Abstract: An antenna includes feed pads; a radiating portion disposed on one side of the feed pads and spaced apart from the feed pads, the radiating portion being constituted by a single conductor plate; and a ground part disposed on an opposite side of the feed pads from the radiating portion; wherein each of the feed pads has a polygonal shape.

Abstract: An apparatus is disclosed for an antenna with a conductive cage. In an example aspect, the apparatus includes a ground plane with at least one opening. The apparatus also includes at least one antenna assembly with at least one radiating element, at least one feed via, and a conductive cage. The radiating element is implemented on a first plane that is substantially parallel to the ground plane. The feed via is connected to the at least one radiating element and is configured to connect to at least one transmission line through the opening. The conductive cage includes at least three ground vias, which are connected to the ground plane at positions that are distributed around the opening. Lengths of the at least three ground vias extend a portion of a distance between the ground plane and the radiating element.

Abstract: An antenna includes feed pads; a radiating portion disposed on one side of the feed pads and spaced apart from the feed pads, the radiating portion being constituted by a single conductor plate; and a ground part disposed on an opposite side of the feed pads from the radiating portion; wherein each of the feed pads has a polygonal shape.

Abstract: A switchable dual polarization patch antenna with improved cross polarization isolation to concurrently radiate horizontally polarized signals and vertically polarized signals. A planar conductor is arranged with a first terminal and a second terminal that are vertically spaced on a portion of the planar conductor to radiate a component of a vertically polarized signal with zero degrees of phase shift from one of the two terminals and radiate another component of the vertically polarized signal having a 180 degrees of phase shift from the other of the two terminals. A hybrid coupler can provide the 180 degrees of phase shift. A horizontally polarized signal is radiated from a third terminal that is horizontally spaced on another portion of the planar conductor and coupled to a horizontally polarized signal source. The direction of the 180 phase shift for the first and second components of the vertically polarized signal may be selected.

Abstract: Portals and other chokepoints can be monitored with RFID reader systems. A portion of an RFID reader system capable of generating multiple beams can be mounted between two adjacent chokepoints such that some beams are associated with one chokepoint while other beams are associated with the other chokepoint. When replies from an item are received, the item can be associated with a chokepoint based on parameters or characteristics associated with the replies and/or the beam(s) on which the replies are received. If the detected item is moving, its movement direction through the chokepoint and/or its movement speed may also be determined.

Abstract: An antenna to communicate at a defined frequency; a feed point; and a near-field coupler array coupled to the feed point is described. The near-field coupler array may include a substrate; a ground plane on a first side of the substrate; and a near-field coupler array disposed on a second side of the substrate. The ground plane may include a first aperture and a second aperture. The near-field coupler array can include a first coupler element aligned with the first aperture and a second coupler element aligned with the second aperture. A first width of the first coupler element can be larger than a second width of the first aperture. A third width of the second coupler element can be larger than a fourth width of the second aperture. The first width and the third width can have a correlation to the defined frequency.

Abstract: A distributed continuous antenna for wireless communication includes a first section of coaxial cable having a center conductor and an outer shield; and an antenna lead having a first end electrically connected at an injection point of the outer shield of the coaxial cable, and having a second end configured to be coupled to a device radio for the purpose of transmitting or receiving signals using the outer shield of the coaxial cable as an antenna for the device radio. The distributed continuous antenna might include a plurality of leads electrically connected to the outer shield of the coaxial cable at a first end and configured to have a second end coupled to a device radio for the purpose of transmitting or receiving signals using the outer shield of the coaxial cable as an antenna for the device radio.

Abstract: An antenna includes a ground support, an electrically conductive, endless element mounted at a distance relative to the ground support, and a trio of ports arranged along the endless element for conveying radio frequency signals in an operating band of frequencies. The antenna is compact and has high port isolation and low pattern correlation due to successively spacing the ports apart along the endless element by a spacing of one-half of a guided wavelength at a center frequency of the operating band.

Abstract: An antenna array, especially for use with a radio frequency identification reader, includes a ground plane and a pair of concentric, first and second, circular elements mounted at an elevation relative to the ground plane. First ports are arranged along the perimeter of the first element, and second ports are arranged along the perimeter of the second element. Each port conveys radio frequency signals in an operating band of frequencies. Each perimeter is substantially equal to an odd multiple of one-half of a guided wavelength at a center frequency of the respective operating band. Each adjacent pair of first ports, or adjacent pair of second ports, is successively spaced apart by a spacing constituting a whole multiple of one-half of the guided wavelength at the center frequency of the respective operating band. A polarized patch antenna may be positioned within the circular elements.

Abstract: A communication structure may include a mobile terminal ground plane including a ground point. A primary radiator is electrically coupled to the ground point. A first antenna branch includes a first filter circuit that is coupled between a first point on the primary radiator and a first antenna port and that corresponds to a first frequency band. A second antenna branch includes a second filter circuit that is coupled between a second point on the primary radiator and a second antenna port that corresponds to a second frequency band that is different from the first frequency band. In addition, a radio frequency (RF) transmitter and/or receiver may be provided with the ground plane and the primary radiator being electrically coupled to the RF transmitter and/or receiver.

Abstract: A method is capable of controlling signal transmission for multiple electronic devices in a system such as a satellite distribution system. According to an exemplary embodiment, the method includes steps of receiving a signal indicating a request from a device, changing an operating state of a signal source to be compatible with an operation of the device in response to the signal, and providing a signal path between the device and the signal source in response to the signal.

Abstract: A coupling area enhancement device includes a small coil and a large coil on opposing sides of a sheet of electromagnetic interference (EMI) absorptive material. The coupling area enhancement device may include one or more holes and may include adhesive material and sticker covers. Placement of the coupling area enhancement device may be accomplished by sticking the small coil to a host device near a contactless antenna. The large coil may also be stuck to a battery cover.

Abstract: A patch antenna includes a dielectric substrate having a body that extends a thickness from a first side to a second side that is opposite the first side. The body of the substrate includes thru openings that extend through the thickness of the body. A radiating patch is positioned on the first side of the body of the substrate. The radiating patch includes holes that are aligned with corresponding thru openings of the body of the substrate. A ground plane is positioned on the second side of the body of the substrate. At least three feed probes are electromagnetically coupled to the radiating patch such that the patch antenna is configured to generate a circularly polarized radiation pattern. Each feed probe includes a conductive path that extends within a corresponding thru opening of the body of the substrate from the second side of the body to the first side of the body. Each conductive path being exposed along the first side of the body via the holes of the radiating patch.

Abstract: Various embodiments of a patch antenna, element thereof and method of feeding therefor are described. In general, the patch antenna is configured to generate orthogonal beams and comprises an array of patch elements each contributing to the orthogonal beams and comprising one or more resonators, a base reflector, and a dual feed mechanism. The dual feed mechanism generally comprises two pairs of feeding elements, each one of which comprising substantially balanced feeds configured to drive a respective one of the orthogonal beams via substantially anti-phase capacitive coupling.

Abstract: An antenna designing method and a data card single board of a wireless terminal are provided. The antenna designing method provided by an embodiment of the present invention includes: dividing a semi-closed area without other metal wirings on a data card single board of the wireless terminal; and arranging an antenna wiring in the semi-closed area, where a gap exists between the antenna wiring and the data card single board, and the antenna wiring is coupled with the data card single board via the gap. The embodiments of the present invention also disclose a data card single board of the wireless terminal. According to the embodiments of the present invention, a Specific Absorption Rate (SAR) value of the antenna is reduced, and meanwhile, a working bandwidth of a broadband is realized.

Abstract: A wireless communication device whose impedance can be matched with an arbitrary load impedance and that can be broadened in operating frequency band even when choosing an input impedance of an IC chip freely is not possible. The wireless communication device includes: a first conductor; a second conductor disposed substantially parallel to the first conductor; a hole formed in the second conductor; a capacitive coupling mechanism disposed adjacent to the hole; and a communication circuit which has at least one of a radio wave transmitting function and a radio wave receiving function. The communication circuit is connected through the capacitive coupling mechanism to two sites on the second conductor that are near borders between the second conductor and the hole.

Abstract: An antenna may be formed from conductive regions that define a gap that is bridged by shunt inductors. The inductors may have equal inductances and may be located equidistant from each other to form a scatter-type antenna structure. The inductors may also have unequal inductances and may be located along the length of the gap with unequal inductor-to-inductor spacings, thereby creating a decreasing shunt inductance at increasing distances from a feed for the antenna. This type of antenna structure functions as a horn-type antenna. One or more scatter-type antenna structures may be cascaded to form a multiband antenna. Antenna gaps may be formed in conductive device housings.

Abstract: A communication structure may include a mobile terminal ground plane including a ground point. A primary radiator is electrically coupled to the ground point. A first antenna branch includes a first filter circuit that is coupled between a first point on the primary radiator and a first antenna port and that corresponds to a first frequency band. A second antenna branch includes a second filter circuit that is coupled between a second point on the primary radiator and a second antenna port that corresponds to a second frequency band that is different from the first frequency band. In addition, a radio frequency (RF) transmitter and/or receiver may be provided with the ground plane and the primary radiator being electrically coupled to the RF transmitter and/or receiver.

Abstract: A distributed continuous antenna for wireless communication includes a first section of coaxial cable having a center conductor and an outer shield; and an antenna lead having a first end electrically connected at an injection point of the outer shield of the coaxial cable, and having a second end configured to be coupled to a device radio for the purpose of transmitting or receiving signals using the outer shield of the coaxial cable as an antenna for the device radio. The distributed continuous antenna might include a plurality of leads electrically connected to the outer shield of the coaxial cable at a first end and configured to have a second end coupled to a device radio for the purpose of transmitting or receiving signals using the outer shield of the coaxial cable as an antenna for the device radio.

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 broadband antenna system is disclosed. The antenna system relates to a modified conical structure, wherein the feed region of the cone is cut away to form a hollow “coneless” cylinder, and the distribution of one or more tapered feed points around the circumference of the cylinder allows a plurality of feed lines, cables, piping, or other structures to be run through the center of the antenna without interfering with the performance of the antenna system. The invention further relates to a stacked broadband antenna system wherein additional coneless elements, as well as other types of antennas or devices, may be stacked collinearly on, or disposed coaxially to, the cylindrical antenna structure, and fed, powered or operated via the plurality of feed lines, cables, piping or other structures. The overall system may thus provide a wide range of transmitting, receiving, sensing and other capabilities.

Abstract: A strain-resistant electrical connection and a method of making the same is provided. An antenna (36, 38) or other conductive lead is connected to a circuit (32) in a manner that makes the connection more resistant to mechanical stresses such as movement or rotation of the antenna (36, 38) or conductive lead relative to the circuit (32). The antenna (36, 38) or conductive lead is at least partially coiled to provide additional ability to withstand mechanical stresses. The antenna (36, 38) or conductive lead may be encase along with is connected circuit in an elastomeric material.

Abstract: A frequency-tunable antenna includes a radiating element, a feeding terminal, a first ground terminal and a second ground terminal. The radiating element includes a first segment, a turning segment and a second segment. The turning segment is interconnected between the first segment and the second segment. The feeding terminal is disposed at the first segment of the radiating element, and electrically connected with the radiating element and the circuit substrate. The first ground terminal disposed beside the feeding terminal. The second ground terminal is arranged between the first ground terminal and the turning segment of the radiating element. A radio frequency switch mounted on the circuit substrate is selectively connected with either the first ground terminal or the second ground terminal, so that the frequency-tunable antenna transmits and receives a wireless signal in first frequency band or a second frequency band.

Abstract: A quad-fed patch antenna is disclosed, including a ground plane and a substantially tetragonal radiating patch spaced from the ground plane, an upper surface of the substantially tetragonal radiating patch having a first side, a second side, a third side, and a fourth side defining a first corner, a second corner, a third corner, and a fourth corner located within a second plane substantially parallel to the ground plane. A signal feed is associated with the each side of the substantially tetragonal radiating patch, wherein the first signal feed, the second signal feed, the third signal feed and the fourth signal feed are fed progressively in phase quadrature.

Abstract: An antenna may be formed from conductive regions that define a gap that is bridged by shunt inductors. The inductors may have equal inductances and may be located equidistant from each other to form a scatter-type antenna structure. The inductors may also have unequal inductances and may be located along the length of the gap with unequal inductor-to-inductor spacings, thereby creating a decreasing shunt inductance at increasing distances from a feed for the antenna. This type of antenna structure functions as a horn-type antenna. One or more scatter-type antenna structures may be cascaded to form a multiband antenna. Antenna gaps may be formed in conductive device housings.

Abstract: A grid array antenna configured to operate with millimetre wavelength signals, the grid array antenna comprising a plurality of mesh elements and at least one radiation element; each mesh element comprising at least one long side and at least one short side operatively connected to the at least one long side; at least one of: the at least one radiating element, the at least one short side, and the at least one long side having compensation for improved antenna output for improved antenna radiation.

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: Various embodiments of a patch antenna, element thereof and method of feeding therefor are described. In general, the patch antenna is configured to generate orthogonal beams and comprises an array of patch elements each contributing to the orthogonal beams and comprising one or more resonators, a base reflector, and a dual feed mechanism. The dual feed mechanism generally comprises two pairs of feeding elements, each one of which comprising substantially balanced feeds configured to drive a respective one of the orthogonal beams via substantially anti-phase capacitive coupling.

Abstract: A wireless communication device whose impedance can be matched with an arbitrary load impedance and that can be broadened in operating frequency band even when choosing an input impedance of an IC chip freely is not possible. The wireless communication device includes: a first conductor; a second conductor disposed substantially parallel to the first conductor; a hole formed in the second conductor; a capacitive coupling mechanism disposed adjacent to the hole; and a communication circuit which has at least one of a radio wave transmitting function and a radio wave receiving function. The communication circuit is connected through the capacitive coupling mechanism to two sites on the second conductor that are near borders between the second conductor and the hole.

Abstract: An integrated circuit transmission system includes a dielectric substrate wave guide and first and second substrate antennas. A substrate transmitter is operable to produce an radio frequency (RF) signal, the RF signal having first and second components. A micro-strip resonator filter module generates a filtered RF signal by adjusting phases of the first and second components of the RF signal via selection of one of a plurality of selectable tap points. A third substrate antenna generates a beam formed signal for transmission through the dielectric substrate wave guide, wherein the beam form signal is directed, via the filtered RF signal, to either the first substrate antenna or the second substrate antenna.

Abstract: An antenna includes an antenna element in which predetermined electrodes are formed on a dielectric base; and a substrate in which predetermined electrodes are formed on a base. On a top surface of a non-ground area of the substrate, a power supply terminal connection electrode is formed so as to be connected to a power supply terminal formed on a bottom surface of the antenna element, and a ground terminal connection electrode is formed so as to be connected to a ground terminal formed on the bottom surface of the antenna element. On a bottom surface of the non-ground area of the substrate, capacitance-forming electrodes are formed at positions opposed to the power supply terminal connection electrode and the ground terminal connection electrode, respectively. By capacitances caused by the capacitance-forming electrodes, being loaded to radiation electrodes, respectively, a resonant frequency in a fundamental mode can be set independently of a resonant frequency in a harmonic mode.

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 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: An antenna may be formed from conductive regions that define a gap that is bridged by shunt inductors. The inductors may have equal inductances and may be located equidistant from each other to form a scatter-type antenna structure. The inductors may also have unequal inductances and may be located along the length of the gap with unequal inductor-to-inductor spacings, thereby creating a decreasing shunt inductance at increasing distances from a feed for the antenna. This type of antenna structure functions as a horn-type antenna. One or more scatter-type antenna structures may be cascaded to form a multiband antenna. Antenna gaps may be formed in conductive device housings.

Abstract: A data transmission device using electromagnetic wave radiation in a contactless transceiver system toward a contactless object, the data bits transmitted corresponding to the half cycle of an initial time interval during which electromagnetic waves are emitted at a predetermined carrier frequency and to a second splitting time interval during which there is a split in transmission of the electromagnetic waves at the predetermined carrier frequency. During said second splitting time interval, generation means (40, 42, 44, 46, 48) generate electromagnetic waves having a frequency which is double the predetermined carrier frequency resulting in an attenuation of the radiated field by the antenna greater than a predetermined value such as 30 dB.

Abstract: A flat panel antenna, monopole or dipole, formed from a conductive loaded resin-based material containing micron conductive powders or micron conductive fibers to provide conductivity. The monopole antenna has an antenna element having an outer periphery with a length equal to an integral multiple of a quarter wavelength of the desired center frequency of the antenna. A bobbin, also formed of the conductive loaded resin-based material, and is attached to the antenna element by connection elements. A coil of conductive wire, having two ends connected to a coaxial cable, is wound around the bobbin. The coaxial cable can deliver power to a radiating antenna or extract power from a receiving antenna. The dipole antenna has first and second antenna elements both formed of conductive loaded resin-based material. The peripheries of the first and second antenna elements have lengths equal to an integral multiple of a quarter wavelength of a first and second frequency.

Abstract: In order to feed at four points to a loop portion (12) made of conductor formed around a central axis (O) in a loop fashion along a peripheral surface of a cylindrical body (11) formed by rounding a flexible insulator film member (20) around the central axis in a cylindrical fashion, each of four feeders (13) formed on the peripheral surface of the cylindrical body comprises a vertical feeding portion (131) having one end (131a) grounded and another end (131b) extending toward the loop portion, a zigzag line (132) disposed between the other end of the vertical feeding portion and the loop portion, a tap (133) for feeding from a feeding terminal (13a) to the vertical feeding portion.

Abstract: An electromagnetic coupling type four-point feeding loop antenna (10) comprises a cylindrical body (11) formed by rounding a flexible insulator film member (20) around a central axis (O) in a cylindrical fashion and a loop portion (12) made of conductor that is formed on the cylindrical body along a peripheral surface thereof around the central axis in a loop fashion. In order to feed to the loop portion at four points, four feeders (13) are formed on the peripheral surface of the cylindrical body. Between the loop portion and each of the four feeders, a gap (&dgr;1) is provided, whereby carrying out feed to the loop portion by electromagnetic coupling.

Abstract: An antenna device is constructed such that a short circuit exists between an antenna formed on an outer surface of a dielectric substrate and an input end side resonance electrode of a filter section formed on the inside of the dielectric substrate. An output end side resonance electrode of the filter section and an output electrode are coupled to one another via a capacitance. Accordingly, noise current is not allowed to flow to an electronic circuit, which is connected to the antenna device.

Abstract: A antenna system is provided, including a substantially annular antenna element having an inner perimeter edge. The antenna system also includes a two-dimensional amplifier system coupled to the inner perimeter edge of the antenna element. The two-dimensional amplifier system may comprise a plurality of one-dimensional amplifiers, each one-dimensional amplifier being coupled to the inner perimeter edge of the antenna element at substantially equally spaced angular positions. The two-dimensional amplifier system may also comprise a two-dimensional field effect transistor. The antenna element and two-dimensional amplifier system are configured to either receive or transmit a wave having a carrier frequency and an electric field vector, the terminus of which traces a nonlinear path within a plane transverse to an axis of wave propagation at an angular velocity corresponding to a rotation frequency between the carrier frequency and zero.

Abstract: A small antenna for portable radios and the like in which two planar conductive boards are disposed in parallel relationship at a spaced interval which is small when compared with received radio wavelengths. A dielectric frame is disposed between the two planar conductive boards keeping them at the preselected spaced interval. Arbitrary feeding points are selected along the edges of the two conductive boards and at least one conductor is positioned at an arbitrary selected feeding point to short-circuit the two conductive boards. In some cases a plurality of arbitrary feeding points may be selected along the edges of the two conductive boards and a plurality of conductors positioned at the plurality of arbitary selected feeding points which short-circuits the conductive boards. The positions of the plurality of conductors which short-circuit the conductive boards may be automatically changed at will to provide the most desirable condition responsive to the direction of the radio waves.

Abstract: An omnidirectional multiple-band antenna for use with a plurality of simultaneously operating transceivers wherein a common conductor mast is excited by a plurality of stub-elements arranged therearound and each sized and spaced to excite a half-wave portion of the mast.