Abstract: The planar multi-directional antenna mainly contains a flat casing and a double-layered circuit board housed inside the casing. The circuit board's two major sides are patterned in a symmetrical manner and traces are routed and extended along the circumference of the circuit board for producing multi-directional reception field pattern. A raised metallic plate is configured in the center on a first major side for avoiding the coupling effect from current converging in the center and for overcoming the dielectric loss by using air. A ferrite core is configured at the feeding terminal of the antenna as a means of impedance conversion. A SMD inductor and a SMD capacitor are provided on the other major side for increasing the antenna's capability of receiving signals of larger wavelength.

Abstract: A radio frequency IC device includes a radio frequency IC chip, a feeder circuit substrate, and a radiating plate. The feeder circuit substrate includes a feeder circuit that electrically connects to the radio IC chip and that includes a resonance circuit and/or a matching circuit including inductance elements. The feeder circuit substrate is bonded to the radiating plate, which radiates a transmission signal supplied from the feeder circuit and supplies a received signal to the feeder circuit. The inductance elements are arranged in spiral patterns wound in opposite directions and couple to each other in opposite phases. The radio frequency IC device is able to obtain a radio frequency IC device that is not susceptible to being affected by a usage environment, minimizes variations in radiation characteristics, and can be used in a wide frequency band.

Abstract: An improved GPS mast module is characterised by the following features: the GPS mast module may be connected in a HF main transmission line (7, 107) between a base station (BS) and an antenna assembly (ANT), in particularly a mobile radio installation, and the satellite signals from an internal or connectable GPS antenna (GPS-ANT) can be supplied by a directional coupler (23) to the HF main path (7, 107).

Abstract: A wireless communication terminal including an antenna that supports first and second frequency bands, an RF circuit connected to the antenna; a shunt circuit connected between a connection point of the antenna and the RF circuit, and a ground, and a control unit that controls the shunt circuit.

Abstract: A dual- or quad-ridged horn antenna with an embedded impedance matching network is provided herein. According to one embodiment, the horn antenna may include at least one pair of ridges arranged opposite one another for guiding an electromagnetic wave there between. A transmission line is coupled to a first one of the ridges for supplying power to, or receiving a signal from, a feed region of the horn antenna. To reduce impedance mismatches between the transmission line and the ridges, an impedance matching network is embedded within a second one of the ridges at the feed point. The impedance matching network reduces impedance mismatch and extends the operational frequency range of the horn antenna by providing a sufficient amount of series capacitance between the transmission line and the ridges at the feed region. As set forth herein, the impedance matching network is preferably implemented as an open-circuit transmission line stub or capacitive stub.

Abstract: A ladder type filter includes series resonators S1˜S4 connected in series between an input terminal In and an output terminal Out, parallel resonators P1˜P3 connected in parallel between the input terminal In and the output terminal Out, a resonator RP connected in series with the series resonators S1˜S4 between the input terminal and the output terminal, the resonator RP having a resonance frequency lower than resonance frequencies of the series resonators S1˜S4, and an inductor Lp connected in parallel with the resonator. According to the present ladder filter, signals having frequencies away from the pass band can be suppressed by an attenuation pole formed by the inductor. It is further possible to suppress the insertion loss in the pass band by the resonator.

Abstract: A communication system includes the following elements: a transmitter including a transmission circuit unit configured to generate an RF signal for transmitting data and an EFC antenna configured to transmit the RF signal as an electrostatic field or an induced electric field; a receiver including an EFC antenna and a reception circuit unit configured to receive and process the RF signal received by the EFC antenna; and an impedance snatching unit configured to make an impedance of the EFC antenna of the transmitter equal to an impedance of the EFC antenna of the receiver. The RF signal is transmitted by electric-field coupling between the EFC antennas, facing each other, of the transmitter and the receiver.

Abstract: A transmission line structure for propagating electromagnetic energy includes a transmission line conductor trace, a first dielectric foam layer and a second dielectric foam layer. The conductor trace is sandwiched between the first foam layer and the second foam layer. A first ground plane layer and a second ground plane layer sandwich the first foam layer, the conductor pattern and the second foam layer.

Abstract: Aspects of a method and system for using a transformer for FM transmit and FM receive functionality may include communicating data-bearing signals via primary windings of a transformer, wherein secondary windings of the transformer may be utilized for receiving and/or transmitting the communicated data-bearing signals, wherein the secondary windings may be utilized as a load for the transmitting. The secondary windings and/or a power amplifier may be biased for the transmitting by applying an electrical signal at a terminal of the secondary windings, wherein the electrical signal that may be applied at the center terminal may be a biasing voltage. The receiving and the transmitting may be operated in time division duplex mode, or simultaneously. DC signal components for the receiving may be blocked by using a plurality of capacitors.

Abstract: A communication system includes the following elements: a transmitter including a transmission circuit unit configured to generate an RF signal for transmitting data and an EFC antenna configured to transmit the RF signal as an electrostatic field or an induced electric field; and a receiver including an EFC antenna and a reception circuit unit configured to receive and process the RF signal received by the EFC antenna. The EFC antennas of the transmitter and the receiver each include a coupling electrode and a resonating section including a distributed-constant circuit configured to strengthen electrical coupling between the coupling electrodes. The RF signal is transmitted by electric-field coupling between the EFC antennas, facing each other, of the transmitter and the receiver.

Abstract: A programmable antenna assembly includes a configurable antenna structure, a configurable antenna interface, and a control module. The configurable antenna structure includes a plurality of antenna elements that, in response to an antenna configuration signal, are configured elements into at least one antenna. The configurable antenna interface module is coupled to the at least one antenna and, based on an antenna interface control signal, provides at least one of an impedance matching circuit and a bandpass filter. The control module is coupled to generate the antenna configuration signal and the antenna interface control signal in accordance with a first frequency band and a second frequency band such that the at least one antenna facilitates at least one of transmitting and receiving a first RF signal within the first frequency band and facilitates at least one of transmitting and receiving a second RF signal within the second frequency band.

Abstract: Provided is a bandpass filter which can cope with a wide band and has a large degree of freedom in designing a pass band. Provided also are a radio communication module and a radio communication device using the bandpass filter. The bandpass filter includes a first, a second, and a third resonator (10, 20, 30). The first and the third resonator (10, 30) have a resonance frequency f1 while the second resonator (20) has a resonance frequency f2 which is different from f1. If fe is the even-number mode resonance frequency of a resonance system formed by the first and the third resonator (10, 30) and fo is the odd-number mode resonance frequency, f2 is lower or higher than both of fe and fo. The bandpass filter has a pass band including fe, fo, and f2.

Abstract: An REID antenna assembly configured to be energized with a carrier signal is disclosed. The REID antenna assembly includes an inductive component including a loop antenna assembly, at least one capacitive component coupled to the inductive component, and an eddy current trap positioned a predetermined distance from the loop antenna assembly.

Abstract: An antenna includes a dielectric substrate, a radiator disposed on one surface of the dielectric substrate, a feeding conductive pattern having one end connected with the radiator and the other end connected with an external feed line, a first slot disposed in the feeding conductive pattern, a ground plane disposed on the other surface of the dielectric substrate, and a second slot disposed on the ground plane.

Abstract: An object of the invention is to stabilize the convergence operation at the automatic impedance matching time and ensure the reception quality in the convergence process in a fading environment in a radio communication apparatus which performs automatic impedance matching between an antenna and a Radio frequency section to decrease the impedance matching loss, for example, when the apparatus is brought close to a human body.

Abstract: A device for multiple band frequency communication may include a chassis, a transceiver for receiving and transmitting voice and data communications over any one of multiple frequency bands, an antenna assembly comprising a single radiator and an antenna matching unit, and an antenna connector provided on the chassis for mounting the antenna assembly to the device and connecting the antenna assembly to the transceiver via a transmission line, wherein the antenna matching unit is provided between the radiator and the antenna connector and comprises a reactive circuit to filter the communications and transform an impedance between the radiator and the antenna connector to match an impedance between the transceiver and the antenna connector for each of the multiple frequency bands. A method and system is disclosed for communicating voice and data communications over multiple frequency bands.

Abstract: A radio frequency IC device includes a radio frequency IC chip, a feeder circuit substrate, and a radiating plate. The feeder circuit substrate includes a feeder circuit that electrically connects to the radio IC chip and that includes a resonance circuit and/or a matching circuit including inductance elements. The feeder circuit substrate is bonded to the radiating plate, which radiates a transmission signal supplied from the feeder circuit and supplies a received signal to the feeder circuit. The inductance elements are arranged in spiral patterns wound in opposite directions and couple to each other in opposite phases. The radio frequency IC device is able to obtain a radio frequency IC device that is not susceptible to being affected by a usage environment, minimizes variations in radiation characteristics, and can be used in a wide frequency band.

Abstract: A method for processing signals includes generating a frequency response adjusted signal of an antenna, and adjusting a gain of the antenna by varying a gain of a programmable amplifier that amplifies the frequency response adjusted signal. The generating of the frequency response adjusted signal may take place prior to the gain adjusting. A frequency response of the antenna may be dynamically adjusted during the generating. A programmable filter used for the generating may be autonomously adjusted. The gain of the antenna may be dynamically adjusted. The gain of the programmable amplifier may be autonomously varied. The programmable filter and the programmable amplifier may be adjusted sequentially.

Abstract: A wireless IC device has a resonant frequency that is hardly altered or affected by external influences and reliably communicates with a reader/writer. The wireless IC device includes a wireless IC chip arranged to process a radio signal, a feeder circuit board coupled to the wireless IC chip and including a feeder circuit, and a radiation electrode arranged at least one principal surface of the feeder circuit board. The feeder circuit board includes a magnetic material and has the feeder circuit disposed therein. The radiation electrode is disposed on at least one principal surface of the feeder circuit board so as to be electromagnetically coupled to the feeder circuit and includes at least two open ends. The wireless IC chip is coupled to the radiation electrode through the feeder circuit and communicates with a reader/writer using HF band frequency.

Abstract: An impedance control apparatus and method for portable mobile communication terminal is disclosed capable of accurately adjusting impedances relative to environment when the portable mobile communication terminal is being used, wherein an impedance of a first variable impedance matching part is varied to receive a reception impedance correction signal transmitted by a base station and to detect a reception strength, an impedance of the first variable impedance matching part is set by a impedance value of the largest reception strength out of the reception strengths, the portable mobile communication terminal varies the impedance of a second variable impedance matching part to transmit a transmission impedance correction signal to a base station and to allow the base station to detect the reception strength, and the impedance setting of the second variable impedance matching part is performed using the reception strength detected by the base station.

Abstract: Architectures and implementations of a transceiver system for wireless communications are presented, the system including one or more antennas supporting a single frequency band or multiple frequency bands, a transmit circuit, a receive circuit, and an isolation circuit that is coupled to the one or more antennas and the transmit and receive circuits and provides adequate isolation between the transmit circuit and the receive circuit.

Abstract: An antenna isolation circuit, meter reading device, and method of manufacturing an antenna isolation circuit are disclosed herein. A multilayer planar structure antenna isolation circuit uses distributed elements to provide high voltage isolation and RF coupling functions. The distributed elements may be implemented, for example, as multilayer distributed capacitors. In other embodiments, the distributed elements may be implemented as a distributed transformer.

Abstract: An antenna assembly for a wireless communications device has an antenna, a filter circuit, and a connector constructed to engage a wireless communications device. A filter circuit includes a band-pass filter and a first notch filter disposed in serial electrical communication with the band-pass filter, the band-pass filter operable to permit the passage of oscillatory electrical signals in a first frequency range, the first notch filter operable to impede the passage of oscillatory electrical signals in a second frequency range, the second frequency range residing within the first frequency range.

Abstract: Accuracy of derivation of local corrections to GPS signals for use for aircraft landing guidance is subject to effects of reflected multipath signals. Antennas with a near-spherical antenna pattern of right-hand circular polarization, except within a downward cone, provide suppression of reflected multipath GPS signals incident from all azimuth angles and all relevant elevation angles. For such an antenna a cylindrical top assembly may include spaced conductive disks with intermediate exciter members excited at increments of 90 degree phase and surrounded by a dielectric ring. A cylindrical base assembly may include signal absorbent top and side wall portions and a bottom conductive disk and may alternatively include a signal absorbent inner wall portion.

Abstract: A programmable antenna interface for coupling an antenna to a transceiver having a receiver section and a transmitter section, includes a transformer that is adjustable in accordance with a control signal. A transmit/receive module couples the transformer to the receiver section in a receive mode and to the transmitter section in a transmit mode. The control signal controls the transformer to a first impedance in the transmit mode and controls the transformer to a second impedance in the receive mode.

Abstract: The present invention is related to a coupled-fed multi-band loop antenna. The antenna comprises a dielectric substrate, a ground plane located on the dielectric substrate and has a grounding point, a radiating portion which comprise a supporter, a coupling trip and a loop strip, and a matching circuit. The coupling strip and loop strip are both located on the supporter, with the coupling strip surrounded by the loop strip. The length of loop strip is about 0.25 wavelength of the antenna's first resonant mode. The loop strip has a first end paralleling with the coupling loop, a second end and a shorting point near the second end and electrically connected to the grounding point on the ground plane. The matching circuit is on the dielectric substrate. One terminal of the matching circuit is connected to the coupling strip, and the other is connected to a signal source.

Abstract: A semiconductor package includes an insulating substrate configured to be provided for mounting a semiconductor chip which processes a signal with a frequency in a radio frequency band. The insulating substrate includes a first external connecting electrode, a second external connecting electrode, and a partial antenna wiring. The first external connecting electrode and the second external connecting electrode are connected with the partial antenna wiring. Each of the first external connecting electrode and the second external connecting electrode is an electrode to be connected with an external antenna pattern.

Abstract: An antenna device is arranged to transmit or receive a radio frequency communication signal to or from an external device such as a reader/writer, and is arranged such that an antenna resonance circuit including an antenna coil and a capacitor is connected to an additional resonance circuit including an inductor and a capacitor. A radio frequency IC device preferably includes the antenna device and a radio frequency IC. The antenna device is constructed such that a change in characteristics thereof caused by a change in the distance between a radio frequency IC device and a reader/writer is minimized, and the radio frequency IC device performs communication with high reliability.

Abstract: An antenna assembly having a radiating element and a circuit board is provided. The radiating element is coupled to the circuit board by a conductive extension and hook portion where the hook portion extends into and possibly through a bore on the circuit board.

Abstract: An object of the present invention is to prevent electrical characteristics of circuit elements from being adversely affected by copper diffusion in a semiconductor device having an integrated circuit and an antenna formed over the same substrate, which uses copper plating for the antenna. Another object is to prevent a defect of a semiconductor device due to poor connection between an antenna and an integrated circuit in a semiconductor device having the integrated circuit and the antenna formed over the same substrate. In a semiconductor device having an integrated circuit 100 and an antenna 101 formed over one substrate 102, when a copper plating layer 108 is used for a conductor of the antenna 101, it is possible to prevent copper diffusion to circuit elements and decrease an adverse effect on electrical characteristics of circuit elements due to the copper diffusion because a base layer 107 of the antenna 101 uses a nitride film of a predetermined metal.

Abstract: Electronic devices are provided that contain wireless communications circuitry. The wireless communications circuitry may include radio-frequency transceiver circuitry and antenna structures. A parallel-fed loop antenna may be formed from portions of an electronic device bezel and a ground plane. The antenna may operate in multiple communications bands. An impedance matching circuit for the antenna may be formed from a parallel-connected inductive element and a series-connected capacitive element. The bezel may surround a peripheral portion of a display that is mounted to the front of an electronic device. The bezel may contain a gap. Antenna feed terminals for the antenna may be located on opposing sides of the gap. The inductive element may bridge the gap and the antenna feed terminals. The capacitive element may be connected in series between one of the antenna feed terminals and a conductor in a transmission line located between the transceiver circuitry and the antenna.

Abstract: An integrated circuit (IC) includes a wireless power receive circuit, a wireless communication module, and a circuit module. The wireless power receive circuit generates a supply voltage from a wireless power electromagnetic signal. The wireless communication module converts inter-chip outbound data into an inter-chip outbound wireless signal; transmits the inter-chip outbound wireless signal to another IC; receives an inter-chip inbound wireless signal from the other IC; and converts the inter-chip inbound wireless signal into inter-chip inbound data. The circuit module is powered by the supply voltage and is operable to generate the inter-chip outbound data; and process the inter-chip inbound data.

Abstract: The present invention provides a chassis for a radio frequency communication device. The chassis includes an electrically conductive chassis portion having a length and a width, where the electrically conductive chassis portion has a line of symmetry substantially centered widthwise and running along the length of the electrically conductive chassis portion. The chassis further includes an electrically conductive bridge, which has a first end coupled to the electrically conductive chassis portion for enabling a current to pass therebetween. The chassis still further includes a path conductor having a first end and a second end, and a length therebetween. The first end of the path conductor is coupled to the electrically conductive chassis portion at an asymmetrical location relative to the line of symmetry.

Abstract: The present disclosure relates to an RFID tag, more particularly to, a UHF band RFID tag antenna using a double-open ends coupler; wherein the structure thereof is using a half wavelength dipole antenna with a double-open ends coupler mutually coupled to each other, and the RFID chip is disposed upon the coupler, and the coupler is designed to be double-open ends structure so as to, rather than prior arts, enhance the radiation without compromising the impedance match between the antenna and the chip.

Abstract: A semiconductor chip integrating a transceiver, an antenna, and a receiver is provided. The transceiver is formed on a front side of a semiconductor substrate. At least one through substrate via provides electrical connection between the transceiver and the backside of the semiconductor substrate. The antenna, which is connected to the transceiver, is formed in a dielectric layer on the front side. The reflector plate is connected to the through substrate via, and is formed on the backside. The separation between the reflector plate and the antenna is about the quarter wavelength of millimeter waves, which enhances radiation efficiency of the antenna. An array of through substrate trenches may be formed and filled with a dielectric material to reduce the effective dielectric constant of the material between the antenna and the reflector plate, thereby reducing the wavelength of the millimeter wave and enhance the radiation efficiency.

Abstract: A system for providing an adaptive antenna system in a mobile communications device is disclosed. An array of antenna elements is provided. A sensing component is disposed along a surface of the mobile communications device, proximal to the array of antenna elements. A processor component is communicatively coupled to the sensing component. An implementation element is communicatively coupled to the processor component, and to the array of antenna elements. The sensor component generates data characterizing the proximity of a foreign object to the array of antenna elements; which the processing component uses to determine a configuration for the array of antenna elements. The implementation element modifies the array of antenna elements, responsive to the configuration determined by the processor component.

Abstract: An antenna system adapted for a communication device has a common antenna with a predetermined length, an AM matching circuit matching with the common antenna and an FM matching circuit matching with the common antenna. A switch alternatively electrically connects the common antenna to the AM matching circuit and the FM matching circuit for achieving the AM function and FM function.

Abstract: A radio frequency (RF) transceiver includes a baseband processing module, a configurable receiver section, a configurable transmitter section and a configurable antenna assembly. The baseband processing module converts outbound data into an outbound symbol stream, converts an inbound symbol stream into inbound data and generates a transmit adjust signal and a receive adjust signal. The receiver section converts an inbound RF signal into the inbound symbol stream. The transmitter section converts the outbound symbol stream into an outbound RF signal. The antenna assembly receives the inbound RF signal via a first antenna structure and transmits the outbound RF signal via a second antenna structure. The first antenna structure and/or the configurable receiver section adjusts phase and/or amplitude of the inbound RF signal in accordance with the receive adjust signal.

Abstract: Certain aspects of a method and system for simultaneous FM transmission and FM reception using a shared antenna and a direct digital frequency synthesizer (DDFS) may be disclosed. In a FM transceiver that receives FM signals at a frequency f1 and transmits FM signals at a frequency f2, aspects of the method may include generating via a DDFS, a signal corresponding to a difference between f1 and f2 to enable simultaneous transmission and reception of FM signals via shared antenna.

Abstract: An antenna device including a substrate, a ground layer, a first feeding element, a second feeding element, a first control circuit and a second control circuit is provided. The substrate has a top surface and a lower surface. The ground layer disposed on the lower surface includes a first, a second and a third ground portions. The third ground portion is separated from the first and the second ground portions by a first and a second slots, respectively. The first and the second feeding elements include a first and a second conductive feeding lines, respectively. The first and the second conductive feeding lines cross over the first and the second slots and are electrically connected to the first and the second ground portions, respectively. The radiation pattern of the antenna device is variable by selectively operating the first, the second, the third and the fourth control circuits.

Abstract: An antenna array according to one embodiment of the invention comprises a plurality of steering elements. Each steering element includes two radiating elements overlaid so as to have a common phase center and radiating electric fields orthogonal to each other. Each steering element also includes two phase altering portions separately and electronically coupling the two radiating elements to selectively transmit signals corresponding to linear, elliptical and circular polarization patterns.

Abstract: An antenna feeding network, including at least one antenna feeding line, each antenna feeding line comprising a coaxial line having a central inner conductor and a surrounding outer conductor. The outer conductor (4) is made of an elongated tubular compartment (5) having an elongated opening (6) along one side of the compartment (5), and that the inner conductor (3) is suspended within the tubular compartment (5) by means of dielectric support means (7).

Abstract: A dielectrically loaded multifilar helical antenna having an operating frequency in excess of 200 MHz has an electrically insulative core with a relative dielectric constant greater than 5 occupying the major part of the interior volume defined by a three dimensional antenna element structure having, in one embodiment, eight coextensive helical tracks and, in another embodiment, six such tracks. The antennas are backfire or endfire antennas, all helical elements being phased so as to contribute to a circular polarization resonance at the operating frequency.

Abstract: Provided is a triplate line inter-layer connector having excellent loss suppression capability and allowing for inter-layer connection at any position, and a planar array antenna having uniform frequency characteristics in a beam direction. The triplate line inter-layer connector has an electrical connection structure between a first triplate line and a second triplate line. A first patch pattern is formed at a connection-side terminal end of a first feeder line. A first feed substrate has a first shield spacer disposed therebeneath, and a second shield spacer disposed just thereabove. Each of the first and second shield spacers has a hollow portion hollowed out to a size encompassing the first feeder line and the first patch pattern so as to define a corresponding one of first and second dielectrics in a respective one of the positions beneath and just above the first feed substrate.

Abstract: A method to design antennas with broadband characteristics. In an exemplary embodiment, a method comprises loading an antenna structure with multiple reactive loads. The multiple loads are synthesized by applying the theory of Characteristic Modes. Another exemplary embodiment includes an antenna adapted to have broadband characteristics. One example is a wire dipole antenna. In an exemplary embodiment, a loaded antenna may be adapted to resonate an arbitrary current over a wide frequency band. The loads may require non-Foster elements when realized. Exemplary embodiments may include the broadband characteristics of the both the input impedance at the terminal of the antenna as well as the radiation pattern.

Abstract: Disclosed is an internal antenna that provides impedance matching for multiple bands. The antenna includes an impedance matching part, which in turn includes a first conductive element electrically coupled to a feeding point and a second conductive element electrically coupled to a ground, and at least one radiator electrically coupled to the first conductive element, where the first conductive element and the second conductive element of the impedance matching part are separated by a particular distance to perform coupling matching and are electrically coupled at a pre-designated position. Certain aspects of the present invention can be utilized to provide wide band characteristics in designing for multi-band applications, even for high-frequency bands.

Abstract: A communication system includes the following elements: a transmitter including a transmission circuit unit configured to generate an RF signal for transmitting data and an electric-field-coupling antenna configured to transmit the RF signal as an electrostatic field; a receiver including an electric-field-coupling antenna and a reception circuit unit configured to receive and process the RF signal received by the electric-field-coupling antenna; and a surface-wave propagation medium configured to provide a surface-wave transmission line to transmit a surface wave emanating from the electric-field-coupling antenna of the transmitter with low propagation loss.

Abstract: A programmable antenna includes a fixed antenna element and a programmable antenna element that is tunable to one of a plurality of resonant frequencies in response to at least one antenna control signal. A programmable impedance matching network is tunable in response to at least one matching network control signal, to provide, for instance, a substantially constant load impedance. A control module generates the antenna control signals and the matching network control signals, in response to a frequency selection signal.

Abstract: A communication system includes a transmitter including a transmission circuit unit that generates an RF signal for transmitting data and an electric-field-coupling antenna that transmits the RF signal as an electrostatic field, a receiver including an electric-field-coupling antenna and a reception circuit unit that subjects an RF signal received by the electric-field-coupling antenna to reception processing, and a surface-wave propagating means for providing a surface wave transmission line made of a conductor that propagates a surface wave radiated from the electric-field-coupling antenna of the transmitter along a surface of the surface wave transmission line.

Abstract: There is described a duplexer comprising: a dielectric substrate having a circuit-receiving surface and an opposite surface; a ground structure deposited on the circuit-receiving surface or the opposite surface; a first filter connectable to a first terminal and having a first frequency bandpass; a second filter connectable to a second terminal and having a second frequency bandpass different from the first frequency bandpass, the first filter and the second filter each having at least one filter section deposited on the circuit-receiving surface; and an uncovered coupling circuit connectable to a third terminal and deposited on the circuit-receiving surface between the first filter and the second filter, the coupling circuit being spaced apart from the first and second filter by a coupling gap and configured for electromagnetically coupling the first filter and the second filter together.