Abstract: An antenna system, with a loop antenna and a loop current, is provided for transmitting an electromagnetic signal through a medium. The loop antenna has an E field transducer that generates an E field, and an H field transducer that generates an H field. The E and H fields are orthogonal in space and have at least one of a magnitude and phase relationship that is matched to an intrinsic impedance of a medium to generate a propagating wave. In an insulating medium the loop current lags an E field plate voltage by 90° to produce in phase E and H fields. In a conductive medium current is applied to the loop with a 135° phase lag with respect to a voltage across the E field plates. The H field is generated by the current component and leads current by 90°.

Abstract: A multi-frequency antenna comprising an IMD element, active tuning elements and parasitic elements. The IMD element is used in combination with the active tuning and parasitic elements for enabling a variable frequency at which the antenna operates, wherein, when excited, the parasitic elements may couple with the IMD element to change an operating characteristic of the IMD element.

Abstract: A portable antenna system includes an antenna that is substantially defined by one or more portions that include electrically conductive self-similar extensions. The system also includes an article of clothing in which the antenna is attached to a surface of the article of clothing such that electrically conductive self-similar extensions extend across the surface of the article of clothing.

Abstract: A mobile radio apparatus using a circuit board in a cabinet as an antenna and being capable of providing a good antenna characteristic when the mobile radio apparatus is closed for entering a portable mode is provided. In a mobile radio apparatus, an upper circuit board is housed in an upper cabinet, a lower circuit board is housed in a lower cabinet, the upper and lower circuit boards and are electrically connected, an antenna section is housed in an upper part of the lower cabinet, a feeding section for supplying power to the antenna section is housed in the lower cabinet, and in a portable mode with the upper cabinet and the lower cabinet stacked on each other, the feeding section is connected to the antenna section and in a conversation mode in which the joint whole length is grown as the upper cabinet and the lower cabinet are changed in the mutual position, the feeding section is connected to the upper circuit board through the antenna section and a connection member.

Abstract: Systems and methods are disclosed for miniature transponders having capsule enclosure housings including a magnetic antenna core, such as a ferrite core, with a shaped form to provide space for an integrated circuit also included within the capsule enclosure housing. In addition, metal wire windings surround the antenna core, and these wires can be direct bonded to connections on the integrated circuit. Further, a stabilizing epoxy or other material can be inserted within the capsule enclosure housing to secure the antenna core and the integrated circuit within the capsule enclosure housing.

Abstract: An antenna system includes first and second antennas that are arranged on a substrate and that include an arc-shaped element having a concave side and a convex side, a conducting element that extends substantially radially from a center of said concave side, and a U-shaped element having a base portion with a center that communicates with said conducting element and two side portions that extend from ends of said base portion towards said concave side. Third and fourth antennas are arranged on said substrate and include an inner ring and an outer ring that is concentric to said inner ring.

Abstract: Various embodiments are described of an antenna including a common ground plane, a first set of N approximately resonant elements with a length I2 and a second set of M approximately resonant elements with a length I1. The first set of N approximately resonant elements are wound to form a first helix with an initial diameter d2 and a height h2. The second set of M approximately resonant elements are wound in the opposite direction to the first set of N approximately resonant elements to form a second helix. The second helix is centrally disposed within the first helix, and d1 is less than d2 and h1 is greater than h2.

Abstract: A medical device and system is provided with a device housing and with a radio frequency detection device. The radio frequency detection device is functionally connected to an antenna for detecting a radio frequency identification element. The radio frequency detection device has a transmitter and an at least partly electrically conductive shield, which encloses at least the transmitter such that a field generated by the transmitter is effectively shielded towards the outside and the antenna is arranged within the housing and outside the shield.

Abstract: Embodiments of the invention may provide for a variety of antennae structures, including the following: a) antennae structures printed directly on the sides of the radio frequency (RF) module or integrated passive device (IPD), b) printed antennae structures fabricated on preformed dielectric lids or overmolds, c) antennae structures fabricated as part of the dielectric wiring that constitutes the wireless module, d) antennae structures that are printed directly on the top of the finished RF module, and e) antennae structures printed directly on the dielectric layers adjacent to thin film wiring and embedded passive elements such as filters, diplexers and couplers.

Abstract: Disclosed is a transmission line loaded dual-band monopole antenna, which realizes operation in dual bands with a single antenna. The dual-band monopole antenna includes a monopole antenna and a transmission line load. The monopole antenna has a signal feeding terminal and a load connection terminal. The load connection terminal is connected to the transmission line load. The transmission line load includes a core transmission line, an outer circumferential conductor, and a short-circuit section. The core transmission line has an antenna connection terminal and a short-circuit terminal. The antenna connection terminal is connected to the load connection terminal of the monopole antenna. The outer circumferential conductor circumferentially surrounds and is spaced from the core transmission line and the outer circumferential conductor has an open terminal and a short-circuit terminal.

Abstract: An antenna system includes first, second, and third antennas that are arranged on a substrate and that include an arc-shaped element having a concave side and a convex side, a conducting element that extends substantially radially from a center of the concave side, and a U-shaped element having a base portion with a center that communicates with the conducting element and two side portions that extend from ends of the base portion towards the concave side.

Abstract: An antenna apparatus is disclosed. The antenna apparatus is structured by a ground plate that is shaped like a plate, and a feeding unit that is formed by a plate-like member, the feeding unit extending from the ground plate generally perpendicular to the ground plate at a predetermined angle to the ground plate for a predetermined length.

Abstract: The present invention relates to a compact multiband antenna constituted by a first dipole type element comprising a first conductive arm connected to a second conductive arm having the shape of a box, mounted on a ground plane, the first and the second arms being supplied differentially and a second element of the slot type realized on said ground plane in the extension of said second arm.

Abstract: A capacitive-power-feeding-type radiating electrode is provided on a dielectric substrate, and the dielectric substrate is provided in a non-ground region of a circuit board. In the non-ground region of the circuit board, a ground line electrically connecting the radiating electrode with a ground electrode of the circuit board is provided. The ground line is shaped so as to have at least one turnback portion. On the ground line, a resonant-frequency adjusting element is arranged so as to shortcut a portion of the ground line. The resonant-frequency adjusting element has a capacitance or inductance so as to adjust a resonant frequency of an antenna structure to a predetermined resonant frequency.

Abstract: An array antenna with an embedded subaperture includes an array of radiator elements. The array includes a subaperture of one or a group of the radiator elements. A main receive channel is coupled to at least some of the radiator elements by a feed network. An RF power dividing network is connected in a signal path between the subaperture and the special use receive channel, and is adapted to allow at least most of the RF energy from the subaperture to pass to the special use receiver channel while diverting a small amount of energy to the main receive channel. The array includes circuitry for introducing an amplitude taper to signals received from the array of radiator elements, so that some of the signals from the radiator elements are attenuated to achieve the amplitude taper.

Abstract: A communication device (110, 210) has an antenna (150, 152, 250, 252) positioned on a multilayer substrate/printed circuit board (154, 254, 254?). A first high frequency material (116, 216) is disposed over a first side of the substrate (154, 254) characterized for low frequency devices. A conductive layer (118, 218) is patterned over the first high frequency material (116, 216), defining first and second circuit traces (122, 124, 222, 224) and first and second antenna traces (132, 134, 232, 234). The first and second antenna traces (132, 134, 232, 234) define a first slot (116, 216) in the first conductive layer (122, 222), which is aligned with a cutout (162, 262) defined by the substrate (154, 254). One of a transmitter (112, 212) and a receiver (114, 214) are disposed over the high frequency material (116, 216) and coupled to the edge emitting antenna (150, 250) by the first and second circuit traces (122, 124, 222, 224).

Abstract: An integrated antenna for worldwide interoperability for microwave access (WiMax) and wireless local area network (WLAN), includes a substrate, a grounding metal strip, and first and second radiating metal strips. The first radiating metal strip is disposed on the substrate and is not connected to the grounding metal strip. The first radiating metal strip has a first portion and a second portion on two ends thereof. The first and second portions are used to induce first and second resonance modes, respectively. The second radiating metal strip is disposed on the substrate and is connected to the grounding metal strip. The second radiating metal strip is not connected to the first radiating metal strip. The energy is coupled from the second radiating metal strip to the first radiating metal strip to induce a third resonance mode. The antenna is adapted to the frequencies of WiMax and WLAN.

Abstract: An antenna is provided for operating within the electrically small antenna regime (i.e., ka?0.5), and having bandwidth performance quite close to fundamental limits. The antenna of the invention, in various embodiments, is based upon spherical resonator structures that are characterized by a performance factor (Q/Qchu,) close to 1.5. The antenna combines a resonator structure determined according to the method of the invention with an appropriate transmission line feeding arrangement, such that the resonator effectively couples the transmission line mode to the radiating spherical harmonic mode in an impedance-matched manner.

Abstract: According to one embodiment, an information processing apparatus including a main body to be detachably docked with an external apparatus including a first antenna and a first radio communication unit which performs radio communication by using the first antenna, a second antenna provided in the main body, a third antenna provided in a predetermined position in the main body, which is closer to the first antenna than to the second antenna, when the main body is docked with the external apparatus, and a second radio communication unit which is provided in the main body, and communicates by radio with the external apparatus by using the third antenna, when the main body is docked with the external apparatus.

Abstract: According to various aspects, exemplary embodiments are provided of antenna assemblies. In one exemplary embodiment, an antenna assembly suitable for installation to a vehicle body wall generally comprises a chassis, a radome, and a shield disposed generally between the chassis and radome. Two or more resiliently compressible bumpers are spaced apart and compressively sandwiched generally between the radome and the shield. Compression of the bumpers generates a compressive force urging the shield generally towards the chassis that aids in electrically grounding of the shield with the chassis.