Abstract: A low band dipole and a multi-band multi-port antenna arrangement are disclosed. The low band dipole has four dipole arms. The four dipole arms are horizontally and mutually perpendicularly placed in a “+” shape and adjacent two mutually perpendicular dipole arms are fed therebetween. The antenna arrangement includes a main reflector, at least one column of low band dipole array disposed on the main reflector, and at least one column of high band dipole array adjacent to the at least one column of the low band dipole array. At least one low band dipole in each column of the at least one column of low band dipole array satisfies the following condition: the low band dipole has four dipole arms, the four dipole arms are horizontally and mutually perpendicularly placed in a “+” shape, and adjacent two mutually perpendicular dipole arms are fed therebetween to form a +/?45 degree polarization.

Abstract: RFID tag RFIC modules are provided with each module including an RFIC, an antenna connection first electrode, an antenna connection second electrode, an RFIC connection first electrode, an RFIC connection second electrode, an impedance matching circuit that matches impedance between the RFIC and an antenna, and a rectangular substrate. A first coil and a second coil of the impedance matching circuit are juxtaposed in/on the substrate, and a straight line passing through center of gravity of the coil opening of the first coil and center of gravity of the coil opening of the second coil is inclined with respect to one side of the substrate, and directions of this inclination are different between the first RFIC module and the second RFIC module.

Abstract: An antenna element includes a substrate, a first vertically polarized dipole antenna, a second vertically polarized dipole antenna, a reflector and a first feeding structure. The substrate has a ground plate. The first vertically polarized dipole antenna includes a first antenna branch and a second antenna branch that are disposed in the substrate at an interval. The second vertically polarized dipole antenna includes a third antenna branch and a fourth antenna branch that are disposed in the substrate at an interval. The reflector includes several reflection pillars that are arranged in the substrate at intervals along a parabola. The first feeding structure electrically connects each of the first antenna branch, the second antenna branch, the third antenna branch, and the fourth antenna branch to the ground plate.

Abstract: An antenna element antenna element includes: a substrate, having a ground plate; a vertically polarized dipole antenna, including a first antenna branch and a second antenna branch, where the first antenna branch and the second antenna branch are disposed in the substrate at an interval; a reflector, including several reflection pillars, where the several reflection pillars are sequentially arranged in the substrate at intervals along a parabola; and a first feeding structure, where the first antenna branch and the second antenna branch are electrically connected to the ground plate via the first feeding structure.

Abstract: Radar loss caused by a windshield having laminated glass in a vehicle is suppressed with a simple configuration. An antenna's radiation section is disposed inside the windshield of a vehicle having a plurality of layers. The radiation section not only radiates radio waves but also receives reflected waves of the radio waves from a target. A distance measurement information generation section is connected to the radiation section. The distance measurement information generation section measures a distance to the target on the basis of the radiated radio waves and the reflected waves from the target and generates distance measurement information.

Abstract: This antenna device is provided with: a ground; strip lines that extend from positions facing each other with respect to the width direction of the ground; a plurality of slots which is provided to the ground and which intersects with straight lines along the strip lines; and branch lines which intersect with the slots that are positioned to face the branch lines in a back surface.

Abstract: Radar radiation redirecting tapes (1, 2) include a first plurality of individual radar-reflecting directional antennae (5, 11). Each directional antenna comprises at least three elongate, unevenly spaced antenna conductors (10, 20, 30), arranged with their long extensions parallel to each other in the plane of the tape, such that the directional antenna is operable to reflect incoming radar radiation predominantly in a direction (80) which is orthogonal to the long extension of the antenna conductors and parallel to the plane of the tape.

Abstract: The present invention relates to a mobile terminal comprising: a terminal body; a ground provided in the interior of the terminal body; a first conductive member distanced from the ground, electrically supplied from a first supply unit, and surrounding one side of the ground; a second conductive member disposed on one side of the first conductive member, electrically supplied from a second supply unit, and surrounding the other side of the ground; and a junction portion, disposed at one point on the first conductive member, for grounding same to the ground, wherein one end of the first conductive member is distanced from the ground to form a first open slot, one end of the second conductive member is distanced from one end of the first conductive member to form a second open slot, the other ends are connected to the ground, and the first and second conductive members are oriented so as to cross each other.

Abstract: A wireless communication device having a feeding circuit that includes an RFIC chip; and antenna elements connected to the feeding circuit. The feeding circuit FC further includes a first resonant loop including the RFIC chip and multiple inductance elements; and a second resonant loop including a capacitance element and multiple inductance elements. Moreover the inductance elements of each of the first and second resonant loops, the shared inductance elements are included. The second resonant loop includes an antenna port for connection to the antenna elements.

Abstract: A millimeter-wave antenna system includes: a ground plane; and a folded dipole radiator including: a plurality of feeds each extending away from the ground plane from a proximal feed end to a distal end; a plurality of radiating arms each coupled to and extending away from the distal feed end of a respective one of the plurality of feeds; and a plurality of folded conductors each coupled to a respective one of the plurality of radiating arms and each having a distal portion extending toward the ground plane to a distal conductor end; where each of the plurality of feeds and each of the plurality of radiating arms comprises an electrical conductor; and where the folded dipole radiator is discontinuous, without a conductive connection between the plurality of feeds via the plurality of radiating arms.

Abstract: Disclosed is a shaped horn in conjunction with a dielectric tube for enhanced aperture directivity that can achieve a near optimum efficiency. The shaped horn provides additional mode control to provide an improved off-axis cross-polarization response. The horn shape can be individually optimized for isolated horns or for horns in a feed array. The feed array environment can produce results that lead to a different optimized shape than the isolated horn. Lower off axis cross-polarization can result in improved efficiency and susceptibility to interference.

Abstract: An antenna structure includes a dielectric substrate, a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, a fifth radiation element, and a sixth radiation element. The dielectric substrate has an upper surface and a lower surface. The first radiation element, the second radiation element, the fourth radiation element, and the fifth radiation element are disposed on the upper surface of the dielectric substrate. The third radiation element and the sixth radiation element are disposed on the lower surface of the dielectric substrate. A positive feeding point is positioned at an end of the first radiation element. A negative feeding point is positioned at an end of the fourth radiation element. The third radiation element couples the first radiation element to the second radiation element. The sixth radiation element couples the fourth radiation element to the fifth radiation element.

Abstract: The present invention generally relates to an electromagnetic field vector sensing receive antenna array system for installation and deployment on a structure. A multipolarized array of collocated antenna elements is used to provide calibrated amplitude and phase radiation patterns with monopole, dipole, and loop modes generated from crossed loops connected to a be beamformer. The invention has applications for installation and deployment on a tower, balloon, or satellite for radio frequency sensing and location of low-frequency galactic emissions. The novel receive antenna array system comprises a multipolarized vector sensor antenna array. The disclosed direction-finding vector sensor can be installed and deployed on a structure and can detect and locate radio frequency emissions from galactic sources. The key system components of the receive antenna array system consist of deployable antennas, receivers, signal processing computer, and communications link.

Abstract: A wideband bow tie antenna includes a guiding unit, a radiating unit, and a reflecting unit. The radiating unit is configured between the guiding unit and the reflecting unit. The radiating unit includes a guiding substrate and a guiding patch configured on the guiding substrate. The radiating unit includes a radiating substrate and a first bow tie radiator which is configured on the radiating substrate and coupled with the guiding patch. The first bow tie radiator includes two single radiating portions which are symmetrically configured to each other. The reflecting unit includes a reflecting substrate and a loop reflecting patch which are configured on the reflecting substrate and coupled with the first bow tie radiator.

Abstract: An antenna including a high band generating assembly having a first end and a second end, the high band generating assembly including a feed point and a bifurcated conductive element coupled to the feed point and having an angularly bent tip, the feed point defining the first end of the high band generating assembly, the angularly bent tip defining the second end of the high band generating assembly, at least one low band generating assembly, the at least one low band generating assembly including the high band generating assembly and at least one pair of dipole arms extending from the bifurcated conductive element, and a balun portion coupled to the feed point.

Abstract: An antenna includes first and second radiation portions including one lead wire that is folded back into a loop shape to define a folded-back portion and that includes a first power feed portion at a first end and a second power feed portion at a second end. The lead wire portion extending toward the folded-back portion and the lead wire portion extending through the folded-back portion are close enough to each other near each of the first and second power feed portions in the first and second radiation portions, respectively, to be electromagnetically coupled to each other. The power feed portions of the antenna are coupled to a wireless IC chip. The power feed portions may be coupled to a feed circuit in a feed circuit board coupled to a wireless IC.

Abstract: Controllable directional antenna apparatus and method preferably includes structure and/or steps whereby a Yagi antenna array has a first driven element, a first reflector, and plurality of first directors disposed on a common substrate. The first reflector is bent such that (i) an unbent length thereof is longer than a length of the first driven element, but (ii) a bent length thereof is shorter than the length of the first driven element. A second driven element is also disposed on the common substrate but is angled with respect to the first driven element. A second reflector and a plurality of second directors are also disposed on the common substrate. The second reflector is bent like the first reflector, to reduce the footprint of the array on the substrate. Preferably, the Yagi antenna elements are printed on a printed circuit board.

Abstract: Antenna unit cells suitable for use in antenna arrays are disclosed, as are antenna arrays and mounting platform such as an aircraft comprising antenna unit cells. In one embodiment, an antenna unit cell comprises a signal feed line, a ground plane, a first antenna element comprising a first antenna arm coupled to the signal feed line and a second antenna arm coupled to the ground plane, and a first narrow-band conductor coupled to the first antenna arm and to the ground plane. Other embodiments may be described.

Abstract: The present invention consists of an antenna comprising at least two radiating structures, said radiating structures taking the form of two arms, said arms being made of or limited by a conductor, superconductor or semiconductor material, said two arms being coupled to each other through a region on first and second superconducting arms such that the combined structure of the coupled two-arms forms a small antenna with a broadband behavior, a multiband behavior or a combination of both effects. According to the present invention, the coupling between the two radiating arms is obtained by means of the shape and spatial arrangement of said two arms, in which at least one portion on each arm is placed in close proximity to each other (for instance, at a distance smaller than a tenth of the longest free-space operating wavelength) to allow electromagnetic fields in one arm being transferred to the other through said specific close proximity regions.

Abstract: A wireless IC device includes a wireless IC chip, a feeder circuit substrate which is coupled to the wireless IC chip and includes a feeder circuit including an inductance element, and a radiation plate. The inductance element includes a plurality of stacked layers having coil conductors electrically connected, and a coil conductor electrically connected in a middle portion of the inductance element is arranged at an end position in the coil axis direction and faces a coupling portion of the radiation plate.

Abstract: A dipole antenna provides electrical dipole conductors folded to form distributed inductive and/or capacitive reactive loads between selected portions of one or more coupled line segments of the individual dipole conductors or between one dipole conductor to another, wherein the electrical dipole conductors form a selective frequency filter. An antenna provides a substrate, electrical conductors formed on and/or in the substrate, and one or more ceramic dielectric elements having relative permittivity ?R?10 and/or relative permeability ?R?10 formed on and/or in the substrate between selected portions of the electrical conductors for determining a distributed reactance within the selected portions. A folded dipole antenna provides conducting dipole arms, a distributed network filter having distributed reactance within and between the conducting dipole arms, and a tunable reactance connected to an input of the distributed network filter for adjusting a resonant frequency of the antenna.

Abstract: An antenna and multi-antenna system are provided. Each antenna of the system is a mirror image and comprises first and second conductive elements each having a first end and a second end portion, the second end portions being capacitively coupled to each other. Each antenna can be operated as a lower-frequency folded dipole having a series capacitive gap which facilitates electrical lengthening of the antenna, or as a higher-frequency monopole antenna having a parasitic element which facilitates improved bandwidth. The antennas' feedpoints may be placed at opposite corners of a ground plane, and separated by a distance which is less than one quarter of an operating wavelength of the dipole but greater than one quarter of an operating wavelength of the monopole. Locating the feedpoints at the ground plane corners facilitates orthogonal polarization of the two antennas at least in dipole mode. The antennas thus provided exhibit good isolation.

Abstract: An antenna device, in which a dipole antenna (110), a first monopole antenna, and a second monopole antenna are disposed on an insulating board (140), wherein the dipole antenna (110) includes left and right elements connected to a power feeding section (150), and the left and right elements have: first portions extended from the power feeding section in a state of facing each other; and second portions extended from the first portions separately to left and right sides, and the first monopole antenna (120) connects to the power feeding section and extends toward the second portion of the left element in the dipole antenna (110), and the second monopole antenna (130) connects to the power feeding section (150) and extended toward the second portion of the right element of the dipole antenna (110).

Abstract: According to one embodiment, an antenna apparatus comprises an antenna element connected to a feeding point, a grounded first lumped constant element connected to the antenna element, and a grounded second and third lumped constant elements connected to the antenna element through a selector. The selector is configured to connect the grounded second lumped constant element to the antenna element in order to lower a resonant frequency of the antenna element, and to connect the grounded third lumped constant element to the antenna element in order to raise the resonant frequency of the antenna element.

Abstract: An R.F. energy collection circuit, provides a low-loss R.F. front end tuned to minimize lost power in R.F. bands commonly used for communications for passing substantially coherent R.F. signals received therefrom, a rectifier circuit coupled to receive coherent R.F. energy from the front end, and an energy storage circuit coupled to receive energy from the rectifier circuit.

Abstract: In a U-shaped deformed folded dipole antenna, a first parallel section having a feeding point includes first and second L-shape sections, and a second parallel section without a feeding point includes first and second opposing side portions and a connecting side portion coupling ends of the first and second opposing side portions. Portions of the first and second L-shape sections arranged in parallel with the first and second opposing side portions have a width W1. Portions of the first and second L-shape sections arranged in parallel with the connecting side portion have a width W2. The first and second opposing side portions have a width W3. The connecting side portion has a width W4. An impedance of the deformed folded dipole antenna is controlled by setting the width W2 to be larger than the widths W1, W3, and W4.

Abstract: A dual wideband dipole antenna used for wireless communication and receiving electromagnetic signals is revealed. The antenna mainly includes a dielectric substrate, two radiating metal portions and a feed line. Each radiating metal portion consists of a metal plate, an L-shaped metal piece and a rectangular metal sheet. An initial end of the metal plate has a feeding point. The metal plate has a regulatory segment and a projecting segment. The L-shaped metal piece is between a terminal end of the metal plate and the regulatory segment. The L-shaped metal piece has a turning portion. The rectangular metal sheet is between the terminal end of the metal plate and a rear end of the regulatory segment of the other metal plate. The feed line connects the feeding points. Thus the antenna is excited to produce resonance frequencies at 0.85, 1.13, 1.68, 1.93 and 2.29 GHz and cover GSM850/900/1800/1900 bands.

Abstract: A wireless receiver including a dipole antenna and a circuit board, wherein high directivity characteristics can be acquired for wireless signals is provided. The wireless receiver includes a balanced feed antenna and a circuit board arranged in parallel to the longitudinal direction of the aforementioned balanced feed antenna. A conductive pattern formed on the aforementioned circuit board is composed of two or more partial patterns arranged with a gap interposed therebetween. The gap is formed at a position in between both ends of the aforementioned balanced feed antenna.

Abstract: An radio frequency identification (“RFID”) system and RFID tag that include a substrate body having a surface where the substrate body defines a plane of the tag, an RFID integrated circuit disposed on the surface of the substrate body, and an antenna that has an antenna pattern, which is disposed on the substrate body and in electrical communication with the RFID integrated circuit, the antenna generating a radiation pattern with maximum gain along an axis that is substantially coplanar with the tag.

Abstract: An antenna and a communication device thereof are provided. The antenna includes at least one ground and at least one radiating portion. The ground is disposed on a dielectric substrate, and the radiating portion includes at least one signal source and at least one closed conductor loop. The closed conductor loop has a first coupling conductor portion and a second coupling conductor portion, and the closed conductor loop has a plurality of bending portions to form a three-dimensional structure, and a first coupling gap is formed between the first and the second coupling conductor portions. The closed conductor loop further has a feeding portion and a short-circuit portion to form a second coupling gap between them. The feeding portion is electrically connected or coupled to the at least one signal source, and the short-circuit portion is electrically connected or coupled to the ground.

Abstract: An antenna apparatus includes a dipole antenna, a first monopole antenna and a second monopole antenna, each formed in a form of a conductor pattern on an insulating substrate. A fifth portion of the first monopole antenna and a seventh portion of the second monopole antenna are formed to be adjacent to and to be substantially parallel to a grounding conductor provided outside the antenna apparatus. The fifth portion includes a loop portion, and the seventh portion includes a loop portion.

Abstract: Antennas for transmitting and receiving circularly polarized UHF SATCOM radio signals include a mast which has four circumferentially spaced apart element mounts that protrude radially from the mast, each having a mechanical coupling mechanism holding an electrically conductive tubular antenna element disposed radially from the mast for use and parallel to the mast to minimize the envelope size of the antenna when not in use. Replaceable elements in one version of the antenna have a threaded stud threadably receivable in a threaded socket on the element mount. Each element of a foldable version of the antenna has a tapered support peg which is insertably receivable in a tapered socket in a boss on the element mount and releasably held therewithin by a tensioning spring within the element. Optionally, a fifth conductive element is disposed longitudinally within the mast to transmit and receive linearly polarized radio signals.

Abstract: An apparatus including a first port configured to couple to a first location on an antenna; a second port configured to couple to a second location on the antenna; a switch configured to switch between a first electrical configuration in which the first port is coupled to radio circuitry, and a second electrical configuration in which the second port is coupled to the radio circuitry; first reactive circuitry configured to impedance match the antenna with the radio circuitry at a first operational resonant frequency band; and second reactive circuitry, different to the first reactive circuitry, and configured to impedance match the antenna with the radio circuitry at a second operational resonant frequency band, different to the first operational resonant frequency band.

Abstract: In accordance with a preferred embodiment of the invention, reader antennas are provided within storage fixtures or supporting fixtures for transporting RF signals between, for example, an RFID reader and an RFID tag. In a preferred embodiment, the RFID-enabled fixtures are implemented using an intelligent network, which may allow enhanced flexibility in controlling systems for interrogation of RFID antennas.

Abstract: According to one embodiment, an antenna apparatus comprises a first antenna element, a first lumped constant element, a first lumped constant element, a switch and at least one second lumped constant element. The first antenna element comprises a forward part, a folded part and a backward part, the forward part includes a start point connected to a feeding point, and the backward part includes an end point connected to ground. The first lumped constant element is inserted in the backward part. The switch is configured to select a current path in accordance with a control signal. The at least one second lumped constant element is to be selectively connected in parallel to the first lumped constant element through the switch.

Abstract: A folded dipole antenna capable of transmitting and receiving signals from CDMA 450 system comprises a folded dipole Printed Circuit Board (PCB) having conducting strips on each side of the PCB forming excitation and grounding arms of the antenna, having a symmetric conducting strip configuration. The conducting strip on each side of the PCB includes an m-shaped conducting strip having a center conducting leg, and two symmetrically configured folded arms. The center conducting leg is thinner in width than the two folded arms. The PCB is placed is mounted perpendicularly to a base plate through a plastic holder. A coaxial cable having a center core extended through the folded dipole PCB connects with the excitation arm and with a metal shield soldered along the center conducting leg of the ground arm.

Abstract: The present invention relates to a radio communication antenna and a radio communication device including the same. The radio communication antenna of the present invention includes first conductive wires extending in opposite directions with respect to a first direction on a substrate to form a dipole antenna, second conductive wires separated from the first conductive wires to be parallel with the first conductive wires, and stubs connected between the first conductive wires and the second conductive wires in a second direction intersecting with the first direction.

Abstract: Provided herein are devices, systems and techniques for establishing a variable height conformal antenna array having a planar backplane. More particularly, positioning of radiating elements can be made insensitive to variable ground height by selecting a suitable radiating element, such as a flared notch and arranging them to have a profile such that their outer extremities are positioned along a conformal, curved shape. Differences in radiator heights can be taken up by the addition of parallel vertical ground planes disposed between the radiating elements and the backplane. Adjacent vertical ground planes effectively form cutoff waveguide sections that naturally isolate the backplane from the radiating elements. The vertical ground planes edges effectively form a virtual curved ground for the radiating elements, following curvature of the array profile. Accordingly, heights of radiating elements are uniform with respect to the virtual ground, while being allowed to vary with respect to the backplane.

Abstract: An antenna which is advantageous for low frequency communications and suitable for use in a portable electronic device comprises an antenna resonator element and a grounding line. The resonator element is configured to resonate at a frequency f, and comprises a first port and a second port that are configured to be differentially fed. The grounding line couples a virtual node of the resonator element to ground, where the virtual node defines a negligible current when the resonator element is resonant at the frequency f. In the specific examples the antenna could be a folded monopole, a folded dipole, a loop, or other type of differential antennas. Radiation efficiency is quantified for a long folded monopole implementation which shows a marked improvement over an identical antenna without such a grounding line, particularly when used with a radio receiver.

Abstract: The present invention provides a donor antenna comprising a base plate having a top surface and a bottom surface; an array of folded dipole antenna mounted on the top surface of the base plate through a plastic holder, wherein the array of folded dipole antennas are arranged in a lattice form; and a feed network defining on the bottom surface for electrically connecting the array of folded dipole antennas to collectively feed to a connector; wherein each of the folded dipole antenna comprises a substrate having symmetrically configured conducting strips defined on the both side of the substrate forming an excitation arm and a ground arm of the folded dipole antenna.

Abstract: Some embodiments provide a relatively small antenna apparatus that acts as a passive repeater. The antenna apparatus can be designed to facilitate radio frequency (RF) signal gain for a collection or range of frequencies. In some embodiments, the antenna apparatus is placed near a device with a wireless receiver and/or transmitter, where the antenna apparatus causes increased RF signal intensity at the device by coupling RF signals from a proximate area of higher RF signal intensity into the area around the device. Accordingly, in some instances, an embodiment of the antenna apparatus can be used to increase the RF signal intensity in a null spot or dead spot by coupling RF signal energy from an area proximate to the null spot that has higher RF signal intensity.

Abstract: A high-frequency coupler includes a ground, a coupling electrode which faces the ground and is supported so as to be separated by a negligible height with respect to the wavelength of a high-frequency signal, and a resonating unit for increasing a current flowing into the coupling electrode via a transmission path, in which the coupling electrode has bent portions in places where charges with a first polarity are accumulated so that charges with a second polarity are gathered in a front face when the high-frequency signal is input to the coupling electrode and a standing wave occurs, and an infinitesimal dipole is formed, and the high-frequency signal is transmitted toward a high-frequency coupler of a communication partner side arranged to face each other so that the angle ? formed in the direction of the infinitesimal dipole is substantially 0 degrees.

Abstract: A high-frequency coupler includes a ground, a coupling electrode which faces the ground and is supported so as to be separated by a negligible height with respect to a high-frequency signal, a resonating unit for increasing a current flowing into the coupling electrode, a supporting unit which is connected to the resonating unit, and a short-circuiting unit which short-circuits the tip portions of the coupling electrode, in which an infinitesimal dipole constituted by a line connecting the center of the charges accumulated in the coupling electrode and the center of mirror-image charges accumulated in the ground is formed, and the high-frequency signal is transmitted toward a high-frequency coupler of a communication partner so that the angle ? formed in the direction of the infinitesimal dipole is substantially 0 degrees.

Abstract: An antenna sheet includes a mounting section on which an integrated circuit (IC) chip electrically connected with an antenna pattern is mounted, a first loop forming section that extends from both ends of the mounting section that holds the IC chip therebetween and forms a first loop, an intersection portion in which at least parts of both forefronts of the first loop forming section intersect with each other, and a second loop forming section that extends from the forefronts of the first loop forming section that intersect in the intersection portion and forms a second loop outside the first loop.

Abstract: An antenna and a wireless mobile communication device incorporating the antenna are provided. The antenna includes a first conductor section electrically coupled to a first feeding point, a second conductor section electrically coupled to a second feeding point, and a near-field radiation control structure adapted to control characteristics of near-field radiation generated by the antenna. Near-field radiation control structures include a parasitic element positioned adjacent the first conductor section and configured to control characteristics of near-field radiation generated by the first conductor section, and a diffuser in the second conductor section configured to diffuse near-field radiation generated by the second conductor section into a plurality of directions.

Abstract: A compact wireless communication includes a first radiating element and a second radiating element, which define and function as a dipole antenna, a feeder circuit including a wireless IC chip coupled with the first and second radiating elements, and a feeder substrate that is provided with the wireless IC chip. The first radiating element is provided to the feeder substrate. The second radiating element is provided to a substrate other than the feeder substrate.

Abstract: The wireless tag includes an antenna conductor; a first power-supply conductor which is electromagnetic-inductively coupled with the antenna conductor; and a second power-supply conductor which is loop-shaped and which is electrically coupled with the first power-supply conductor.

Abstract: A communication antenna has a rectangular radiating section, and has a structure that emits an electric field of linear polarized waves only in a vicinity of the radiating section of the antenna. An RFID tag has an IC chip and a tag antenna that is long in a predetermined direction. The tag antenna has a main antenna portion that is rectilinear and extends over substantially an entire length in a longitudinal direction of the tag antenna, and folded-over antenna portions at which currents induced by an external electric field offset one another due to portions that extend in mutually different orientations in the longitudinal direction. A parallel interval between the main antenna portion and a first folded-over antenna portion exceeds a width of the radiating section of the communication antenna.

Abstract: Disclosed are a system and a device including a dipole antenna, signal conductors and a transceiver. The dipole antenna may be enclosed in a housing, and have offset signal connections for transmitting and receiving signals. The signal conductors may be communicatively connected to the offset signal connections. The transceiver may be connected to the signal conductors through a balanced communication signal path. The impedance of the dipole antenna may be substantially gamma matched to the impedance of the balanced communication signal path and an input impedance of the transceiver according to an amount of offset of the signal connections.

Abstract: A radio-frequency (RF) device and a wireless communication device include a capacitive sensing unit capable of using a radiating element of an antenna to sensing an environment capacitance within a specified range, such that an RF signal processing device is capable of adjusting power of an RF signal accordingly, to prevent affecting a user. When the radiating element of the antenna includes a direct-current signal route to a ground terminal, the RF device and the wireless communication device further includes at least a capacitor for cutting off the direct-current signal route.