Abstract: A power combiner/distributor including first, second, and third waveguides connected with each other in a planar shape, and for either one of distributing power inputted from the first waveguide to the second and third waveguides and combining powers inputted from the second and third waveguides to input the combined power to the first waveguide is provided. The power combiner/distributor includes a branch circuit connected with the first waveguide and for branching a transmission path formed in the first waveguide into first and second transmission paths, and decoupling circuits connected with the branch circuit and also to the second and third waveguides, respectively, the decoupling circuits having a power losing resonator coupled to the second and third waveguides, resonating within an operation frequency band, and causing a power loss.

Abstract: A filtering device comprises an analogue quadrature splitter together with a first filtering element and a second filtering element. The filtering device is adapted to transform filtering characteristics of the first filtering element and filtering characteristics of the second filtering element into an effective filtering characteristic present in an output signal at an output terminal of the analogue quadrature splitter. The first filtering element and the second filtering element comprise filtering elements of high accuracy, with a steep roll-off but poor power handling capabilities. Using a high power quadrature splitter it is possible to transform the filtering characteristics of the first filtering element and/or the second filtering characteristic of the second filtering element into the effective filtering characteristics.

Abstract: A signal splitting apparatus comprises a micro-strip line, a first inductor and a second inductor. A first end and a second end of the micro-strip line are grounded via a first capacitor and a second capacitor, respectively. The first end and the second end of the micro-strip line are electrically coupled to a receiving part of a transceiver and a transmitting part of the transceiver, respectively. One end of the first inductor is coupled to the first end of the micro-strip, and the other end of the first inductor is electrically coupled to an antenna module and grounded via a third capacitor. One end of the second inductor is coupled to the second end of the micro-strip, and the other end of the second inductor is electrically coupled to the antenna module.

Abstract: In the present invention, a novel multi-port microwave circuit, also known as a multiple bi-directional circulator, is designed based upon the basis of the EBG characteristic of the meta-materials. Firstly, the concept of the traditional single-layered mushroom structure is extended with the suspending microstrip line to the multi-layered structure. In this way, the multi-layered structure can reveal multi-band EBG characteristic and achieve miniaturization. Moreover, we use three sets of proposed dual-band EBG circuit to be series-connected in a ring-type structure. By using proper impedance matching, the design of the multiple bi-directional circulator is accomplished. It combines the capabilities of the diplexer, the duplexer and the circulator. The triplex bi-directional circulator can integrate three kinds of communication systems with each other, which operates at frequencies comprising GSM 1800 MHz, WiFi 2.45 GHz, and WiMAX 3.5 GHz, respectively.

Abstract: A diplexing apparatus and method which utilizes composite right/left-handed (CRLH) phase-advance/delay lines combined with a coupler. By engineering CRLH-based transmission lines with desired phase responses at two arbitrary frequencies of interest, the connected CRLH delay line and/or CRLH coupler are excited in a manner such that signals at designated frequencies are separated to the corresponding output ports of the hybrid coupler. Benefits of the apparatus include elimination of design complexities such as optimization of the interconnection junctions and the harmonic spurious suppression involved in conventional filter-based diplexers. In addition, channel isolation is beneficially achieved from the isolation property of directional couplers. Measured insertion loss on the implementations was found to be less than 1 dB, with isolation greater than 20 dB in the dual bands. A high level of agreement was observed between simulated and measured results.

Abstract: A duplexer module that prevents degradation of isolation between signal lines includes transmission filters, reception filters, phase adjusting circuits, and a multilayer substrate. The transmission filters and the reception filters are constituted as separate discrete components. The multilayer substrate includes filter mount terminals to which the transmission filters are mounted, and filter mount terminals to which the reception filters are mounted. The filter mount terminals are arranged along an upper side of the multilayer substrate, and the filter mount terminals are arranged along a lower side of the multilayer substrate.

Abstract: The invention relates to a device for coupling individual high-frequency amplifiers (M1, M2, . . . Mn) operating at a frequency f, including n high-frequency inputs E1, E2, . . . Ei, . . . Ep, . . . En, n being an integer greater than 1, i and p being two integers between 1 and n, p being different from i, and a power high-frequency output (S) to supply a load (R) with a power which is the sum of the powers supplied by all the individual amplifiers connected via their power outputs to said high-frequency inputs. The coupling device includes n inductors L1, L2, Li, . . . Lp, . . . Ln connected by one of their ends to a respective high-frequency input, their other ends being connected together to one end (B) of an output capacitor (Cs) the other end of which is connected to the high-frequency output (S) in order to form as many series resonant LC circuits, resonating at the operating frequency f, between the inputs E1, E2, . . . Ei, . . . Ep, . . .

Abstract: Embodiments are directed to a RF combiner/splitter having a first port separated from a second port and a third port by a generally tapering microstrip section. The second and third ports are separated by a generally rectangular bridge bar having a width selected to match the impedance of devices to be connected to the second and third ports and a length selected to provide a separation between the second and third ports of approximately quarter wavelength at a center point of an operational frequency of the devices. In a first embodiment, a horizontal RF choke joint is positioned between the first port and the tapering section. In a second embodiment, one choke joint is positioned between the second port and the bridge bar and a second choke joint is positioned between the third port and the bridge bar.

Abstract: A splitter device includes a first splitter comprising an input leg coupled to a provider content input port, a first output leg, and a second output leg. The provider content input port is configured to receive a downstream-propagating provider bandwidth. The splitter device further includes a first conductive path coupled to the first output leg of the first splitter, and a second conductive path coupled to the second output leg of the first splitter. The splitter device further includes a second splitter having an input leg coupled to a first home network bandwidth, a first output leg coupled to the first conductive path, and a second output leg. The splitter device further includes a third splitter having an input leg coupled to a second home network bandwidth, a first output leg coupled to the second conductive path, and a second output leg. The splitter device further includes a bridge circuit operatively coupled between the first conductive path and the second conductive path.

Abstract: The present invention is directed to a system that includes a front-end interface device having a first front-end interface port, a second front-end interface port and a third front-end interface port. The front-end interface device is configured to split a first signal directed into the first front-end interface port into a second signal provided at the second front-end interface port and a third signal provided at the third front-end interface port. An N-way high-band device includes a first high-band device port coupled to the second front-end interface port and N second high band ports. An N-way low-band device includes a first low-band device port coupled to the third front-end interface port and N-second low band ports. N back-end interface devices are coupled to the N-way high-band device and the N-way low-band device.

Abstract: A band pass filter combiner carrying a broadband signal with a central frequency comprises a power divider, a high pass band filter, a low pass band filter, and a power combiner. The distance from the signal input port of the power divider to each of signal input ports of the high pass band filter and the low pass band filter is equal to a quarter of the wavelength at the central frequency. The distance from each of signal output ports of the high pass band filter and the low pass band filter to the signal output port of the power combiner is also equal to a quarter of the wavelength at the central frequency.

Abstract: A transceiver module for a satellite antenna comprises a base and a cover. The base includes a transducer extending between a first end plate and a second end plate in a first direction, a first filter portion including a number or first grooves extending in the first direction and arranged along a second direction orthogonal to the first direction, and a waveguide to guide signals toward a third end plate. The cover serves as a second filter portion for the transceiver module and includes a number of second grooves arranged along the second direction. The base includes the transducer, the first filter portion and the waveguide as an integral member.

Abstract: A duplexer includes: a reception filter connected between a reception terminal and an antenna terminal; a transmission filter connected between a transmission terminal and the antenna terminal; and a wiring substrate including the reception filter and the transmission filter in an upper surface, the reception terminal, the transmission terminal and the antenna terminal being formed in a lower surface, and a reception electrode electrically connected to the reception terminal, a transmission electrode electrically connected to the transmission terminal, an antenna electrode electrically connected to the antenna terminal, and a circular metal layer surrounding the reception, transmission and antenna electrodes, and electrically connected to a ground being formed in an upper surface, wherein a shortest distance between a side of the circular metal layer closest to the reception and transmission terminals and the reception electrode is larger than a width of the side of the circular metal layer.

Abstract: Disclosed herein is an asymmetric power divider. The asymmetric power divider includes a power dividing unit, a first matching network, and a second matching network. The power dividing unit supplies different amounts of power to a carrier amplifier and a peaking amplifier, which are connected in parallel. The first matching network is connected between the power dividing unit and the carrier amplifier so as to perform impedance matching between the power dividing unit and the carrier amplifier. The second matching network is connected between the power dividing unit and the peaking amplifier so as to perform impedance matching between the power dividing unit and the peaking amplifier.

Abstract: The present disclosure provides a duplexer for separating a transmit signal and a receive signal. The duplexer comprises a transmit filter, a receive filter and an analogue quadrature splitter, a first filtering element and a second filtering element. By choosing the first filtering element and the second filtering element substantially identical, it is possible to transform filtering characteristics of the first and second filtering element such that stop bands are substantially transformed into an effective pass band, and vice versa. The analogue quadrature splitter is adapted to increase an attenuation of the transmit signals outside the transmit band, such as in the receive band. Therefore out-of-band emissions by the transmitter will be substantially reduced. The present disclosure further provides a method for separating a transmit signal and a receive signal, and computer program products for the manufacture for carrying out the method of separating transmit signals and receive signals.

Abstract: A band combining filter for filtering a microwave signal having at least one band edge at a band edge transition frequency. The filter comprises a plurality of filter sections. Each filter section comprising 3dB hybrid couplers having input ports and output ports and resonators connected between the input ports and the output ports of the couplers. The filter sections are connected in cascade such that the outputs of one filter section are connected to the inputs of the next filter section in the cascade. A subset of the filter sections are high Q filter sections with the Q values of the resonators of those filter sections having values each of which are at least a factor of three higher than the Q values of the resonators of the remaining filter sections.

Abstract: A tunable duplexer using voltage-controlled varactors is presented. The center frequency, the pass band, and the stop band are each tunable to meet system requirements. A calibration circuit driving digital to analog converters produces the necessary voltages used in the resonant circuits. The tunable duplexer can be fabricated on a single silicon chip. On-chip transformers can be used to reduce the voltage level of signals in the filters to improve the linearity of the duplexer.

Abstract: A duplexer module prevents a transmission signal and a reception signal in the same band from interfering with each other. The duplexer module includes a transmission line, a reception line, and an antenna common line. In addition, the duplexer module includes a plurality of mounting electrodes arranged along the four sides of an outer edge of a mounting surface of a multilayer substrate. The fourth mounting electrode defining a monitoring port is disposed on a side different from a side on which each of the first mounting electrode defining a transmission port, the second mounting electrode defining a reception port, and the third mounting electrode defining an antenna port is disposed. The fourth mounting electrode defining the monitoring port is a mounting electrode used to output a signal of the monitoring line through which a portion of electrical power is transmitted from the transmission line.

Abstract: A duplexer includes a transmission filter connected between a common terminal and a transmission terminal, a reception filter connected between the common terminal and a reception; and a capacitor connected in parallel with the transmission filter and the reception filter between the transmission terminal and the reception terminal and has a capacitance so that a phase difference between a signal passing from the transmission terminal to the reception terminal through the transmission filter and the reception filter and a signal passing from the transmission terminal to the reception terminal through the capacitor, or connected in parallel with the reception filter between the common terminal and the reception terminal and has a capacitance so that a phase difference between a signal passing from the common terminal to the reception terminal through the reception filter and a signal from the common terminal to the reception terminal through the capacitor.

Abstract: The present disclosure teaches a filtering device. The filtering device comprises a transforming unit, at least a first filtering element and a complementary filtering unit. The filtering device of the present disclosure allows an isolation of radio signals within a selected frequency band. Frequency bands closely-spaced to the selected frequency band may be suppressed. The present disclosure provides a reliable and almost identical response to temperature changes for the pass band within the selected frequency band and the stop bands closely-spaced to the selected frequency band. The filtering device withstands temperature changes without affecting a filtering performance different to the prior art. The present disclosure further provides a method for filtering an input signal as well as a computer program product for the manufacture of the filtering device and a computer program product for the carrying out of the method of filtering.

Abstract: The present invention relates to a method and system for high-speed bandpass serial data communication. A driver receives at least one data signal and generates a bandpass data signal for transmission through a bandpass waveguide interconnect. The bandpass data signal is launched into the bandpass waveguide interconnect using a first adaptor and extracted therefrom after transmission using a second adaptor. A receiver connected to the second adaptor recovers the at least one data signal from the extracted bandpass data signal. A dispersion compensation circuit receives one of the at least one data signal and the bandpass data signal and information indicative of a phase response of the bandpass waveguide interconnect and dispersion compensates the one of the at least one data signal and the bandpass data signal by compensating the phase response of the bandpass waveguide interconnect.

Abstract: In a duplexer module, a transmitting signal is correctly monitored without deteriorating receiving sensitivity. The duplexer module includes a transmission line, a reception line, and an antenna common line, and performs conversion between a transmission signal and a reception signals and antenna common signals. A transmission filter is inserted into the transmission line, and the transmission filter allows the transmission signal to pass therethrough and stops the reception signal. A reception filter is inserted into the reception line, and the reception filter allows the reception signal to pass therethrough and stops the transmission signal. A first line of a coupler which detects the transmitting signal is inserted into the transmission line at a stage subsequent to the transmission filter.

Abstract: A demultiplexer has a common terminal, a transmission terminal, and a reception terminal, and furthermore includes a transmission filter connected between the common terminal and the transmission terminal, a reception filter connected between the common terminal and the reception terminal, and a phase shift circuit connected in series to the reception filter connected between the common terminal and the reception terminal. A node on the line from the phase shift circuit to the common terminal or the transmission terminal, and a node on the line from the phase shift circuit to the reception terminal are coupled via a reactance. Accordingly, it is possible to fundamentally reduce or eliminate the situation in which transmission signals from the transmission filter arrive at the reception circuit, and improve isolation.

Abstract: A duplexer module that is used for transmission and reception of a signal in at least two communication systems using different frequency bands includes a wiring board, dual transmission filters in a transmission filter unit that is provided on the wiring board and that includes a transmission filter, and dual reception filters in a reception filter unit that is provided on the wiring board and that includes a reception filter. Each of the dual reception filters includes at least two reception filters having different frequency bands, and the output side of the reception filters is shared between the reception filters such that a common output terminal is provided for the reception filters.

Abstract: Distributed band reject filters are disclosed. A band reject filter includes a first acoustic resonator and a second acoustic resonator, each of which has either shunt resonators adapted to resonate substantially at respective resonance frequencies defining a rejection frequency band or series resonators adapted to anti-resonate substantially at respective anti-resonance frequencies defining the rejection frequency band. These resonators are connected through a phase shifter which imparts an impedance phase shift of approximately 45° to 135°. Exemplary applications of the band reject filters disclosed herein include implementation as an inter-stage band reject filter for a base station power amplifier for a wireless communication system, as a radio frequency band reject filter in a duplexer for a wireless communication terminal, and in a low noise amplifier input stage.

Abstract: Described is a filtering arrangement in which a first filter is configured to exhibit a first frequency response FR and has a first node and a second node; a second filter is configured to exhibit a second FR and has a first node and a second node; and a third filter is configured to exhibit a third FR and has a first node and a second node. A first common node interfaces the second node of the first filter with the second node of the second filter; and a second common node interfaces the first node of the second filter with the first node of the third filter. The second FR exhibited by the second filter isolates a first signal on a first signal path between the first node of the first filter and the first common node from a second signal on a second signal path between the second common node and the second node of the third filter.

Abstract: There is provided a radio communication apparatus for transmitting transmission signals of the channel CH1 and the channel CH2, including a first antenna, a second antenna, a dual-band transmitting/receiving circuit having a first terminal for the channel CH1 and a second terminal for the channel CH2, a first branching circuit configured to receive a transmission signal from the first terminal or the second terminal, a second branching circuit configured to divide the transmission signal from the first branching circuit between the first antenna and the second antenna, and a transmission line configured to connect the first branching circuit and the second branching circuit.

Abstract: A diplexer circuit comprising a common terminal, a low-frequency-side terminal, a high-frequency-side terminal, a low-frequency-side path comprising a low-frequency filter disposed between the common terminal and the low-frequency-side terminal, and a high-frequency-side path comprising a high-frequency filter disposed between the common terminal and the high-frequency-side terminal, the low-frequency filter comprising a first transmission line series-connected to the low-frequency-side path and a capacitor parallel-connected to part of the first transmission line.

Abstract: A duplexer includes a transmit filter connected between a common terminal and a transmission terminal, a receive filter connected between the common terminal and a reception terminal, a capacitor connected in parallel with one of the transmit filter and the receive filter and provided between two terminals of the common terminal, the transmission terminal, and the reception terminal, and a package. The package includes an insulating layer, foot pads that include the common terminal, the transmission terminal and the reception terminal and are formed on one surface of the insulating layer, and interconnections formed on another surface opposite to the one surface of the insulating layer. The capacitor is composed of two capacitor forming units that are connected in parallel with each other and are formed with at least one foot pad of the foot pads and two of the interconnections that overlap with two opposing sides of the at least one food pad respectively.

Abstract: A filter includes: a converter circuit, provided with a single-type common terminal and two balanced terminals, for performing conversion between a balanced line and an unbalanced line; two filter units coupled to each of the balanced terminals of the converter circuit and allowing passage of a signal in a pass band; and a bridging capacitor arranged to extend across the converter circuit and one of the filter units in a bridging manner, wherein the inductance of an opposite-side line of one of the filter units relative to the converter circuit is electromagnetically coupled to the inductance of a line coupling the other filter unit and the converter circuit.

Abstract: The present invention relates to a lumped cross-coupled Wilkinson circuit having a pair of magnetically cross-coupled inductive elements coupled to an isolation network. By magnetically cross-coupling the inductive elements, which have a mutual inductance, the inductance of each inductive element will be significantly less than the inductance of each inductive element in an equivalent lumped traditional Wilkinson combiner. Since the inductance of each inductive element is less, the size of each inductive element may be significantly smaller and the resistive loss of the each inductive element may be significantly smaller. In one embodiment of the present invention, the lumped cross-coupled Wilkinson circuit operates as a lumped cross-coupled Wilkinson combiner. In an alternate embodiment of the present invention, the lumped cross-coupled Wilkinson circuit operates as a lumped cross-coupled Wilkinson splitter.

Abstract: The present invention concerns a bandstop filter for preventing signals of frequencies used for inter-device communications in a television signal distribution system from interfering with a signal source. The filter is designed to work with a signal splitter and reduce the negative impact on inter-device communication through the splitter caused by conventional bandstop filters. The filter adds a section to a bandstop filter to provide a resistive load and high output impedance at the port feeding the splitter largely through the action of a parallel resonant circuit.

Abstract: A technique for realizing module size reduction while enhancing the anti-ESD characteristic of a low frequency band circuit without the need to add such an element as an ESD filter. In a diplexer included in a high-frequency power amplifier module, a composite grounding inductor with respect to an antenna terminal is formed of three inductors including a series inductor contained in a lowpass filter. Since an ESD signal contains main components thereof belonging to a frequency band of the order of a few hundreds of MHz or lower, the ESD signal is allowed to pass through a lowpass filter with little to no attenuation. Under this condition, a function for ESD filtering from the antenna terminal to an antenna switch circuit is provided by using the composite grounding inductor mentioned above and an electrostatic capacitor element, thereby suppressing passage of the ESD signal to the antenna switch circuit.

Abstract: A high-frequency module includes a balanced demultiplexer including a pair of balanced signal terminals and that has at least one of high differential isolation and high differential attenuation. A distance between an antenna terminal and a second balanced signal terminal provided on a mounting surface of a circuit board is greater than the antenna terminal and a first balanced signal terminal. On a back surface of the circuit board, a distance between a first back surface side electrode pad to which the antenna terminal is connected and a fourth back surface side electrode pad to which the second balanced signal terminal is connected is less than a distance between the first back surface side electrode pad to which the antenna terminal is connected and a third back surface side electrode pad to which the first balanced signal terminal is connected.

Abstract: A duplexer of the present invention includes a reception filter (3) for passing signals in a predetermined frequency band and attenuates signals in the other frequency bands among reception signals input to an antenna port, and a transmission filter (4) for passing signals in a predetermined frequency band and attenuates signals in the other frequency bands among transmission signals input from the outside and outputting them to the antenna port. The duplexer further includes a conversion circuit (22) provided with a single-ended input terminal connected to the antenna port and balanced output terminals. The reception filter (3) is provided with a balanced input terminal connected to the output terminal of the conversion circuit (22) and a balanced output terminal for outputting the filtered reception signal.

Abstract: Disclosed is a radio-frequency divider comprising: an input port; and two output ports, separated by a bridge bar, wherein the divider is arranged in microstrip form and the microstrip structure takes the form of a generally tapering section connecting the input port to the bridge bar such that the input port is positioned at the relatively thinner end of the tapering section and the bridge bar is positioned at the relatively wider end of the tapering section. Also disclosed is a corresponding method. The divider is able to operate equally as a combiner.

Abstract: A CRLH resonator-based band-pass filter includes at least two CRLH resonators. The resonators are connected by capacitive coupling. The resonators includes a microstrip line having input and output ports. The microstrip line includes a first interdigital line serial-connected to the input port, a second interdigital line serial-connected to the output port, a connection line connecting the first and second interdigital lines, and an inductor line parallel-connected to the connection line and provided with a grounded end.

Abstract: The invention relates generally to RF and microwave multiplexers implemented with a plurality of coupled resonators. More specifically, the present invention relates to multiplexers configured to require only a plurality of resonators and series, shunt, cross couplings and input/output couplings between them. It is a main feature of the invention that no microwave dividers, combiners, circulators, or other junctions are necessary for the distribution of microwave energy among the coupled resonators. This is achieved for example by a P-channel multiplexer comprising P rows of coupled resonators, a common input terminal connected to the first resonator of at least one of said rows, and P channel output terminals connected with the last resonator in each row, and at least one coupling between resonators belonging to different rows.

Abstract: The present invention discloses a tri-frequency duplexer circuit and multi-frequency duplexer circuit. The tri-frequency duplexer circuit comprises a microstrip line circuit, two first mushrooms, two second mushrooms and two third mushrooms. The microstrip line circuit comprises a first Input/Output (I/O) port, a second I/O port, a third I/O port and a fourth I/O port. The two first mushrooms are respectively disposed at transmission line paths between the first I/O port and the second I/O port and between the first I/O port and the third I/O port. The two second mushrooms are respectively disposed at transmission line paths between the first I/O port and the second I/O port and between the first I/O port and the fourth I/O port. The two third mushrooms are respectively disposed at transmission line paths between the first I/O port and the third I/O port and between the first I/O port and the fourth I/O port.

Abstract: Methods and systems for processing signals via power splitters embedded in an integrated circuit package may include generating via a power splitter, one or more RF signals proportional to one or more received RF signals. The power splitter may be integrated in a multi-layer package. The generated RF signals may be processed via an integrated circuit, which may be electrically coupled to the multi-layer package. The power splitters may include quarter wavelength transmission lines. The transmission lines may include a microstrip structure or a coplanar structure. The power splitters may be bonded to one or more capacitors in the integrated circuit. The capacitors may include CMOS devices in the integrated circuit. The power splitters may include lumped devices which may include surface mount devices coupled to the multi-layer package or devices within the integrated circuit, which may be flip-chip bonded to the multi-layer package.

Abstract: A multi-band high-frequency circuit for performing wireless communications among pluralities of communication systems having different communication frequencies. A high-frequency switch circuit contains: switching elements for switching the connection of pluralities of multi-band antennas to transmitting circuits and receiving circuits; a first diplexer circuit disposed between the high-frequency switch circuit and transmitting circuits for branching a high-frequency signal into frequency bands of the communication systems; and a second diplexer circuit disposed between the high-frequency switch circuit and receiving circuits for branching a high-frequency signal into frequency bands of the communication systems.

Abstract: Circuitry, architectures, devices and systems for multi-band radio communications using a balanced-unbalanced duplexer. An integrated balanced-unbalanced duplexer for multi-band communications may include an unbalanced multi-band port; a first balanced single-band port; a second balanced single-band port; a first unbalanced coupling arm conductively coupled to the unbalanced multi-band port; a second unbalanced coupling arm conductively coupled to the unbalanced multi-band port; a first pair of balanced coupling arms conductively coupled to the first balanced single-band port and electromagnetically coupled to the first unbalanced coupling arm; and a second pair of balanced coupling arms conductively coupled to the second balanced single-band port and electromagnetically coupled to the second unbalanced coupling arm. The architectures and/or systems generally include components embodying one or more of the concepts disclosed herein.

Abstract: A signal splitter comprising an input and a plurality of outputs is provided, wherein alternate outputs are connected to phase shifting devices. The phase shifting devices preferably comprise phase shifting transformers and introduce a phase shift of 180°, so that noise components of alternate outputs are antiphase and cancel one another out almost entirely when the signals are summed. Also provided is a cable television network comprising a plurality of such signal splitters to ensure that noise ingress in upstream signals passing into the network is substantially reduced.

Abstract: A semiconductor package having an impedance matching device is disclosed, which is especially applicable to conventional system-in-package structures and system packaging design with high-density I/O design. The impedance matching device achieves impedance matching between a semiconductor chip and a signal transmission wiring on the substrate or between different systems integrated in the semiconductor package by employment of a vertical conductive line or combination of a vertical conductive line and a stub transmission line. The vertical conductive line is electrically connected with the signal transmission wiring on the substrate at one end thereof, and the stub transmission line may be further connected to the other end of the vertical conductive line. This impedance matching device helps to effectively reduce the wiring area of an impedance matching network of the semiconductor package and enhance the flexibility and interchangeability in layout of the wiring.

Abstract: A radio frequency (RF) channelizer includes a first four-port balun, a second four part balun and a pair of filters coupled between the first and second four port baluns. The filters operate such that RF signals having a frequency within a desired frequency band (so-called “in-band” signals) can propagate between the first and second baluns (e.g. from the first balun to the second balun) while signals having a frequency outside the desired frequency band (so-called “out-of-band signals”) are reflected back to the first balun. One filter reflects out-of-band signals while maintaining the magnitude and phase of the signal (i.e. with a 0 degree phase shift), while the other filter reflects out-of-band signals with a phase-reversal (i.e. with a 180 degree phase shift). With this approach, the reflected signals propagate to a sum port (or even mode port) of the first balun. In this way, the balun-filter combination results in a channelizer which separates signals into different frequency bands.

Abstract: An orthomode transducer device (D), for an antenna, comprises (i) a main guide (GP) designed for the propagation along a main axis of first and second modes having polarizations orthogonal to each other and provided with a first end coupled to a circular port (AC) and a second end, (ii) a first auxiliary guide (GA1) designed for the propagation of the first mode along a first auxiliary axis and provided with a first end coupled in series to the second end of the main guide via a series window (FSP) and with a second end coupled to a series port (AS), and (iii) a second auxiliary guide (GA2) designed for the propagation of the second mode along a second auxiliary axis, coupled to the main guide via a parallel window (FPL) and provided with a first end coupled to a parallel port (AP). The first (GA1) and second (GA2) auxiliary guides are superposed.

Abstract: A filter package is provided with a support structure, a filter device having terminals, impedance matching circuits formed on the support structure and electrically connected to at least some of the terminals of the filter device, and at least one electrical ground structure electrically connected to the impedance matching circuits. Moreover, the filter package has an outer housing to contain the support structure, filter device, impedance matching circuits, and at least one ground structure.

Abstract: In a high-frequency module, a duplexer element and a matching element are mounted on a surface of a multilayer substrate. On a layer close to the surface, an individual-terminal-side wiring electrode connected to an individual terminal of the duplexer element is provided. On two layers below the layer close to the surface, first and second ground electrodes are respectively provided. On a layer below the layers on which the first and second ground electrodes are provided, a common-terminal-side wiring electrode connected to the common terminal of the duplexer element and one end of the matching element is provided. On a layer close to a bottom surface of the multilayer substrate, a third ground electrode connected to the other end of the matching element is provided.

Abstract: A multi-band high-frequency circuit for performing wireless communications among pluralities of communication systems having different communication frequencies, comprising a high-frequency switch circuit comprising switching elements for switching the connection of pluralities of multi-band antennas to transmitting circuits and receiving circuits; a first diplexer circuit disposed between the high-frequency switch circuit and transmitting circuits for branching a high-frequency signal into frequency bands of the communication systems; a second diplexer circuit disposed between the high-frequency switch circuit and receiving circuits for branching a high-frequency signal into frequency bands of the communication systems; the first and second diplexer circuits each comprising a lower-frequency filter circuit and a higher-frequency filter circuit, a bandpass filter circuit being used as the lower-frequency filter circuit in the second diplexer circuit, or disposed between the lower-frequency filter circuit in t

Abstract: A diplexer provides a high degree of design freedom for satisfying the requirements of electric characteristics so as to realize desired characteristics and at the same time can be downsized and a multiplexer is realized by using such a diplexer. The diplexer includes a filter having a first pass band and a filter having a second pass band with a frequency band at least twice as high as the frequency band of the first pass band, the filter having the first pass band being a filter of the lumped constant type, the filter having the second pass band being a filter of the distributed constant type.