Abstract: An antenna module comprising at least two antennas in substantial close proximity and a shield configured to reduce interference between the antennas and/or to shape the antenna coverage areas is disclosed. A substantially triangular shield with antennas positioned at each of the vertices may shape the antenna coverage areas to form virtual sectors.

Abstract: The invention relates to a vehicle mobile radio holder for mounting a mobile radio terminal in a vehicle, with the vehicle mobile radio holder having a housing with a first housing part which is shaped to hold a mobile radio terminal. The vehicle mobile radio holder also has an electrical interface for connection of an external antenna to the vehicle mobile radio holder, and a coupling antenna which is electrically connected to the interface, for non-contacting electromagnetic coupling of RF signals between the coupling antenna and the antenna of the mobile radio terminal which is inserted into the vehicle mobile radio holder. The vehicle mobile radio holder also has one or more elements for reflection of electromagnetic radiation which has been emitted from the antenna of the mobile radio terminal inserted into the vehicle mobile radio holder and has not been injected into the coupling antenna, and/or has one or more elements for absorption of this electromagnetic radiation.

Abstract: A semiconductor module includes a multilayer board, a first circuit element mounted on the multilayer board, a second circuit element stacked on the first circuit element, an interposer board, provided between the first circuit element and the second circuit element, which includes an antenna conductor, a passive element, mounted on the multilayer board, which is connected to the antenna conductor, and a molded resin layer which seals the respective elements. The antenna conductor is structured by a spiral-shaped wiring pattern and the both ends of the antenna conductor are connected to the passive element via a bonding wire. The antenna conductor functions as a loop antenna with the passive element inserted.

Abstract: A system for reducing electromagnetic interference between two or more co-located antennas is described herein. In one embodiment, the system includes a first antenna for transmitting a first signal within a first frequency band, and a second antenna for operating within a second frequency band during transmission of the first signal. The first and second frequency bands may be substantially identical, or may occupy overlapping or nearby channels within the radio frequency spectrum. The system also includes an apparatus. In one embodiment, the apparatus is positioned proximate to the second antenna for intercepting the electromagnetic energy radiated from the first antenna during transmission of the first signal. In other embodiments, the apparatus may be positioned proximate to the first antenna for intercepting the electromagnetic energy radiated from the second antenna during transmission of a second signal.

Abstract: A wireless radio transceiver which reduces interference between antennas positioned in substantially close proximity is disclosed. The exemplary radio transceiver comprises at least two radios, at least one antenna interfacing with each of the radios, at least one antenna spacer mounted to each of the antennas, and at least one shield, wherein each of the antenna spacers are mounted to one of the shields.

Abstract: A small multi-mode antenna in which a single feeding point can be used commonly for multiple frequencies and an RF module using such antenna for use in less-costly and small multimedia wireless apparatus is provided. The antenna is configured such that a single feeding point 4 which is common for multiple frequencies is set up at one end of a radiating conductor 1, a first one-port resonant circuit 2 is connected to the one end thereof, and a second one-port resonant circuit 3 is connected to the other end of the radiating conductor 1. With a conductance component of admittance in view from the feeding point 4 toward free space equaling the characteristic admittance in the RF circuit, a susceptance component of the admittance is canceled out by the resonant circuit 2 connected to the feeding point 4 for multiple frequencies.

Abstract: The invention relates to a radio communication device having at least one additional, current-conducting correction element connected to a printed board in the device. The correction element and printed board are configured in such a manner that a targeted, virtual current path elongation is brought about for an electric current induced on the printed board by electromagnetic radio fields of the antenna while the defined longitudinal and traverse dimensions of the printed board remain substantially unchanged.

Abstract: A wireless communication handset and system having improved antenna performance. The system includes a handset body (300) and multiple housing portions with different antenna loading characteristics, for example different materials or shapes, interchangeably mounted on a common portion of the handset body. The handset body (300) includes electrical communications circuitry coupled to an antenna (314), which is adjacent the interchangeable housing portions. A discrete or integrally formed antenna loading feature compensates for the different antenna loading characteristics of the different housing portions to provide optimal antenna performance regardless of the housing portions mounted on the handset body.

Abstract: A radio frequency antenna structure includes a base station antenna and an auxiliary antenna mounted within a common antenna assembly. The base station antenna is configured to transmit or receive signals in a first frequency range and to develop a main beam that is substantially wider in azimuth than in elevation, and the auxiliary antenna is configured to transmit or receive signals in a second frequency range at least partially overlapping the first frequency range and to develop an auxiliary beam at least partially overlapping the main beam. Means are included for decoupling the base station and auxiliary antennas to thereby suppress interference between the main and auxiliary beams, and for suppressing interference between the auxiliary antenna and any co-located antennas.

Abstract: An isolation shield improves the F/B ratio for a directional antenna radiating a electromagnetic wave with a wavelength of &lgr;XMT with a TE20 mode waveguide. The system includes a directional antenna and a waveguide adapted for attachment to one side of the directional antenna. The waveguide defines a channel spanning and positioned adjacent to the side of the directional antenna. The channel has a width and depth that are functions of &lgr;XMT. The waveguide excites a null in the E-field within the channel. The null being adjacent to the edge of the directional antenna and thereby improving the F/B ratio of the directional antenna.

Abstract: A radiation shielding apparatus for a wireless communication device operable in at least two cellular frequency spectrums includes a multi-band antenna operably associated with an electromagnetic radiation shield that extends along a length of the antenna. The shield partially surrounds the antenna and is disposed between a user of the communication device and the antenna.

Abstract: An apparatus for wireless data communications is provided. The apparatus comprises a substrate, a microstrip line of a quarter-wavelength, a contact pad, an impedance transformer of the quarter-wavelength, a ground plane, a loop antenna of the quarter-wavelength and a monopole antenna of the quarter-wavelength. The substrate has a first surface and a second surface opposite to the first surface. The microstrip line, the contact pad, the impedance transformer are formed on the first surface of the substrate. Both the ground plane and the loop antenna are formed on the second surface. The loop antenna is configured with one end connected to the ground plane, and another end overlapped with the microstrip line and spaced from the ground plane. The monopole antenna is attached to the contact pad.

Abstract: Reducing the maximum value of the local average SAR to be absorbed into a human body without forming a short circuit between the conductive plate and the ground conductor is accomplished in a portable radio communication device 1 that includes a circuit board necessary for performing radio communication, a shield case 2 functioning as a ground conductor that shields the circuit board, a conductive plate 3, an antenna feeding portion 4, and an antenna 5. The circuit board, shield case 2, and conductive plate 3 are enclosed by a housing made of nonconductive material. The conductive plate 3 has its both ends along the longitudinal direction electrically opened from the shield case 2.

Abstract: A radioshielded assembly contains components that require a d.c. supply and a multi-pole terminal arrangement connected between power supply terminals of the components and an external d.c. supply. At least one pole of the multi-pole terminal arrangement is fashioned for conducting a potential that differs from a reference potential. A switching stage is inserted between that pole of the terminal means that does not carry reference potential and the corresponding power supply terminals of the components. An actuation arrangement is in interactive communication with the switching stage, as a result of which the connected pole can be electrically connected to the power supply terminals or the pole can be disconnected from the power supply terminals and electrically connected to a reference potential so that interference signals cannot reach the components via the power supply lines.

Abstract: A method of producing an antenna element assembly is disclosed. The antenna element assembly (4) includes a rigid dielectric support member (1) carrying at least one radiating patch (2), the antenna element assembly being intended to be mounted onto an antenna device for transmitting and/or receiving microwave radiation. According to the invention, parasitic elements (3a, 3b) as well as the radiating patches (2) are formed onto the rigid support member by applying a conductive liquid in a screen printing process.

Abstract: An antenna system (20) provides low radio frequency interference (RFI) using an unbalanced antenna (21) comprised of three eighths wavelength whip antenna element (22) and associated counterpoise (23). Antenna counterpoise (23) may be formed by an EMI shielding conductor which is isolated at the frequency of operation of antenna system (20) from EMI shielding serving as host interface ground conductor (28) using resonant structure (25). Resonant structure (25) isolates antenna counterpoise (23) from host interface ground conductor (28) thereby improving antenna efficiency, and substantially eliminating RFI effects arising from use of antenna system (20).

Abstract: An electromagnetic interference (EMI) shield for a handheld cellular phone that is particularly useful for shielding a hearing aid against EMI from the phone's antenna. The device includes a base and a flap laminated with a metallic shielding. The base attaches to the receiver end of the cellular phone and the flap rests over the base when the phone is not in use. In operation, the flap extends away from the base forming an enclosure about the user's ear for shielding the hearing aid from EMI when the phone is in use.

Abstract: A patch antenna array capable of simultaneously receiving signals polarized in orthogonal or opposite directions, i.e. vertical and horizontal or right-handed and left-handed circular directions, comprises an electrical signal outputting means for outputting electrical signals generated in response to the orthogonally polarized signals through two output feedlines, a plurality of lower patch antennas, a lower feedline with one end that connects to the electrical signal outputting means and the other end that branches out and connects to each of the lower patch antennas, a plurality of upper patch antennas capable of receiving signals with the orthogonal polarizations in relation to signals received by the lower patch antennae, and an upper feedline with one end that connects to the electrical signal outputting means and the other end that branches out and connects to each of the upper patch antennae.

Abstract: A rotatable antenna is disclosed in which a radiator and matching network comprise a contiguous electrically conductive spring wire. The matching network comprises a coil extending generally perpendicular to the radiator. A 50 ohm coaxial cable has its ground conductor electrically connected to an electrically conductive sleeve which overlies the coil while the main conductor of the coaxial cable is tapped to the coil so that the matching network substantially matches the radiator impedance to the transmission line impedance. The matching network is rotatable with respect to a mounting member so that the radiator becomes rotatable about an axis that is generally perpendicular to the radiator.

Abstract: A dual band MDS/MMDS down converter receiving system wherein the support boom of a semi-parabolic antenna contains the down converter electronics. Located at the focal area of the semi-parabolic antenna are a pair of driven feed elements which are connected to the printed circuit board carrying the dual band down converter electronics. The dual band down converter is formed in an elongated shape to fit entirely within the formed hollow interior of the support boom. The down converter comprises a first printed circuit board which contains a low noise amplifier, two RF filters, and two diplexer filters located at the input end of the printed circuit board. The RF filters are mounted on opposite sides of the printed circuit board. The input is directly connected to the pair of driven feed elements. The RF filters are surrounded by input ground shields.

Abstract: An accessory for cellular telephones that will afford some protection to cellular telephone users from the alleged brain, head and body damage caused by the electro-magnetic radiation of cellular telephone use and to also provide a comfortable handle for using and carrying the cellular telephone.

Abstract: An integrated semi-parabolic antenna/down converter MMDS receiving system wherein the support boom of a semi-parabolic antenna contains the down converter electronics. Located at the focal area of the semi-parabolic antenna are a pair of driven feed elements which are directly connected to the printed circuit board carrying the down converter electronics. The down converter is formed in an elongated shape to fit entirely within the formed hollow interior of the support boom. The down converter comprises a first printed circuit board which contains an RF filter located at the input end of the printed circuit board. The input of the RF filter circuit is directly connected to the pair of driven feed elements by soldering the legs of the driven feed elements directly to the input of the RF filter stage on the first printed circuit board. The RF filter is surrounded by an input ground shield which covers the RF filter circuit. The shield is soldered to the top and bottom ground planes of the printed circuit board.

Abstract: An earth terminal for a satellite communication system incorporates an oval or eliptical shaped antenna 1 whose horizontal dimension d.sub.1 is greater than it's vertical dimension d.sub.2. The relatively small dimension d.sub.2 allows the antenna to be transported by road while at the same time giving a beam shape which is broader in elevation than in azimuth. This special beam shape gives certain advantages which are described in the specification.

Abstract: A portable radio transceiver and mobile mount housing are disclosed which utilize a switchless connector for connecting the portable unit to an external antenna which is electrically coupled to the mobile mount. In the preferred embodiment, the portable radio is equipped with an internal antenna which is either coupled to an electrical contact on the exterior of the portable unit adaptable to making electrical contact with a similar contact on the inside of the mobile housing when the portable radio is inserted therein. The internal antenna in the portable unit is shielded by the metallic mobile mount housing which obviates the need to disconnect the same. In one embodiment the contact disposed on the portable unit exterior is connected to a predetermined point on the internal antenna for impedance matching with the external antenna when the portable unit is inserted into the mobile mount housing.

Abstract: An electromagnetic wave radiator is provided formed by a radiating element and its supply device, both formed from a dielectric plate with median longitudinal axis, metalized on one face along two parallel strips of total width d.sub.2, wherein the supply device is formed by a slot-line placed inside a metal parallelepipedic case. The radiating element may be of the dipole type. Such a wave radiator may be used as an elementary source for an electronic sweep network antenna.

Abstract: A high current low impedance antenna having an electrically short monopole radiation pattern is provided by shielding at least one of the segments or legs of a loop antenna so that the shielded leg has no cancelation effects and thereby produces the uniform radiation pattern of a short monopole antenna.

Abstract: The invention relates to an antenna for the reception of electromagnetic radiation, for example, microwaves emanating from a geo-stationary broadcast-satellite, the antenna comprising a receiving member and a focusing member forcusing the incident radiation thereto, the receiving member comprising at least one receiving element having an insulating substrate plate, a conductive plate applied to one surface thereof and a flat, conductive pattern applied to the other surface thereof, the conductive plate and the conductive pattern being coupled with connecting terminals, wherein an impedance matching circuit is connected between the receiving member and the connecting terminals for increasing the bandwidth of the antenna.

Abstract: An electromagnetic field compensated cable having an electrically insulating casing (20, 40, 50) includes a structure (21-22, 41, 51) that effects cancellation of electric and/or magnetic field components due to current flow through the cable. One configuration includes a central twisted pair of insulated leads (21, 22) wherein only one end of each of the leads (23, 24) is terminated in a connector (25, 26). Another configuration has a central structure of conductive wire of alternating rectangular shape. (41, 51).