Abstract: The present disclosure provides an electronic module including a circuit including a transmitting part and a receiving part physically separated from the transmitting part. The electronic module also includes an element isolated from the circuit and configured to block electrical interference between the transmitting part and the receiving part.

Abstract: Antenna-plexers for interference cancellation are provided herein. In certain embodiments, a wireless device includes an antenna, an antenna-plexer coupled to the antenna and configured to generate a feedback signal, a transmitter configured to transmit a transmit signal to the antenna by way of the antenna-plexer, a receiver configured to process a receive signal, and a feedback receiver configured to process the feedback signal from the antenna-plexer to provide compensation to the receive signal.

Abstract: A communications module includes a module substrate composed of a plurality of insulating layers, a plurality of wiring layers, and a plurality of wiring vias; and a filter module disposed on the module substrate. At least one of the wiring layers overlaps the filter module in a thickness direction of the module substrate and is connected to a ground potential to function as a ground layer, and an entirety of at least one of the wiring layers and at least one of the wiring vias disposed in a first region in the thickness direction of the module substrate between the filter module and the ground layer are electrically connected to the filter module.

Abstract: Methods and devices for radio frequency (RF) loopback for transceivers are described. A transceiver for communicating RF signals with a target device may transmit signals at a transmit frequency and receive signals at a (different) receive frequency. The transceiver may include a waveguide diplexer for separating and combining signals based on frequency. The transceiver may be configured to couple a loopback signal from a common port of the waveguide diplexer; the loopback signal may be based on a transmit signal. The transceiver may include a loopback translator to translate the loopback signal from the transmit frequency to the receive frequency and provide the translated loopback signal to a receiver used for receiving signals from the target device. The receiver may compare the translated loopback signal with a representation of the transmit signal to generate a compensation signal. A transmitter may use the compensation signal to adjust subsequent transmit signals.

Abstract: A wide-band antenna multiplexing method and device of an unmanned aerial vehicle (UAV) are disclosed. The method comprises: by a wide-band antenna, receiving an external signal and sending the received external signal to a first power divider; by the first power divider, dividing the external signal received from the wide-band antenna into multi-way sub-signals, and sending each sub-signal respectively to a receiving filter of a plurality of receiving filters, each of which is connected to the first power divider and corresponds to a functional modules of the UAV respectively; and by each respective receiving filter, performing filtering processing on the received sub-signal, obtaining a signal corresponding to the working frequency band of each respective functional module of the UAV, and sending the signal corresponding to the working frequency band of each respective functional module of the UAV to a corresponding functional module.

Abstract: The present disclosure provides a cavity filter assembly installed with an RF filter having an empty area formed between the RF filter and a cavity filter body serving as a ground to reduce the parasitic capacitance by forming the cavity filter body with a first pocket portion configured to install the RF filter and a second pocket portion within the first pocket portion in a position to overlap a transmission line, thereby reducing the insertion loss of the RF filter, which when serving as a low-pass filter, can position the harmonics in the stopband further away from the cutoff frequency and thus effect improved frequency characteristics of the low-pass filter through improvements of, for example, the frequency characteristics in the stopband.

Abstract: A diplexer (100) includes: first and second directional couplers (106A, 106B); and first and second filters (101A, 101B). The filters (101A, 101B) each include a plurality of resonators (110A to 150A, 110B to 150B) that are electromagnetically coupled. The resonators (110A to 150A, 110B to 150B) each have a broad wall that is in a shape of a circle or a regular polygon with six or more vertices, and two resonators, which are coupled together, of the resonators (110A to 150A, 110B to 150B) are arranged such that D<R1+R2 is satisfied, where R1 and R2 represent radii of circumcircles of the broad walls of the two resonators and D represents a center-to-center distance between the two resonators.

Abstract: A radio frequency circuit includes a filter of a Band A, a filter of a Band B, a filter of a Band C, a low pass filter that is connected between a common terminal and a first terminal, a high pass filter that is connected between the common terminal and a second terminal, and an impedance variable circuit. The frequency interval between the Band A and the Band B is smaller than the frequency interval between the Band A and the Band C. In CA of the Band A and the Band B, the filter is connected to the first terminal, the filter is connected to the second terminal, and an impedance of the low pass filter when viewed from the first terminal and an impedance of the high pass filter when viewed from the second terminal have a complex conjugate relationship.

Abstract: Present teachings relate to an antenna arrangement comprising, a first substrate comprising a first surface and a second surface, the first surface and the second surface being opposite sides of the first substrate, a second substrate comprising a third surface and a fourth surface, the third surface and the fourth surface being opposite sides of the second substrate, a patch antenna being realized in a first electrically conductive material attached to the first surface, a ground plane being realized in a second electrically conductive material attached to the second surface, and at least two feeds realized in a third electrically conductive material attached at least partially to the fourth surface. The patch antenna is arranged with respect to the ground plane so as to form a resonant antenna.

Abstract: A wireless communication device is described. The wireless communication device includes a processor, a memory in communication with the processor and instructions stored in the memory. The instructions are executable by the processor to detect a signal degradation indication for a radio frequency (RF) signal. The instructions are also executable by the processor to cause a switch to select a combination of a first matching network and a second matching network coupled to an antenna in response to detecting the signal degradation indication.

Abstract: An elastic wave device includes an impedance matching element, a switch that switches a connection state between a first switch terminal connected to the impedance matching element and second switch terminals, multiplexers connected to the second switch terminals, a substrate, and at least one inductor on the substrate and has an inductance smaller than an inductance of the impedance matching element. At least one of the second switch terminals and at least one of the multiplexers are connected with the first inductor interposed therebetween.

Abstract: Spatial power-combining devices and, in particular, spatial power-combining devices with filtering elements are disclosed. A spatial power-combining device includes a plurality of amplifier assemblies and each amplifier assembly includes an input antenna structure, an amplifier, an output antenna structure, and a filtering element. A filtering element may be an integral single component with an input signal conductor of the input antenna structure or an integral single component with an output signal conductor of the output antenna structure. In some aspects, a filtering element may be an integral single component with both the input signal conductor and the output signal conductor.

Abstract: Disclosed is a phase shifter capable of achieving 360° phase shifts. The phase shifter includes an active balanced-to-unbalanced (balun) circuit for splitting an input signal into two signals offset in phase. The phase shifter further includes an active all-pass network electrically coupled to an output of the active balun circuit. The active all-pass network can include an active tunable inductor. A variable-gain amplifier (VGA) is electrically coupled to an output of the active all-pass network.

Abstract: Disclosed is a directional coupler having a coupler, a forward resistive attenuator, a reflected resistive attenuator, a forward compensation capacitor, and a reflected compensation capacitor. A forward coupler side arm and reflected coupler side arm of the coupler are configured to obtain a sample of forward energy and a sample of reflected energy from the coupler transmission line section. The forward resistive attenuator and reflected resistive attenuator are configured to attenuate the sample of forward energy and the sample of reflected energy. The forward compensation capacitor and the reflected compensation capacitor are configured to receive the attenuated sample of forward energy and the attenuated sample of reflected energy and produce a frequency-compensated sample of forward energy and a frequency-compensated sample of reflected energy.

Abstract: Certain aspects of the present disclosure are generally directed to apparatus for attenuating unwanted frequencies using a feed line with integrated filtering. In certain aspects, a feed line for filtering unwanted frequencies in a wireless power transfer system is provided, the feed line including a first end, wherein the first end is configured to connect to a power source that generates a driving signal having a driving signal frequency, and a second end, wherein the second end is configured to connect to a wireless power transfer element configured to wirelessly transmit power. The feed line further includes a conductor core, wherein the conductor core is configured to transfer the driving signal from the power source to the wireless transfer element. The feed line further includes an integrated filter configured to attenuate at least one frequency generated by the wireless power transfer system.

Abstract: A transmit-and-receive module includes a multiplexer, a power amplifier, and a low-noise amplifier. The multiplexer includes a transmit filter and a receive filter. The power amplifier and the low-noise amplifier are integrated with each other. In a Smith chart, impedance in a receive band of the receive filter seen from a receive terminal intersects a line connecting a center point of noise figure circles and a center point of gain circles. The center point of the noise figure circles represents the impedance at which the noise figure of the low-noise amplifier is minimized. The center point of the gain circles represents the impedance at which the gain of the low-noise amplifier is maximized.

Abstract: A polarization waveguide network includes a reactive transmit (TX) power splitter and multiple receive (RX)-reject waveguide filters to reject RX frequencies. The polarization waveguide network further includes a quadrature junction coupler that can couple the RX-reject waveguide filters to an antenna port. The polarization waveguide network is configured to be fabricated in three pieces with two zero-current split planes, and a first piece of the three pieces is used for coupling to the antenna port.

Abstract: Reconfigurable front-end module for carrier aggregation. In some embodiments, a front-end module can include a plurality of signal ports and a plurality of antenna ports. The front-end module can further include a switch assembly configured to route signals along one or more of a plurality of filtering paths between the signal ports and the antenna ports. Each of the filtering paths can include a filter, and the filtering paths can be configured to allow the antenna ports to be combined outside of the front-end module to accommodate a corresponding antenna configuration. The filtering paths can be further configured to maintain desirable filtering performance levels for different combinations of the antenna ports outside of the front-end module corresponding to the different antenna configurations.

Abstract: The present invention discloses a band-pass filtering structure and an antenna housing. The band-pass filtering structure includes a functional layer structure, where the functional layer structure includes two or more first dielectric layers and a second dielectric layer that is disposed between two first dielectric layers, a plurality of first conductive geometric structures displayed in a periodical arrangement are disposed on the first dielectric layer, a plurality of second conductive geometric structures displayed in a periodical arrangement are disposed on the second dielectric layer, the first conductive geometric structure includes two crossly-disposed conductive strips, and the second conductive geometric structure is a closed conductive geometric structure. The present invention resolves a technical problem that filtering performance of an existing band-pass filter is poor due to unreasonable structural design.

Abstract: Exemplary embodiments are disclosed of HDTV antenna assemblies. In an exemplary embodiment, a high definition television antenna assembly generally includes a first antenna element and a second antenna element. The first antenna element has a generally annular shape with an opening. The second antenna element includes first and second arms spaced apart from the first antenna element. The first and second arms extend at least partially along portions of the first antenna element. The first and second antenna elements may be electromagnetically coupled without a direct ohmic connection between the first and second antenna elements.

Abstract: A full duplex system comprising a combiner with a first port connected to an antenna, a second port connectable to a source of a signal to be transmitted via the antenna, a third port for outputting a signal received via the antenna and a fourth port connected to a variable impedance. The variable impedance comprises a power splitter with an input connected to the fourth port and at least two outputs, wherein at least two outputs are connected to each other via variable phase shifting and attenuation circuitry.

Abstract: A radio frequency filter circuit (22A) includes a series-arm resonator (22s), a parallel-arm resonator (22p1), a parallel-arm resonator (22p2) that is connected between a node x1 and a ground terminal, a switch (22SW) that is arranged between the node x1 and the ground terminal and switches between electrical connection and electrical non-connection of a path connecting the node x1, the parallel-arm resonator (22p2), and the ground terminal. The parallel-arm resonator (22p1) and a series circuit in which the parallel-arm resonator (22p2) and the switch (22SW) are connected in series are connected in parallel between the node x1 and the ground terminal. A resonant frequency (frp) of the parallel-arm resonator (22p1) is lower than a resonant frequency (frs) of the series-arm resonator (22s). A resonant frequency (frp2) of the parallel-arm resonator (22p2) is higher than the resonant frequency (frp) of the parallel-arm resonator (22p1).

Abstract: In accordance with one or more embodiments, a system includes an array of antennas. A plurality of transceivers is configured to generate first signals, in response to control signals. A controller is configured to generate the control signals to control, via the plurality of transceivers, an antenna aperture of the array of antennas. The array of antennas is configured to generate, in response to first signals, radiated waves according to the antenna aperture of the array of antennas, the radiated waves inducing a first guided electromagnetic wave that is guided by a surface of a transmission medium and propagates along the transmission medium without requiring an electrical return path.

Abstract: A disclosure of the present specification provides a method for transceiving data in a next generation mobile communication system. The method may comprise a step of receiving system information from a base station. The system information may comprise: system band information; information regarding a first uplink center frequency and a second uplink center frequency for an uplink band within the system band; and information regarding a first downlink center frequency and a second downlink center frequency for a downlink band within the system band. The method may comprise: a step of receiving, from the base station, a control signal to change the downlink band to a second downlink center frequency; and a step of tuning a radio frequency (RF) unit in order to switch the downlink band from the first downlink center frequency to the second downlink center frequency.

Abstract: An RFIC with memory is described where the memory can be used to house a look-up table for tuning components designed into the RFIC, providing a customized tuning circuit for antenna and transceiver front-end tuning applications. The look-up table can be loaded at wafer level during the manufacturing process to customize an RFIC design for a specific antenna system. The memory can be used to restrict or tailor the tuning range of tunable capacitors and switches within the RFIC to optimize performance in the end application. The resident memory will improve signaling latency when tuning for time critical applications such as channel tuning in a cellular communication system.

Abstract: The present disclosure relates to a front-end module for a telecommunication device with an EBD circuit comprising a hybrid transformer for coupling via a transmit port to the telecommunication device transmitting a first frequency transmit signal, to an antenna, via a receive port to the telecommunication device receiving a second frequency receive signal, and to a tunable impedance circuit. In a first configuration the EBD circuit is configured to isolate the transmit port from the receive port at the first frequency, and the FEM comprises a first filter at the transmit port for attenuating the transmit signal with a predetermined amount at the second frequency. In a second configuration the EBD circuit is configured to isolate the transmit port from the receive port at the second frequency, and the FEM comprises a second filter at the receive port for attenuating the receive signal a predetermined amount at the first frequency.

Abstract: Hinge assemblies that serve as conduits for guiding extremely high frequency (EHF) signals are disclosed herein. The hinge assembly can contain EHF signal energy as data is transmitted from one structure to the other and the hinge assembly can also include a one or more waveguides that define EHF signal pathways through which EHF signal energy is directed. Each hinge assembly may serve as a conduit structure for each coupled pair of contactless communication units (CCUs), and multiple hinge assemblies may be used as separate conduit structures each of several coupled pairs of contactless communication unit.

Abstract: Communications receivers and devices are disclosed. A communications receiver includes a low noise amplifier; a multi-band transmit blocking filter having a first port connected to an output of the low noise amplifier, and an RF analog-to-digital converter having an input connected to a second port of the multi-band transmit blocking filter. The multi-band transmit filter passes the receive frequencies of a group of two or more LTE bands, where a first receive frequency range of a first band in the group and a second receive frequency range of a second band in the group are disjoint and not subsets of a receive frequency range of a third band in the group, and attenuates the transmit frequencies of at least some bands in the group by at least twenty dB.

Abstract: The present invention relates to various embodiments of a Radio-Frequency (RF) front-end for use in a receiver, a diversity receiver and a method for operating a diversity receiver.

Abstract: There is provided a duplexer having first, second and third ports and adapted for connection between an antenna and uplink and downlink, respectively, in a full duplex communication system. The duplexer has first and second quarter wave transformers connected between the first and third and between the first and second ports, respectively. The duplexer has a balancing resistor connected between the third port and the output of the second transformer. The duplexer has a filter circuit connected between the output of the second transformer and the second port.

Abstract: A filter device includes an antenna terminal to be connected to an antenna, first inductors connected between the antenna terminal and a ground potential and defined by parallel divided inductors, and first and second acoustic wave filters commonly connected to the antenna terminal and including second inductors, respectively. The first inductors and the second inductors are electromagnetically coupled to each other mainly in a one-to-one relationship.

Abstract: An inductor includes first and second wirings respectively formed in a substantially spiral shape on first and second surfaces of a multilayer substrate. The multilayer substrate includes plural dielectric layers stacked on each other in a predetermined direction. The multilayer substrate includes a first layer having the first surface, which is an end surface in the predetermined direction, and a second layer having the second surface within the multilayer substrate. The width of the second wiring is smaller than that of the first wiring. The first and second wirings are electrically connected in parallel with each other. The inductance of the first wiring and that of the second wiring are substantially equal to each other. When the first and second wirings are projected on the first surface in the predetermined direction, entirety of a projected image of the second wiring is contained within that of the first wiring.

Abstract: A multiplexing system can include a first diplexer and a second diplexer. The first diplexer can be configured to filter a first transmit signal received at the first transmit terminal to a first cellular frequency band and output the filtered first transmit signal at the first common terminal. The first diplexer can be further configured to filter a first receive signal to a second cellular frequency band and output the filtered first receive signal at the first receive terminal input. The second diplexer can be configured to filter a second transmit signal received at the second transmit terminal to the second cellular frequency band and output the filtered second transmit signal at the second common terminal. The second diplexer can be further configured to filter a second receive signal to the first cellular frequency band and output the filtered second receive signal at the second receive terminal.

Abstract: A signal isolation control apparatus for controlling duplexing of signals to be transmitted through and received from an antenna. The apparatus includes a transmitter chain tap input for coupling to a transmitter chain. An auxiliary transmitter chain is operably coupled to the transmitter chain tap input for processing a transitory signal tapped from the transmitter chain, the auxiliary transmitter chain including an adaptive filter unit and a balance node output for operably coupling to a balance node of a hybrid junction. The adaptive filter unit has a signal leakage monitoring input for operably coupling to an output node of the hybrid junction. The auxiliary transmitter chain is arranged to process the tapped transitory signal in order to generate and apply an isolation signal at the balance node output for maximizing isolation of an output node of the hybrid junction from an input node of the hybrid junction.

Abstract: Wireless communication circuitry is disclosed. The wireless communication circuitry includes an antenna terminal and an electrically conductive path between a first port terminal and the antenna terminal through a second port terminal. Also included is a bulk acoustic wave filter configured to filter and pass a desired radio frequency signal between the first port terminal and the second port terminal. Further included is a first magnetic coupling component that is electrically connected to the electrically conductive path and a resonant circuit made up of a capacitor and a second magnetic coupling component that is magnetically coupled to the first magnetic coupling component. The resonant circuit is tuned to suppress an undesired desired radio frequency signal that in some embodiments is the second harmonic of the desired radio frequency signal.

Abstract: An ‘L’ shaped dynamically configurable impedance matching circuit is presented herein. The circuit can include a series element and a shunt element. The shunt element in the L-shaped impedance matching circuit can be moved or modified based on the impedance of the circuit elements in electrical communication with each side of the impedance matching circuit. Thus, in some cases, the impedance matching circuit may be a flexible circuit that can be dynamically modified based on the environment or configuration of the wireless device that includes the impedance matching circuit.

Abstract: A radiofrequency exciter comprises a junction including an axial access intended to be connected to a horn antenna, at least four lateral accesses and at least four frequency filters that are associated with the four lateral accesses, respectively, the junction including, in series, a first coupling cavity equipped with two coupling slots that are able to sample a vertical polarization, and a second coupling cavity equipped with two coupling slots that are able to sample a horizontal polarization, the four frequency filters being connected directly to the four respective coupling slots, the first coupling cavity having a transverse cross-section having a constant vertical dimension and a horizontal dimension that decreases between the axial access and a transverse exit aperture of the first coupling cavity.

Abstract: The present disclosure describes a multi-band antenna having a horn configured to communicate signals in a first frequency band and a second frequency band, an in-line feed, and sidewall feeds. The in-line feed may be coupled to an in-line opening in the horn to communicate signals in the first frequency band. The horn may include first and second openings to communicate signals in the second frequency band. The sidewall feeds may have first and second side feeds respectively coupled to the first and second openings.

Abstract: A demultiplexing apparatus according to the present disclosure includes an amplifier that amplifies transmission signals in three or more communication bands having different frequency bands; multiple signal paths which are commonly provided for an output terminal of the amplifier and on which the signals in the corresponding communication bands are propagated; and multiple transmission-reception filters which are provided on the multiple signal paths, and each of which isolates a transmission signal and a reception signal of the corresponding communication band from each other. The gains of the amplifier in the frequency bands of multiple reception signals are smaller than the gains of the amplifier in the frequency bands of multiple transmission signals.

Abstract: A transmitter of a feed network includes first and second branches and an integrated branch line coupler that couples the first and second branches. The integrated branch line coupler includes first and second waveguide reject filters in the first and second branches respectively. The first and second waveguide reject filters include one or more single-sided stubs protruding outwardly from outer faces of the first and second waveguide reject filters. The integrated branch line coupler further includes one or more couplers that are coupled between inner faces of the first and second waveguide reject filters. The transmitter includes a core waveguide that is coupled to the first and second branches. The transmitter receives a linearly polarized signal from an input port of the first or second branches and generates a circularly polarized signal in the core waveguide.

Abstract: A technique relates to a superconducting microwave device. A left-handed resonator include at least one unit cell. A non-linear dispersive medium is connected to the left-handed resonator, such that one end of the left-handed resonator is connected to the non-linear dispersive medium and an opposite end of the left-handed resonator is connected to a port. The left-handed resonator and the non-linear dispersive medium are configured to output a quantum signal in a squeezed state.

Abstract: A plasmonic switching device and method of providing a plasmonic switching device. An example device includes a resonant cavity and an electromagnetic radiation feed arranged to couple electromagnetic radiation into the resonant cavity and at least one plasmonic mode. The resonant cavity is arranged to be switchable between: a first state in which the resonant cavity has an operational characteristic selected to allow resonance of the electromagnetic radiation at a frequency of the at least one plasmonic mode; and a second state in which the operational characteristic of the resonant cavity is adjusted to inhibit resonance of the electromagnetic radiation at a frequency of the at least one plasmonic mode.

Abstract: An elastic wave apparatus includes first and second bandpass filters and the first bandpass filter is a ladder elastic wave filter. The mounting substrate includes an inductor which is connected between at least one of parallel arm resonators and a ground potential, a signal wiring at a hot side, which is connected to the first bandpass filter, and a ground wiring. When the mounting substrate is viewed from a side of a surface on which the elastic wave filter chip is mounted, a portion of the inductor overlaps with a portion of the signal wiring and a slit defining a wiring missing portion in which the ground wiring is absent in the ground wiring is provided in the overlapped portion.

Abstract: An RF filter includes: an electrical conductor defining an outer sphere; a dielectric material defining an inner sphere disposed within the conductor outer sphere; and at least a first electrical probe and a second electrical probe. Each probe extends through the conductor and is electrically insulated from it. A spherical shape of one or both of the inner and outer spheres is interrupted by: a) a first localized discontinuity in said spherical shape disposed along a first axis passing through a geometric center of the one or both of the inner and outer spheres; and b) a second localized discontinuity in said sphere form disposed along a second axis passing through the geometric center, the second axis perpendicular to the first axis. There can be more than these two discontinuities, implemented as chamfers, tuning screws, and the like. Series and parallel coupling of the spheres is detailed.

Abstract: At least one of a transmission filter and a reception filter of a duplexer includes a piezoelectric substrate, an elastic wave filter electrode portion on the piezoelectric substrate and including ground terminals to be connected to a ground potential, a support layer provided on the piezoelectric substrate, a cover provided on the support layer to seal a cavity in the support layer, and via hole electrodes penetrating the support layer and the cover and including first and second ends. The ground terminals are commonly connected on the piezoelectric substrate, and the ground terminals are electrically connected to the respective first ends of the plurality of via hole electrodes. The second ends of the via hole electrodes are connected to the ground potential outside of the at least one of the transmission filter and the reception filter.

Abstract: A filter component with a passive element includes a filter substrate, an elastic wave filter including an elastic wave resonator in a predetermined region of one main surface of the filter substrate, and a support substrate on another main surface of the filter substrate, wherein a passive element is provided in or on a support substrate, the passive element includes a wiring electrode and is electrically connected to the elastic wave filter.

Abstract: A method, system, and device for downlink transmission. A downlink signal is sent to a UE in an available frequency band of an uplink frequency band, and no signal is sent or received in a guard frequency band of the uplink frequency band, where the guard frequency band is located in a highest-frequency part and/or a lowest-frequency part of the uplink frequency band. Because no signal is sent or received in the guard frequency band of the uplink frequency band, interference to communication of a UE in an adjacent frequency band is reduced when the uplink frequency band is occupied for downlink transmission, thereby improving system performance.

Abstract: A system having a tunable impedance network and a method of tuning a tunable impedance network are disclosed. In one aspect, a telecommunications device comprises an electrical-balance duplexer (EBD) circuit coupled to at least one output node of a transmit path (TXin), an antenna, and at least one input node of a receive path (RXout), wherein the EBD circuit is configured to isolate the transmit path from the receive path by signal cancellation, and a balancing network (Zbal) as part of the EBD circuit. In one embodiment, the balancing network is an integrated tunable impedance network configured to provide an impedance that matches a target impedance (Zant) associated with the antenna at a first frequency and simultaneously at a second, different frequency. The network comprises a first portion and a second portion, the first portion reducing the influence of the tuning of the second portion at the first frequency. In some embodiments, the network preferably comprises no explicit resistors.

Abstract: In one embodiment, interconnect element (IE) circuitry electrically interconnects electronic components (e.g., a transceiver and a filter or a filter and an antenna). The IE circuitry has an inductive signal path and a grounded, inductive return path, where at least one actively controlled impedance-compensation element, electrically interconnecting the signal and ground paths, is controllable to selectively provide different impedance levels, such that overall impedance of the IE circuitry is controllable to achieve low pass-band insertion loss and high stop-band attenuation between the electronic components without requiring expensive RF connectors to connect the IE circuitry to the electronic components and an RF filter to provide stop-band attenuation. In a T-filter configuration, the IE circuitry has only one impedance-compensation element; in a Pi-filter configuration, the IE circuitry has two impedance-compensation elements.

Abstract: A multiplexer with excellent electrical properties and a low number of electrical components is provided that may be used in a communication device with two TX paths and two RX paths. The multiplexer comprises three hybrids and two duplexers. Further, a mobile communication device comprising such a multiplexer is provided.