, each of these conductive patterns includes a first protrusion at its first end and a second protrusion at its second end.
    Type: Application
    Filed: August 14, 2007
    Publication date: February 19, 2009
    Applicant: M/A-COM EUROTEC BV
    Inventor: Michael Wren
  • Publication number: 20090032917
    Abstract: The present disclosure relates to a lead frame package comprising a die attach pad and two or more electrical interconnections, wherein at least one of the two or more interconnections is affixed to the die attach pad for electrically grounding the lead frame package. The present disclosure further relates to a method for providing a lead frame package. The lead frame package comprises two or more electrical interconnections and a die attach pad. At least one electrical interconnection is affixed to the die attach pad to ground the lead frame package and at least one of the electrical interconnections is an RF signal interconnection. At least one of the die attach pad and the at least one grounding electrical interconnection is connected to a grounding contact of a circuit-board. The at least one RF signal electrical interconnection is connected to an RF signal contact on the circuit-board, thereby forming a mounted semi-conductor circuit.
    Type: Application
    Filed: August 2, 2007
    Publication date: February 5, 2009
    Applicant: M/A-COM, Inc.
    Inventor: Ryosuke Ito
  • Publication number: 20090028216
    Abstract: The invention is a method and circuit for generating a pulsed periodic signal comprising a sub-harmonic mixer and a control circuit adapted to cause the output signal of the sub-harmonic mixer to be pulsed.
    Type: Application
    Filed: July 26, 2007
    Publication date: January 29, 2009
    Applicant: M/A-Com, Inc.
    Inventor: Robert Ian Gresham
  • Publication number: 20080284632
    Abstract: An analog to digital converter that first converts an analog input voltage into first and second periodic signals having a phase difference there between that is a function of the analog input voltage and then introduces the first periodic signal into a forward direction data path through a series of consecutive delay cells so that the first periodic signal propagates through the cells via the first series of delay elements in a first direction, and introduces the second periodic signal into a reverse direction data path through the same series of delay cells so that the second periodic signal propagates through the cells via the second series of delay elements in an opposite direction, and using the second periodic signal to latch the first periodic signal in each cell so as to generate an output signal for each cell, said output signals of said cells collectively indicating the unique cell in which the leading edges of corresponding pulses in the first and second directions met, and decoding the outputs of
    Type: Application
    Filed: May 18, 2007
    Publication date: November 20, 2008
    Applicant: M/A-Com, Inc.
    Inventor: Laurent Claude Perraud
  • Publication number: 20080272861
    Abstract: The invention is an apparatus and technique for tuning the cross coupling of resonators in a dielectric resonator circuit. A cross coupling element such as a coaxial cable having a first end positioned adjacent a first resonator in the circuit and a second end position adjacent a second resonator is supported on the housing of the circuit intermediate its first and second ends. At least one end of the cross coupling element is in contact with a cross coupling tuning element that extends through an external wall of the housing so that it can be manipulated from outside of the housing to move the corresponding end of the cross coupling element relative to the adjacent resonator inside the housing without opening the housing.
    Type: Application
    Filed: May 2, 2007
    Publication date: November 6, 2008
    Applicant: M/A-Com, Inc.
    Inventors: Charles Joseph Henault, Glen Brian Rochford
  • Publication number: 20080272860
    Abstract: A dielectric resonator circuit is provided that is tunable over a broad frequency range and/or a broad bandwidth range. The center frequency is made tunable over a broad range by use of a dielectric tuning plug that is positioned in a through hole within the resonator. The bandwidth is made tunable over a broad range by tilting the resonators relative to the enclosure to increase the effective height of the cavity as seen by the resonator.
    Type: Application
    Filed: May 1, 2007
    Publication date: November 6, 2008
    Applicant: M/A-Com, Inc.
    Inventor: Kristi Dhimiter Pance
  • Patent number: 7446693
    Abstract: An analog to digital converter that first converts an analog input voltage into first and second periodic signals having a phase difference there between that is a function of the analog input voltage and then introduces the first periodic signal into a forward direction data path through a series of consecutive delay cells so that the first periodic signal propagates through the cells via the first series of delay elements in a first direction, and introduces the second periodic signal into a reverse direction data path through the same series of delay cells so that the second periodic signal propagates through the cells via the second series of delay elements in an opposite direction, and using the second periodic signal to latch the first periodic signal in each cell so as to generate an output signal for each cell, said output signals of said cells collectively indicating the unique cell in which the leading edges of corresponding pulses in the first and second directions met, and decoding the outputs of
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: November 4, 2008
    Assignee: M/A-Com, Inc.
    Inventor: Laurent Claude Perraud
  • Patent number: 7439610
    Abstract: A high power shunt switch comprises a leadframe including a paddle for supporting a shunt element, and a plurality of bond pads located around a periphery of the paddle, wherein at least a first subset of the bond pads are aligned in a substantially straight-line configuration. A shunt element is fixedly attached to the paddle and wire bonded to a top surface of one the bond pads. An encapsulant is disposed on the paddle, the shunt element, the plurality of bond pads, and the wire bond, thereby forming an encapsulated package structure. The package structure is positioned and attached to a transmission line such that the bottom surfaces of each of the at least first subset of bond pads are in simultaneous contact with the transmission line. The package structure and the transmission line are fixedly attached to a suitable substrate.
    Type: Grant
    Filed: June 16, 2006
    Date of Patent: October 21, 2008
    Assignee: M/A-COM, Inc.
    Inventor: Christopher D. Weigand
  • Patent number: 7440729
    Abstract: Apparatus, methods and articles of manufacture for output impedance matching in multi-band power amplification are provided, wherein an output matching configuration comprising one or more output matching sections, a multi-band diplexer and a switch are connected to an active device.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: October 21, 2008
    Assignee: M/A-Com Eurotec B.V.
    Inventors: Piotr Solski, Andrei Grebennikov, Eugene Heaney
  • Patent number: 7436339
    Abstract: A system, apparatus, method and article to emulate a filter using digital elements are described. The apparatus may include a digital-to-analog converter having an impulse response emulator, the impulse response emulator to receive multiple digital signals each having a predetermined waveform, and convert a sequence of bits from each digital signal to a predetermined analog waveform corresponding to the sequence of bits using a lookup table or digital filter. Other embodiments are described and claimed.
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: October 14, 2008
    Assignee: M/A-Com, Inc.
    Inventors: Walid Khairy Mohamed Ahmed, Anthony Dennis
  • Publication number: 20080238793
    Abstract: A planar antenna comprising a signal path for receiving or transmitting a signal, a conductive layer having a slot formed therein positioned to electromagnetically couple with the signal path, a conductive plate parallel to and overlying the slot and spaced therefrom by a dielectric layer, the conductive plate being electrically in contact with the signal path, and one or more patches parallel to and above the conductive plate.
    Type: Application
    Filed: March 28, 2007
    Publication date: October 2, 2008
    Applicant: M/A-Com, Inc.
    Inventor: Eswarappa Channabasappa
  • Patent number: 7427949
    Abstract: A multi-element antenna with sufficiently small return loss and mutual coupling signals to allow the simultaneous transmission of powerful radar signals and the reception of faint target return signals. The microstrip patch antenna has radio frequency absorbing material place between neighboring antenna elements to reduce the mutual coupling leakage signals.
    Type: Grant
    Filed: December 5, 2005
    Date of Patent: September 23, 2008
    Assignee: M/A-COM, Inc.
    Inventors: Eswarappa Channabasappa, Robert Egri
  • Patent number: 7426372
    Abstract: An apparatus and method for amplifying a radio frequency signal including, generating a plurality of shaped pulses utilizing a piecewise linearizer circuit, applying the plurality of shaped pulses to a first input of a radio frequency amplifier circuit, and injecting a radio frequency carrier into a second input of the radio frequency amplifier circuit. The apparatus comprises a piecewise linearizer (PWL) circuit coupled to the input of a Radio Frequency Digital to Analog Converter (RFDAC) operating as a signal amplifier.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: September 16, 2008
    Assignee: M/A-COM Eurotec B.V.
    Inventor: Gerard T. Quilligan
  • Patent number: 7420512
    Abstract: An antenna system for a radio frequency identification system comprising: (a) a base; (b) a first patch antenna disposed on the base and having a circular polarization and adapted to convert between electrical signals and electromagnetic fields; and (c) a second patch antenna disposed on the base and having a circular polarization and adapted to convert between electrical signals and electromagnetic fields, the second antenna being disposed at a distance from the first antenna to define a region between the first and the antenna, the second patch antenna being positioned relative to the first patch antenna such that the electromagnetic fields of the two antennas are substantially opposing in the region.
    Type: Grant
    Filed: August 2, 2005
    Date of Patent: September 2, 2008
    Assignee: M/A-COM, Inc.
    Inventors: Matthew Lannon, Clyde Callewaert
  • Patent number: 7417513
    Abstract: A system and method for modulating a phase component of an electromagnetic signal includes a phase/frequency detector having first and second inputs and an output. The first phase/frequency detector input may be configured to receive a reference signal. The system may include an oscillator having an input and an output. The oscillator may be configured to generate a desired oscillator output signal at its output. A divider may be configured to receive the oscillator output signal. The divider may have a divider count input and a divider carryout output that may be connected to the second phase/frequency detector input. A loop filter may be connected in series between the phase/frequency detector output and the oscillator input. The loop filter has a transfer function including at least two frequency response rate change points, where each of the frequency rate change points corresponds to a pole or a zero in the transfer function.
    Type: Grant
    Filed: August 17, 2005
    Date of Patent: August 26, 2008
    Assignee: M/A-COM, Inc.
    Inventors: Walid Khairy Mohamed Ahmed, David Bengtson
  • Patent number: 7411560
    Abstract: An apparatus includes a monopole extending substantially along an axis that may be vertical. However, the monopole may have a loop portion that deviates from the axis. Further, the apparatus includes multiple conductive elements, each having a substantially linear first segment that is coupled to the monopole. The first segments may be coplanar and/or perpendicular to the axis. Each of the conductive elements may further include a second segment that is substantially parallel to the axis. One or more of these segments may be connected to a ground potential. Also, the conductive elements may each include a third segment having a loop pattern.
    Type: Grant
    Filed: September 30, 2006
    Date of Patent: August 12, 2008
    Assignee: M/A-Com, Inc.
    Inventor: David Frederick Jordan