Abstract: A simplified digital implementation of a fourth order Linkwitz-Riley crossover network is provided using approximations and transformations of the classical form. The approximation is particularly beneficial when the crossover frequency is low relative to the digital sampling rate, such as when an audio stream is split between bass and treble at about 30-300 Hz and the sampling frequency is about 100 times the cutoff frequency or higher. Rather than merely cascading two sets of second order filters, such as Butterworth filters, a fourth order transfer function is more directly implemented. Conventional transfer functions are simplified through approximations resulting in the elimination of all except one parameter, c, which is a linear function of the cutoff frequency. Additionally, multipliers are moved in line with the integrator elements.

Abstract: A high frequency module incorporates a layered substrate. The layered substrate has a bottom surface and a top surface. Terminals are disposed on the bottom surface. SAW filters and inductors are mounted on the top surface. The layered substrate incorporates: a first conductor layer connecting the SAW filters to the inductors; a second conductor layer connected to the terminals and disposed at a location closer to the bottom surface than the first conductor layer; and a plurality of parallel signal paths each of which is formed using at least one through hole provided inside the layered substrate and each of which connects the first and second conductor layers to each other.

Abstract: A small-sized, high-performance transmission circuit is provided which avoids degradation in transmission line characteristics caused by coupling, due to a transmission line and a leader electrode to an external electrode which are oppositely facing, of the electromagnetic field induced by the transmission line and the electromagnetic field induced by the leader electrode. In order to attain the aforementioned object, the present invention comprises a first shield layer which is a first ground electrode, a second shield layer which is a second ground electrode, and a spiral-shaped transmission line facing the first shield layer and the second shield layer which is disposed between the first shield layer and the second shield layer. The spiral portion of the transmission line, when viewed from the top face or the bottom face of the transmission line, is disposed on the inside of the first shield layer and the second shield layer.

Abstract: A high-frequency module is integrally formed from at least some circuit components defining a first wireless system using a first frequency band and at least some circuit components defining a second wireless system using a second frequency band. The high-frequency module includes a multilayer substrate including a plurality of stacked dielectric layers, a first terminal group disposed on a first surface of the multilayer substrate, where a plurality of terminals are arranged along a first side of four sides defining the first surface, and a second terminal group disposed on the first surface, where a plurality of terminals are arranged along a second side that is different from the first side. The first terminal group includes a first antenna terminal of the first wireless system whereas the second terminal group includes a second antenna terminal of the second wireless system.

Abstract: This invention provides a novel electronically tunable active duplexer for wireless transceiver applications. It relates to an active duplexer with full-duplex operation, permitting simultaneous transmission and reception of signals at same or different frequencies. It incorporates varactors, instead of fixed or mechanically adjustable capacitors, in phase shifting networks enabling one to electronically tune, with ease and precision, the frequency at which isolation is desired, over a band in both transmit and receive modes of operations. It can be implemented as a Monolithic Microwave Integrated Circuit (MMIC).

Abstract: A duplexer is described herein. The duplexer includes a transmission branch configured to allow passage of signals in a transmission band. The duplexer also includes a reception branch configured to allow passage of signals in a reception band. The duplexer also includes a band rejection filter in the transmission branch configured to produce a short circuit to an electrical ground in a stopband. The stopband at least partially overlaps the reception band.

Abstract: The present invention concerns a frequency diplexer with an input port and a first and a second output ports, comprising two directional couplers (14 and 15), an unique filter (16) that entails either a first or a second frequency response, and, a first and a second T splitters (19, 40).

Abstract: A frequency division coupling circuit includes first and second trace segments and first and second segregation modules. The first and second trace segments function to convey a first signal in a first frequency range and the first trace segment conveys a second signal in a second frequency range. A first port of the first segregation module transmits or receives the first signal to or from the first and second trace segments and a second port of the first segregation module transmits or receives the second signal to or from the first trace segment. A first port of the second segregation module transmits or receives the first signal to or from the first and second trace segments and a second port of the second segregation module transmits or receives the second signal to or from the first trace segment.

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: An elastic wave duplexer includes a transmission filter chip and a reception filter chip each defined by an elastic wave filter chip and flip-chip bonded to a laminated board. A coil-shaped line including coil-shaped line patterns is provided inside the laminated board. The coil-shaped line defines an impedance matching circuit. In plan view, the transmission filter chip is disposed on one side of a center line passing through the approximate center of the laminated board and extending between a first edge and a second edge, and the reception filter chip is disposed on the other side of the center line. The coil-shaped line is disposed on the side on which the reception filter chip is disposed.

Abstract: A circuit and antenna arrangement includes a diplexer having a single radio frequency input/output interface and dual feed connections with an antenna adapted for use over a plurality of frequency bands. The diplexer has a capacitance connected between the radio frequency input/output interface and the antenna, and further has an additional capacitance that is selectively one of connected or not connected in parallel with the capacitance. In one embodiment the additional capacitance may be a capacitor in series with a switch, while in another embodiment the additional capacitance may be a MEMS variable capacitor.

Abstract: The present invention provides a triplexer circuit obtaining an impedance matching in each of frequency bands with a simple configuration and separating a signal excellently. Three filters are connected in parallel with each other and, for signals in a pass frequency band of one of the filters, the other two filters form a parallel resonant circuit. In this case, the total impedance of the whole parallel resonant circuit becomes infinite (?) and the other two filters can be made open to the pass frequency band of the one filter. With the simple configuration in which the three filters are connected in parallel with each other, an impedance matching is obtained in each of the frequency bands, and excellent signal separation can be performed.

Abstract: An electronic circuit, an RF signal power amplifier circuit, and an integrated circuit provide for combining two radio frequency signals. These circuits include, among other things, capacitors (276, 282) that provide an elliptic section. This elliptic section simultaneously allows for filtering and reduction in required values for first and second inductors (248, 272), respectively. For example, the filtering provided by the capacitors (276, 282) allows for the harmonic of the combining frequency to be filtered out. This allows a designer to compensate for additional loss experienced by the circuit (200) by reducing filtering from sections that follow the circuit (200).

Abstract: A transceiver allowing transmission of a co-polar transmit signal and simultaneous reception of co-polar receive and cross-polar receive signals. An integrated orthogonal mode transducer and diplexer module containing a plurality of filters between a feed port, co-polar transmission port, co-polar reception port and cross-polar reception port is mounted within the transceiver housing with the feed port aligned with or forming the feed flange of the transceiver. A transmitter printed circuit board is aligned with the transmission waveguide port and a receiver printed circuit board is aligned with the co-polar reception and cross-polar reception ports of the integrated orthomode transducer and diplexer module.

Abstract: A terminal is provided for selectively communicating in at least two frequency bands. The terminal includes an antenna transducer including a first port and a second port, where the antenna transducer is capable of selectively transducing first radio signals (e.g., low power radio frequency (LPRF) signals) to and/or from the first port, and/or second radio signals (e.g., global positioning system (GPS) signals) to and/or from the second port. In this regard, the antenna transducer is capable of transducing first radio signals such that an impedance at the second port approaches a short circuit or an open circuit, and capable of transducing second radio signals such that an impedance at the first port approaches an open circuit. An associated communication assembly and method for selectively communicating in at least two frequency bands are also provided.

Abstract: A high frequency electronic component comprises a layered substrate. On the bottom surface of the layered substrate, there are provided a plurality of functional terminals for inputting and outputting signals relating to functions of a circuit inside the layered substrate, a plurality of ground terminals, a plurality of terminals that are not connected to external circuits, and a conductor section for grounding. The conductor section for grounding includes: a center portion located in a region surrounded by a plurality of terminals; and a plurality of coupling portions for coupling the center portion to the terminals.

Abstract: An electrical circuit includes an antenna connection for receiving a signal, a first signal path connected to the antenna connection, a filter arranged in the first signal path, and a first and a second gate circuit connected in series. The first gate circuit is connected to the antenna connection, and the second gate circuit is arranged between the first gate circuit and the filter. The first and second gate circuits each includes an impedance transformer arranged in the first signal path and a shunt circuit connected to ground. The shunt circuit includes a switch element and a capacitor. When the switch element is enabled, the shunt circuit defines a ground path through which at least part of the signal can pass to ground.

Abstract: A filter for use with bulk acoustic waves includes an input port and an output port. The input port and the output port are symmetrically operable. Signal paths extend from a terminal of the input port to a terminal of the output port. Bulk acoustic wave resonators are in the signal pats. The bulk acoustic wave resonators are arranged symmetrically in the signal paths. A complex impedance associated with each signal path is provided for electrically matching to a corresponding connection.

Abstract: According to one aspect, the subject matter described herein includes a tunable duplexer. The tunable duplexer can include a common node for communicating signals comprising a plurality of frequencies. Further, the tunable duplexer can include first and second band nodes for communicating first and second predetermined frequency bands, respectively, of the plurality of frequencies. The tunable duplexer can also include a filter coupled between the common node and the first and second band nodes. The filter can include pole-zero elements adapted to pass signals of the first and second predetermined frequency bands to the first and second band nodes, respectively. Further, the filter can be adapted to block signals of the first and second predetermined frequency band to the second and first band nodes, respectively.

Abstract: A monolithic integrated circuit for performing power dividing and power monitoring functions is disclosed. The monolithic integrated circuit includes a power dividing portion for dividing radio frequency (RF) signal power and a power monitoring portion for monitoring the RF signal power. In one example, the monolithic integrated circuit is a microwave monolithic integrated circuit (MMIC) for use in high-frequency applications within microwave and millimeter-wave frequency range.

Abstract: A dual mode antenna switch module (ASM) comprises a UMTS TX port; a UMTS RX port; and a UMTS duplexer, comprising a common port, a TX port coupled to the UMTS TX port and an RX port coupled to the UMTS RX port. The ASM further comprises an antenna port; at least one GSM TX port; and at least one GSM RX port. A multi-port switch has respective ports coupled to the antenna port, the at least one GSM TX port, the at least one GSM RX port, and the common port of said UMTS duplexer. The common port of said duplexer has a reflection co-efficient at said connected multi-port switch port with a magnitude in the range 0.8 to 1.0 and with a phase, ?, where ?210°??n×360??150° where N is an integer.

Abstract: A multilayer chip-type triplexer is provided. It uses four-session matching transmission lines to integrate three band-pass filters at different frequency bands for simplifying triplexer design. A band-pass filter may be composed of a two-stage combline band-pass filter. The transmission zero generated by the two-stage combline band-pass filter is to increase the isolation and performance of the triplexer. The triplexer uses low-loss materials to reduce the insertion loss of the circuit Moreover, a multilayer structure is adopted to minimize the size of the triplexer. The triplexer is applicable to multiband radio-frequency modules, and meets the multimodule requirement for wireless communication products.

Abstract: A high frequency module comprises a switch circuit connected to two antenna terminals and two diplexers connected to the switch circuit. Each of the diplexers incorporates two band-pass filters (BPFs). Each of the diplexers further incorporates a capacitor provided between one of the BPFs and a node of signal paths and another capacitor provided between the other of the BPFs and the node.

Abstract: A frequency separating unit includes an antenna unit, a first signal path, a second signal path, a first band-pass filter in the first signal path, a second band-pass filter in the second signal path, and a matching circuit between the antenna unit and the second band-pass filter in the second signal path. The matching circuit includes a shunt arm to ground that includes a first impedance component, and a parallel circuit that includes an acoustic wave resonator and a second impedance component. The matching circuit in configured to operate as a phase shifter and to produce a substantially open circuit at an input of the second filter in a pass band of the first band-pass filter.

Abstract: A matching circuit includes a demultiplexer for demultiplexing a signal outputted from an amplification device into signals of respective frequency bands, and at least two matching blocks which are connected to the demultiplexer, are respectively fed with the signals of the respective frequency bands, and perform impedance matching in the respective frequency bands of the inputted signals. Impedance matching is performed on each of the demultiplexed signals of the respective frequency bands, thereby achieving a matching circuit capable of efficiently performing impedance matching in the respective frequency bands. With this matching circuit, it is possible to achieve a multi-band amplifier capable of simultaneously amplifying signals of multiple frequency bands with high efficiency and low noise.

Abstract: A waveguide diplexer having an electric plane T-junction structure with a resonant iris is disclosed. The waveguide includes: a waveguide having a predetermined shaped cross section; a transmitting filter for preventing to generate a harmonic band and a higher mode in a receiving band by changing impedance to have a low pass characteristic inside the waveguide; a receiving filter for minimizing an insertion loss by changing impedance to have a bandpass characteristic inside the waveguide; an electric plane T-junction for isolating/combining a transmitting signal and a receiving signal without electric interference by connecting the transmitting filter and the receiving filter, and minimizing interference of a frequency transmitted/received through the transmitting filter and the receiving filter; and an impedance converter for differentiating a transmitting port and a receiving port with minimum electric interference to the transmitting filter and the receiving filter by changing the impedance.

Abstract: A bandpass filter comprises a number of resonators which are arranged between an input and an output of the filter and which are interconnected to form at least two main signal paths that lead from the input to the output. The at least two main signal paths have overlapping passbands and are connected to the input and/or output via different resonators.

Abstract: One aspect of the invention provides a signal separating device comprising a first and a second circuit branch connected to an antenna port, the first circuit branch comprising a filter for passing signals in a first frequency band, and the second circuit branch comprising a filter for passing signals in a second frequency band. The first and second circuit branches being arranged so that a respective reactive impedance is presented to the antenna port in both said first and said second frequency bands. The device further comprises an impedance matching circuit at the antenna port arranged to substantially to cancel out the respective reactive impedances. In the preferred embodiment, each circuit branch presents a respective shunt capacitance to the antenna port when out-of-band and the matching circuit comprises a shunt inductor at the antenna port.

Abstract: Methods and apparatus are provided for efficiently coupling singly terminated networks with doubly terminated networks. An isolation network is disposed between a singly terminated network and a doubly terminated network. The isolation network is a three terminal device having an input terminal connected to the output of the singly terminated network and having an output terminal connected to the input of the doubly terminated network. An isolation terminal is provided that receives and dissipates energy reflected from the input of the doubly terminated network, such that substantially no energy is received or seen by the output of the singly terminated network.

Abstract: The duplexer includes a transmit filter connected between an antenna terminal and a transmit terminal, and a splitter circuit and a receive filter connected in series between the antenna terminal and the receive terminal. The splitter circuit includes at least one phaseline connected between the antenna terminal and the receive filter and at least one resonator connected in parallel with the phaseline. According to the present invention, the length of the phaseline can be made shorter, so the entire duplexer can be made more compact in size. In addition, an inductors are preferably connected between each ends of the phaseline and the resonator. In this case, the inductance of a wire or via formed within the package can be used.

Abstract: A system for connecting at least two receivers to a common antenna is proposed, antenna signal lines being supplied to the receivers, which stands out in that the input impedances of the at least two receivers are matched only in a narrow-band fashion in the range of their current reception frequencies to the impedances of the antenna signal lines supplied to them. An antenna signal splitter is also proposed. Finally, a method for controlling the reception frequencies of at least two receivers connected to a common receiving antenna is proposed, which is distinguished by the fact that the reception frequencies of the at least two receivers are set in such a way that they maintain a predefined minimum frequency distance from one another. A reduction of an antenna signal attenuation in an antenna signal splitter for multiple receiver systems is thereby possible, provided the receivers are tuned to different reception frequencies.

Abstract: A dual band full duplex mobile radio is provided that includes a transmit portion including a dual band filter and a receive portion including a dual band filter. The dual band full duplex mobile radio further includes a circulator connecting the transmit portion and the receive portion and configured to provide transmit and receive switching.

Abstract: The method and apparatus herein identifies tunable duplexer in a communication system. The tunable duplexer includes a tunable receiver filter, a tunable transmitter filter, a variable receiver phase shifter, and variable transmitter phase shifter. Each filter and phase shifter is optimized based on characteristics of impedance within the duplexer. The duplexer may be adjusted to changing environments or desired changes in the frequency of operation, reducing circuitry architecture and providing greater flexibility in communication function. The method commences by tuning tunable filters within the duplexer and then optimizing phase shifters within the duplexer for adjusting impedance matching with antenna and isolating the receiver from the transmitter during duplexing operations. Optimizations and calibration may be performed during manufacture, upon initialization of the system, or during operation of the communication device.

Abstract: The invention provides a composite high frequency component constituting a part of a microwave circuit having plural signal paths corresponding to their respective frequencies, comprising: a diplexer for coupling transmitting signals from the plural signal paths for transmission and distributing receiving signals into said plural signal paths for reception; plural high frequency switches for separating the plural signal paths into a transmission section and a reception section, respectively; plural filters introduced in the signal paths; said diplexer, said high frequency switch, and said filters being integrated into a ceramic multi-layer substrate formed by lamination of plural ceramic sheet layers. According to the above described composite high frequency component, the diplexer, the high frequency switches, and the filters which constitute the composite high frequency component are integrated into the ceramic multi-layer substrate formed by lamination of plural ceramic sheet layers.

Abstract: A system and method for providing auxiliary reception in a wireless communications system includes a wireless communications device. The wireless communications device includes a first antenna and a second antenna. The wireless communications device can, for example, establish two-way communications with a wireless communications network. The wireless communications device can also use the second antenna in at least one of a mobile assisted hand off (MAHO), a diversity antenna system and a global positioning system (GPS) system.

Abstract: The present invention provides an antenna duplexer comprising a package having a plurality of ceramic layers superposed, and a transmitting filter and a receiving filter which are mounted on a surface of the package. A phase-matching strip line is formed on a surface of one ceramic layer. The package has grounding layers formed respectively on surfaces of upper and lower ceramic layers with the phase-matching strip line interposed therebetween. A plurality of via holes are formed around the phase-matching strip line for connecting the two grounding layers to each other.

Abstract: The present invention is a modular frequency division filter having an antenna port that connects to two or three transmission paths. Each transmission path includes either a band pass filter or a duplexer to separate the received signal by frequency. Frequency phase shifters or shunt inductors may be included to further enhance the frequency separation. Following frequency separation, the separated signal is transceived by a device operating at the respective separated frequency.

Abstract: A polar loop transmitter includes separate phase and envelope paths providing a linearising scheme for an efficient non-linear power amplifier. Loop filters are included in each of the phase and envelope paths to enable the path characteristics to be matched to one another. A polar loop transmitter and other types of envelope elimination and restoration transmitters control the output envelope of the power amplifier by connecting the output of the envelope detector, or in an envelope feedback transmitter, the envelope error signal, to the bias control input of the power amplifier. The transmitter can further include compensation means for compensating for non-linearities in the envelope control means and a loss of feedback control detector to ensure that the feedback signal remains within acceptable limits.

Abstract: An antenna duplexer including: a transmission filter, a reception filter, phase-shift circuits of adjusting phase characteristics on a transmission side and a reception side; and a junction point of connecting an antenna, wherein (1) an absolute value ?1 of a difference between a first phase at a predetermined frequency of a pass band of the first filter and a second phase at the predetermined frequency at the time when the reception filter side is viewed from the junction point and (2) an absolute value ?2 of a difference between a third phase at a predetermined frequency of a pass band of the reception filter and a fourth phase at the predetermined frequency at the time when the transmission filter side is viewed from the junction point is included in a range of 100 degrees or more and 170 degrees or less.

Abstract: Multi-tuner receivers with cross talk reduction are disclosed. In one embodiment, a multi-tuner receiver with cross talk reduction includes a low noise amplifier, a set of interstage filters and a set of corresponding tuners. In an alternative embodiment, a multi-tuner receiver with cross talk reduction includes a passive splitter, a set of interstage filters and a set of corresponding tuners. The interstage filters can be low-pass, high-pass or band-pass filters depending on the particular frequency range of interest. Typical embodiments can have two or three tuners, however, the invention applies to multi-receiver tuners with more than three tuners. The multi-tuner receivers can be used within television, cable set top boxes and other devices that receive multiple video signals.

Abstract: A high-frequency module is connected to a transmitting circuit, a receiving circuit, and an antenna to control the connections between the transmitting circuit and the antenna and between the receiving circuit and the antenna. The module includes means for controlling transmitted signals, which includes a first phase-shift circuit and a high-frequency amplifier provided between the antenna and the transmitting circuit. The high-frequency amplifier and the first phase-shift circuit are integrated into a module composed of a plurality of dielectric layers.

Abstract: A legacy support block interfaces a shared antenna system with existing base station equipment of a service provider. Processing circuitry includes digital-to-analog converter circuitry, analog-to-digital converter circuitry, a local oscillator, and mixers. A shared backhaul interfaces with the shared antenna system further consolidating of cell site equipment.

Abstract: A high-frequency compound switch module of this invention has a first communication system comprising a switch unit for switching connection of a signal from an antenna to one of a transmission circuit and a reception circuit of the first communication system based on a signal from a control terminal, a filter provided on a first reception circuit side, for filtering out a first reception signal, and a first phase shift line provided between the filter and the switch unit, and a second communication system comprising a second phase shift line provided between the switch unit and the first phase shift line, and a branching filter provided in series to the second phase shift line for branching a signal from the second phase shift line into a second transmission signal and a second reception signal. The switch module is capable of performing at least a receiving process of the first communication system while performing transmission/reception with the second communication system.

Abstract: A power line communication system comprises an indoor power line and one or more power line branching apparatuses connected to the indoor power line. The power line branching apparatus comprises a communication channel that is branched off from the indoor power line and connectable to a power line communication device, and a power supply channel that is branched off from the indoor power line and connectable to electrical equipment. The power line branching apparatus further comprises an impedance matching circuit and a normal mode filter circuit. The impedance matching circuit is provided on the power supply channel, and sets the impedance of the indoor power line to a predetermined value. The normal mode filter circuit is provided on the power supply channel, and reduces normal mode noise occurring from the electrical equipment connected to the power supply channel.

Abstract: A duplexer includes a transmitting filter and a receiving filter which are connected in parallel to an antenna terminal, and a matching circuit connected between the antenna terminal and at least one of the transmitting filter and the receiving filter. A portion of the matching circuit defines a trap circuit for harmonic suppression.

Abstract: A wireless communication device is configured for tri-band communication. One of the bands can be for GPS operation. The wireless communication device can comprise an antenna configured to transmit and receive communication signals over two communication bands and to receive GPS signals over a GPS communication band, and a triplexer electrically coupled with the antenna. The triplexer comprises a filter or filters configured to operate at a low frequency band, a filter or filters configured to operate at a mid frequency band, and a filter or filters configured to operate at a high frequency band.

Abstract: The invention relates to a terminal for communication with data supports which function in a non-contact manner, comprising a transreceiver circuit with two resonant circuits with antenna and condenser for the emitting of two radio frequency fields of different carrier frequencies, whereby the common antenna (A) for both resonant circuits comprises a winding.

Abstract: A duplexer includes a transmission band filter and a reception band filter connected in parallel to each other and connected to an antenna terminal. The transmission band filter and the reception band filter are accommodated in a package covered with an electroconductive lid. The package is mounted on a mounting substrate having the antenna terminal and covered with an electroconductive shield mounted on the mounting substrate. At least one of the transmission band filter and the reception band filter has a ground terminal connected to the lid. The lid is electrically connected to the shield.

Abstract: Disclosed is a matching circuit of a laminated duplexer connected to an antenna terminal while being connected between transmitting and receiving filters to match the transmitting and receiving filters with the antenna terminal, the matching circuit being configured to reduce the physical length of each conductor pattern thereof, thereby being capable of achieving an improved miniaturization thereof. The matching circuit includes a transmitting matching unit constituted by a conductor pattern electrically connected to an antenna electrode connected to the antenna terminal while being electrically connected to the transmitting filter, a first ground electrode vertically spaced apart from the conductor pattern, a receiving matching unit constituted by a conductor pattern electrically connected to the antenna electrode and the receiving filter, and a second ground electrode vertically spaced apart from the conductor pattern of the receiving matching unit.

Abstract: A system and method for providing a global positioning system (GPS) enabled antenna system are provided. The GPS enabled antenna may be used, for example, on a wireless communications device such as a wireless handset. The wireless communications device includes a GPS switching module coupled to a conventional communications antenna, including its associated circuitry. The GPS switching module is adapted to selectively couple the communications antenna to GPS matching circuitry. In this arrangement, the GPS matching circuitry adjusts impedance at approximately 1575 MHz to more closely match the communications antenna to GPS circuitry in the wireless device.