Abstract: Antenna devices and techniques that provide specific control of the spatial distributions of DC and RF signals at various positions in a wireless apparatus are disclosed. The wireless apparatus includes various device components each having specifications for achieving desired operations in antenna devices.

Abstract: SAW element has a substrate; an IDT having a first comb-shaped electrode and a second comb-shaped electrode located on an upper surface of the substrate; and a capacitance element located on the upper surface of the substrate. The capacitance element has a first counter electrode connected to the first comb-shaped electrode and a second counter electrode connected to the second comb-shaped electrode and facing the first counter electrode across a third gaps. The direction from the first counter electrode through the third gaps toward the second counter electrode is a reverse direction from the direction from the first comb-shaped electrode through the gaps toward the second comb-shaped electrode.

Abstract: A broadcasting antenna for a vehicle and a shark fin antenna apparatus having the same are provided. The broadcasting antenna includes a main board on which a feeder circuit and a ground plane are formed, a helical radiation unit which includes a plurality of helical radiators that are electrically connected to the feeder circuit and the ground plane of the main board, that are formed in a first direction, and that are coupled apart from each other by a predetermined interval, and which has a coupling feed structure, and an extended radiation unit which includes a plurality of top loaders that are electrically connected to ends of the plurality of helical radiators, respectively, that are formed in a second direction, and that are coupled to each other.

Abstract: A broadband antenna with adjustable resonant frequency band includes a grounding element, first and second radiating conductors, and a variable capacitor. The first radiating conductor includes a feed-in portion and a radiating portion. The feed-in portion includes a feed-in end spaced apart from and adjacent to the grounding element. The second radiating conductor includes a coupling portion, and a short-circuit portion connected electrically between the coupling portion and the grounding element. The coupling portion is parallel to and couples with the radiating portion. The variable capacitor is connected electrically between the radiating portion and the coupling portion.

Abstract: An diplex filter for testing a base station is disclosed.

Abstract: An antenna with a combined bandpass/bandstop filter network is provided. The antenna includes: a first radiating arm connectable to an antenna feed, the first radiating arm configured to resonate at a first frequency; a second radiating arm, the second radiating arm and the first radiating arm, when electrically connected, configured to resonate at a second frequency lower than the first frequency; and, a filter network comprising a bandstop filter and a bandpass filter, the filter network filtering an electrical connection between the first radiating arm and the second radiating arm, the filter network configured to: electrically isolate the first radiating arm from the second radiating arm at the first frequency, and electrically connect the first radiating arm and the second radiating arm at the second frequency.

Abstract: A portable terminal has a keypad. The portable terminal includes the keypad including a plurality of key buttons in a predetermined pattern and forming an antenna pattern by using devices connected to both ends of predetermined key buttons among the plurality of key buttons, a Radio Frequency (RF) communicator connected to signal lines of the predetermined key buttons of the keypad, a digital circuit for recognizing a signal input to the keypad, and a controller for controlling the keypad to be selectively switched to one of the digital circuit and the RF communicator according to a signal generated in a resonance frequency region of a particular service band.

Abstract: Exemplary embodiments are related to multi-type antennas. A device may include an antenna and a ground plane. The device may further include a low-pass filter for coupling the antenna to the ground plane in a first mode of operation and isolating the antenna from the ground plane in a second, different mode of operation.

Abstract: The present disclosure provides a radiating element, such as a Balanced Antipodal Tapered Slot Antenna (BAVA) radiating element having embedded circuitry which includes an integrated filter and functions as a port mismatch circuit for protecting a communication system implementing the radiating element from jammers. The embedded circuitry may provide a dynamically adjustable filter and/or a port mismatch circuit at the radiating element level which allows for center frequency tuning, provides selectivity and/or acts as an adaptive first line of defense layer for protecting sensitive radio and digital signal processing (DSP) physical layers of the communication system.

Abstract: An antenna tuner provides a pass band with a transmission resonant frequency and a receive resonant frequency. In this manner, the pass band of the antenna tuner can simultaneously provide matching at both a transmission frequency and a receive frequency, when both transmission signals and receive signals are received on the same antenna. The antenna tuner includes a first capacitive element that is coupled to series resonate with the antenna and a low-pass pi network.

Abstract: An diplex filter for testing a base station is disclosed.

Abstract: A multimode antenna structure is provided for transmitting and receiving electromagnetic signals in a communication device. The communication device includes circuitry for processing signals communicated to and from the antenna structure. The antenna structure includes a plurality of antenna ports for coupling to the circuitry; a plurality of antenna elements, each operatively coupled to a different one of the antenna ports; and a plurality of connecting elements. The connecting elements each electrically connect neighboring antenna elements such that the antenna elements and the connecting elements are arranged about the periphery of the antenna structure and form a single radiating structure.

Abstract: A Vivaldi-Monopole antenna is a small form ultra-wideband antenna configured for low frequency operation in modern wireless devices. The Vivaldi-Monopole antenna comprises a tapered-slot element and a monopole element, wherein current modes of each element are combined to yield a functional and small form ultra-wideband antenna configured for low frequency resonances.

Abstract: An antenna structure includes a circuit board and an antenna formed on the circuit board. The antenna includes a ground portion and a feed portion extended from the ground portion and defining a cut with the ground portion, a connecting portion, a first resonation portion, and a second resonation portion. The first resonation portion defines a first gap with the connecting portion and the feed portion and obtains a first working frequency band by adjusting dimensions of the first resonation gap and the cut. The second resonation portion defines a second gap with the connecting portion and the ground portion, and obtains a second working frequency band by adjusting dimensions of the second resonation gap.

Abstract: The present invention is an integrated antenna assembly which allows for integration of a first radio system and a second radio system with the integrated antenna assembly. The integrated antenna assembly may include a coupler for providing sufficient isolation between the first radio system (ex.—a vertical polarization system) and the second radio system (ex.—a horizontal polarization system). The integrated antenna assembly may further include a common mode choke connected between a first antenna element and a second antenna element of the integrated antenna assembly. The coupler may produce a common mode based on signals received from the vertical polarization system and may also produce a differential mode based on signals received from the horizontal polarization system. The common mode choke may be configured for: preventing transmission of common mode currents from the first antenna element to the second antenna element; and being transparent to differential mode current flow.

Abstract: The present invention relates to an infinite wavelength antenna device, which includes: a board body made of a dielectric and having a slab structure; a feed part arranged on one surface of the board body, and generating a magnetic field when power is applied; and an MNG resonance part arranged on the board body so that a preset distance is maintained from the feed part and at least a portion thereof is placed within the magnetic field, grounded through both ends thereof, resonating at a specific frequency band when the magnetic field is generated, and having a negative permeability. In the present invention, as the infinite wavelength antenna device operates according to the infinite wavelength property, the resonant frequency band may be determined independently of the size of the antenna device. Hence, miniaturization of the infinite wavelength antenna device can be realized.

Abstract: A magnetic antenna includes a plurality of magnetic layers, coil conductor patterns wound around the magnetic layers about a winding axis in a direction perpendicular or substantially perpendicular to a stacking direction of the magnetic layers, a dielectric layer stacked on an outer layer of the magnetic layers, and a conducting pattern provided with the dielectric layer and coupled with a ground. The conducting pattern and the coil conductor patterns disposed along the outer layer are arranged such that at least a portion of the coil conductor patterns faces the conducting pattern and defines a stray capacitor therewith.

Abstract: An antenna apparatus includes a slit provided on an antenna element between first and second feed ports; and a series resonant circuit provided at a location along the slit, with a distance from an opening of the slit. When the antenna apparatus operates at a first isolation frequency identical to a resonance frequency of the series resonant circuit, the series resonant circuit is short-circuited, and only a section of the slit from its opening to the series resonant circuit resonates, thus providing isolation between the feed ports at the first isolation frequency. When the antenna apparatus operates at a second isolation frequency lower than the first isolation frequency, the series resonant circuit is open, and the entire slit resonates, thus providing isolation between the feed ports at the second isolation frequency.

Abstract: The present invention relates to a planar composite right/left handed (CRLH) antenna, comprising: a substrate body which is made of dielectric materials, and which has a planer structure; a radiation line which is disposed on one side of the substrate body, and which is bent to form a slot for exposing a predetermined width of the substrate body through both ends thereof, and which resonates at a predetermined frequency band when fed; and a feeder line which is disposed on the outer side of the substrate body, which extends across the slot, and which feeds electric power to the radiation line. The planar CRLH antenna of the present invention is small in size, and expands a radiation area, thereby expanding an available frequency band, or using a dual frequency band.

Abstract: The invention as disclosed is a buoyant cable antenna configured for both VLF/LF and HF signals. A 100 foot antenna element has a low-pass filter assembly positioned at the midpoint of the antenna element to block HF signals. The outboard tip of the antenna element is shorted. In this way, the antenna element appears as a 50 foot open circuit antenna element to HF signals and as a 100 foot shorted antenna element to VLF/LF signals.

Abstract: A multiple input multiple output (MIMO) antenna module, comprising a first signal feed port coupled to a first antenna element disposed along a first edge of an antenna array board, a second signal feed port coupled to a second antenna element disposed on the antenna array board and a transceiver operable to be selectively coupled to either or both of the first and second signal feed ports.

Abstract: A method for manufacturing an antenna device is provided. The manufacturing method includes forming an antenna circuit so that the resonance frequency of the antenna circuit will be lower than an oscillation frequency of the reader/ writer and affixing a magnetic sheet to an antenna coil via an adhesive. The antenna circuit includes the antenna coil that receives the magnetic field transmitted from the reader/ writer and a capacitor electrically connected to the antenna coil. The magnetic sheet is at a face-to-face position with respect to the antenna coil and is configured to change the inductance of the antenna coil. The adhesive is of a film thickness to change the inductance so that the resonance frequency of the resonance circuit will be coincident with the oscillation frequency depending on the spacing between the antenna coil and the magnetic sheet.

Abstract: An antenna element has a slit including a first portion and a second portion, the first portion extending in a first direction so as to separate first and second feed points from each other, and the second portion extending in a second direction different from the first direction. The slit is configured to resonate at an isolation frequency to produce isolation between the first and second feed points, and configured to form a current path around the slit. A current distribution along the current path generated by exciting through the first feed point is different from a current distribution along the current path generated by exciting through the second feed point, thus providing different radiation characteristics by the different current distributions.

Abstract: A multifunction antenna is described in which the multifunction antenna is divided into a first segment and a second segment by an impedance circuit that produces low impedance at a low frequency and high impedance at a high frequency. A high frequency radio frequency (HF-RF) signal may be transmitted or received using only the first segment of the multifunction antenna from a HF-RF transceiver by blocking the HF-RF signal from the second segment by the impedance circuit. A low frequency radio frequency (LF-RF) signal may be received using both the first segment and the second segment of the multifunction antenna by passing the LF-RF signal through the impedance circuit.

Abstract: The present invention provides a capacitive grounded RF coaxial cable to airstrip transition which comprises a conductive ground plane, an insulating gasket, a reflector plate and an insulating fixing component. The conductive ground plane, the insulating gasket and the reflector plate are attached uniformly and tightly in sequence and fixed together by the insulating fixing component. The outer surface of the conductive ground plane is connected conductively with the outer conductor of the RF coaxial cable. Preferably, the conductive ground plane is a metal plate and the insulating gasket is a plastic gasket. The capacitive grounded RF coaxial cable to airstrip transition further comprises at least one perforation penetrating the conductive ground plane, the insulating gasket and the reflector plate in sequence. The insulating fixing component includes at least one insulating rivet and at least one conductive supporting piece is arranged on the outer surface of the conductive ground plane.

Abstract: An integrated circuit includes a plurality of circuits including a plurality of millimeter wave interfaces for communicating data between the plurality of circuits via millimeter wave RF signaling. A power supply line supplies at least one power supply signal to the plurality of circuits. The power supply line includes a plurality of antenna elements to facilitate the communicating of first data between the plurality of circuits via the millimeter wave RF signaling.

Abstract: A printed filtering antenna is provided. This filtering antenna comprises an antenna part and a coupled line resonator. The antenna part is directly connected to a coupled line resonator and occupies an antenna area. The coupled line resonator provides a filtering mechanism together with the antenna part. The coupled line resonator comprises a short-circuited stub and an open-circuited stub. The short-circuited stub comprises an open-circuited end and a short-circuited end connected to ground. The open-circuited stub is parallel to the short-circuited stub. The open-circuited stub comprises a first end and a second end. The first end is connected to the feed point and is corresponding to the open-circuited end of the short-circuited stub such that the open-circuited stub is coupled to the short-circuited stub.

Abstract: There is provided an antenna implementing a first 0-th order resonant frequency using a first radiator to which power is fed through parallel inductors of helical structures, and implementing a second 0-th order resonant frequency using a second radiator to which power is couple-fed through radiation elements put into the helical structures.

Abstract: An antenna (2-20) for use in a mobile device (1-1) includes elements for receiving (2-5, 3-1, 4-1, 5-1, 6-5) a signal from a satellite positioning system; a first layer of dielectric material (2-4a, 2-4b, 3-2, 3-3, 5-2, 4-3, 5-2, 5-3, 6-4, 6-15) and a second layer of dielectric material (2-4a, 2-4b, 3-2, 3-3, 5-2, 4-3, 5-2, 5-3, 6-4, 6-15), wherein the elements for receiving (2-5, 3-1, 4-1, 5-1, 6-5, 7-6) the signal is at least partly between the first dielectric layer (2-4a, 2-4b, 3-2, 3-3, 5-2, 4-3, 5-2, 5-3, 6-4, 6-15) and the second dielectric layer (2-4a, 2-4b, 3-2, 3-3, 5-2, 4-3, 5-2, 5-3, 6-4, 6-15).

Abstract: An antenna with a built-in filter for use in an electronic device includes: an antenna element; and a circuit board unit connected to the antenna element, wherein the circuit board unit includes: a filter circuit that filters input and output signals of the antenna element; and a matching circuit that performs impedance matching of the antenna element.

Abstract: A near field magnetic coupling antenna may include a plurality of annularly arranged radiators and an annular conductive portion. The annular conductive portion may include a plurality of conductive segments. A first gap may be formed between any two adjacent radiators. Each conductive segment may partially overlap two adjacent radiators and any two adjacent conductive segments may be separated by a second gap. Two adjacent radiators may be associated with a feed point and a ground point, respectively, and the feed point and the ground point may be disposed in the proximity of the first gap.

Abstract: A wideband antenna for use portable radio devices, and methods for operating the same. In one embodiment, a monopole antenna is used within a laptop computing device. The antenna comprises a monopole radiator coupled to an auxiliary ground plane element, and is placed substantially outside of the footprint of the computer display ground plane. In one implementation, the auxiliary ground element is configured not to have electrical connections to the ground plane of the laptop. In another implementation, a solid state switch selectively connects an antenna parasitic element to the main ground thus enabling selective control of the antenna lower frequency operating band.

Abstract: An antenna duplexer includes a transmission filter and a reception filter both coupled with an antenna terminal. The transmission filter has a lower pass band than the reception filter. The transmission filter includes a first series resonator coupled with a first terminal, a second series resonator connected to the first series resonator at a first node, a first parallel resonator connected to a first port of the first series resonator, a second parallel resonator connected to a first node and the first parallel resonator at a second node, a third parallel resonator connected to the first node, a fourth parallel resonator connected to the third parallel resonator at a third node, a first inductance element coupled with the second node and a ground, and a second inductance element coupled with the third node and the ground. The second inductance element has a lower inductance than the first inductance element.

Abstract: Techniques for adjusting one or more antenna parameters to optimize the performance of a wireless device are disclosed. In an embodiment, a variable antenna match is provided with a control signal for selecting a preferred antenna match setting. The preferred antenna match setting may correspond to the setting having a best signal quality metric. In a further embodiment, a variable antenna electrical length module is provided with a control signal for selecting a preferred antenna electrical length. Further techniques for accommodating multiple antennas are disclosed.

Abstract: According to one embodiment, an antenna device includes a first element, a stub, and an open end element. The first element has a folded monopole structure in which a conductor is folded at a folding portion to form a forward portion and a backward portion. A base end of the forward portion is connected to a feeding point, and a distal end of the backward portion is connected to a ground via a first lumped parameter. The stub is provided between the forward portion and the backward portion of the first element so as to shunt the forward portion and the backward portion. The open end element includes a conductor placed in parallel to the first lumped parameter. A base end of the conductor is connected between the stub of the backward portion of the first element and the ground, and the distal end of the conductor is open.

Abstract: Provided is a portable wireless device having a plurality of antennas of different frequency bands. By positively using one antenna for improving gains of other antennas, the one antenna can be effectively used and the gains of other antennas can be improved. Patterns (A1, A2, A3, B1, B2 B3) for adding a band disturbing element (80) (high frequency blocking means), which is composed of beads and a parallel resonance circuit, are arranged at a prescribed position of a magnetic field antenna (50). The band disturbing element (80) may be composed of ferrite core or the like.

Abstract: Techniques for adjusting one or more antenna parameters to optimize the performance of a wireless device are disclosed. In an embodiment, a variable antenna electrical length module is provided with a control signal for selecting a preferred antenna electrical length. Further techniques for accommodating multiple antennas are disclosed.

Abstract: An electric apparatus that includes a component having a conductive layer in a fixed range in the depth direction, the conductive layer including a particular region that is electromagnetically isolated from other regions. The electric apparatus further includes a metamaterial which exhibits a dielectric constant having an absolute value less than 1 and a magnetic permeability having an absolute value more than 1 with respect to a predetermined resonant wavelength in an electromagnetic field. The metamaterial is arranged so as to cut off the near resonant wavelength component of an electric current flowing through the conductive layer in the particular region, and at least part of the particular region is configured to radiate an electromagnetic wave.

Abstract: A long-wave or medium-wave receiver receives a first signal from a first terminal of a loopstick antenna on a positive antenna input terminal of the receiver and receives a second signal from a second terminal of the loopstick antenna on a negative antenna input terminal of the receiver. The first and second signals are processed differentially in the receiver. The receiver may optionally be configured to operate in either a differential mode or a single-ended mode by setting switches to selectively connect one of the antenna input terminals to ground in single-ended mode.

Abstract: Reconfigurable multi-band filter techniques are described. In one or more implementations a device includes a radiating structure and a filter connected to the radiating structure configured to filter wireless signals received by the radiating structure. The filter includes switchable resonators configured to tune to different frequency bands and tunable capacitors configured to tune to different frequencies within the different frequency bands.

Abstract: A transmit antenna system includes active transmit electronics. A transistor has its gate coupled to a pulse generator for receiving the voltage pulses produced thereby. A coupled inductor is coupled to the transistor's drain. A tuning capacitor is coupled to the coupled inductor. An antenna is coupled to the coupled inductor and tuning capacitor. A choke inductor is coupled to the coupled inductor and a direct current voltage source. During each of the voltage pulses of the pulse generator, a resonant circuit is defined where parameters of the resonant circuit include resistance and capacitance of the antenna, capacitance of the tuning capacitor, inductance of the coupled inductor, and capacitance of the transistor. The resonant circuit is configured such that a resonant frequency thereof is equal to the pulse frequency of the pulse generator.

Abstract: Apparatus, methods, computer software and computer program products are provided for tuning a user equipment antenna to simultaneously operate at more than one resonant frequency by combining a first electrical load and a first frequency selective component to tune the antenna to a first resonant frequency with respect to signals in a first frequency range, and combining a second electrical load and a second frequency selective component to tune the antenna to a second resonant frequency with respect to signals in a second frequency range. The first electrical load, the second electrical load, the first frequency selective component and the second frequency selective component act to tune the antenna to operate simultaneously at the first resonant frequency and the second resonant frequency.

Abstract: It is an object of the present invention to provide a semiconductor device which can be surely supplied electric power by electromagnetic waves in different frequency bands without preventing reduction in size and weight of a semiconductor device. A semiconductor device capable of wireless communication is provided with a frequency determining circuit which detects the frequency of the electromagnetic waves received by the antenna and a circuit which automatically adjusts impedance in accordance with information from the frequency determining circuit, and the semiconductor device communicates and obtains electric power by one antenna. For adjustment of impedance, a circuit which can change the inductance or the capacitance, or an antenna which can change the length is used.

Abstract: An antenna module is provided. The antenna module includes a radiator, a feed pin, a ground element, a first parasitic arm, a second parasitic arm and an impedance matching unit. The radiator includes a first section and a second section, wherein an end of the first section is connected to the second section, and the first section is perpendicular to the second section. The feed pin is connected to another end of the first section. The first parasitic arm is parallel to the second section, wherein an end of first parasitic arm is connected to the ground element, and the first parasitic arm couples with the second section of the radiator. The impedance matching unit is connected to the second section and the ground element. The second parasitic arm is partially parallel to the first section, and the second parasitic arm couples with the first section of the radiator, and an end of the second parasitic arm is connected to the ground element.

Abstract: A filter circuit includes: a filter element having a first terminal connected to an antenna, a second terminal connected to a receiving circuit, and a third terminal connected to a transmission circuit; a first inductor, a second inductor, and a third inductor connected in series between the first terminal and the third terminal of the filter element; a fourth inductor that has one end connected to a connecting node connecting the first inductor and the second inductor and that has the other end grounded; and a fifth inductor that has one end connected to a connecting node connecting the second inductor and the third inductor and that has the other end grounded.

Abstract: A band-notched ultra-wideband antenna comprises a top layer non-uniform short-circuit metal patch, a middle layer metal radiation patch, and a bottom layer metal patch. The bottom layer metal patch includes a coupled open/short circuit stub which is set close to the middle layer metal radiation patch. The equivalent circuit of the top layer non-uniform short-circuit metal patch is a parallel LC resonator, and the equivalent circuit of the coupled open/short circuit stub is a series LC resonator. The resonant frequency of the top layer non-uniform short-circuit metal patch is equivalent to the resonant frequency of the coupled open/short circuit stub, so as to function as a second-order bandstop filter to yield high notch-band-edge selectivity without increasing total circuit area of the band-notched ultra-wideband antenna.

Abstract: An antenna includes a dipole radiator region forming a series resonant tank having a first quality factor value Q1, and a loop compensator/radiator region integral with the dipole region and forming a parallel resonant tank having a second quality factor value Q2 that is substantially equal to Q2. The antenna may be a conductive sheet antenna (e.g., comprising copper tape) having a generally “A” shaped structure with a discontinuity in a middle segment.

Abstract: Electronic devices may be provided that contain wireless communications circuitry. The wireless communications circuitry may include radio-frequency transceiver circuitry and antennas. An antenna may be formed from an antenna resonating element arm and an antenna ground. The antenna resonating element arm may have a shorter portion that resonates at higher communications band frequencies and a longer portion that resonates at lower communications band frequencies. A short circuit branch may be coupled between the shorter portion of the antenna resonating element arm and the antenna ground. A series-connected inductor and switch may be coupled between the longer portion of the antenna resonating element arm and the antenna ground. An antenna feed branch may be coupled between the antenna resonating element arm and the antenna ground at a location that is between the short circuit branch and the series-connected inductor and switch.

Abstract: An adjustable monopole antenna especially intended for the mobile terminals. The adjusting circuit (930) of the antenna is located between the radiator (920) and the antenna port of a radio device and forms, together with the antenna feed conductor (901), a feed circuit. This circuit comprises an adjustable reactance between the feed conductor and the ground in series with the feed conductor or in both of those places. For example, the feed conductor can be connected by a multi-way switch to one of alternative transmission lines, which are typically short-circuited or open at their tail end and shorter than the quarter wave, each line acting for a certain reactance. The antenna operating band covers at a time only a part of the frequency range used by one or two radio systems, in which case the antenna matching is easier to arrange than of a real broadband antenna. The space required for both the radiator and the adjusting circuit is relatively small.

Abstract: The present invention discloses an RF device for a wireless communication device, including a grounding element, an antenna, including a radiating element, a feed-in element, a coupling element, a switch, coupled between the coupling element and the grounding element, for connecting or disconnecting the grounding element to the coupling element, such that the antenna respectively operates in a first frequency band and a second frequency band, and a grounding terminal, for coupling the grounding element, a capacitive sensing element, for sensing an environment capacitance within a specific range through the radiating element, at least one capacitor, for blocking a DC route from the grounding terminal to the grounding element.