Abstract: A low cost glass mount vehicle antenna system utilizes, in a preferred embodiment, an over-coupled quasi-TEM mode transmission line coupler having two simple stamped or printed plates stacked over an L shape internal ground plane. The two conductive plates are located on opposite sides of the glass. With proper open circuit terminations on two of the four coupler ports, the backwards and forward coupling signals are redirected/combined and are effectively fed diagonally between the other two ports, thereby achieving through-glass coupling. The over-coupling achieves this efficient through-glass coupling effect at two spaced-apart frequencies (e.g. 800 MHz and 1800 MHz). The coupler is of a low impedance type and can be used with a variety of collinear array and elevated-feed antennas. It features high efficiency, low backwards radiation, and mechanical simplicity.

Abstract: An antenna device for receiving and/or transmitting dual polarized electromagnetic waves, comprising at least one antenna element (7). There are disposed parasitic elements (8, 9) of an electrically conductive material in a region, which surrounds the antenna element and includes the space between and including two parallel planes (2, 1) being defined by a ground plane layer (2) and the antenna element (7), respectively. Each parasitic element (8, 9) comprises at least one elongated, longitudinal portion, extending along an associated lateral side of the antenna element.

Abstract: An antenna, used as a voltage and power source, is designed to operate with an arbitrary load, or front end. One or more stubs are added to one or more of the antenna elements. The stubs act as two conductor transmission line and are terminated either in a short-circuit or open-circuit. Where the transmission line is odd multiples of the guided wavelength in length, the short-circuit stubs act as lumped inductors and the open-circuit stubs act as lumped capacitors. The magnitude of these lumped capacitors and inductors (reactances) is affected by a stub length, a stub conductor width, and a stub spacing. Zero or more short-circuit stubs and zero or more open-circuit stubs are added to one or more of the antenna elements to change the reactive (imaginary) part of the antenna input impedance. In a preferred embodiment, the reactive part is changed to equal the negative magnitude of the reactive part of the front end input impedance.

Abstract: An antenna for an RF transmitter is incorporated into the front door pillar trim member in a vehicle cab. This location for the antenna maximizes the transmission characteristics of the antenna. A switch and a transmitter are also preferably mounted on the trim member. The switch and transmitter are incorporated into a garage door opening system. The antenna is ideally positioned to transmit a signal to the garage door opener.

Abstract: An antenna assembly is disclosed that comprises a terrestrial antenna and a support that mounts the antenna assembly on a satellite dish antenna. The satellite dish antenna has a convex/concave configuration, a periphery, a front signal receiving surface. The terrestrial antenna comprises a pair of dipoles. The support comprising a pair of sleeves for readily receiving and supporting the pair of dipoles respectively in a substantially parallel relationship to each other, and a support variably mounting the terrestrial antenna on the satellite dish antennas of varying size and configuration.

Abstract: A microwave detector includes a horn antenna and cavity formed by covering a metallic film of a printed substrate with an opened bottom microwave circuit component, and further includes a mixer diode which is positioned at the feeding point of the horn antenna and sandwiched between the microwave circuit component and the printed substrate, the mixer diode including a mixer diode substrate having a first protruding portion at a first end of the mixer diode substrate and a second protruding portion at a second end of the mixer diode substrate, separate anode and cathode electrode patterns formed on a surface of the substrate which includes the protruding portions, and a beam-lead-type or flip-chip-type diode which is mounted to a surface of the mixer diode substrate near the center thereof, the beam-lead-type or flip-chip-type diode having an anode and a cathode which are surface mounted to the anode and cathode electrode patterns to form electrically conducting pathways therewith, wherein the first and second

Abstract: A small and durable antenna for use with radio and microwave communications is formed as a helical conductor contained in a multilayered non-ferrite ceramic chip. The dielectric constant of the ceramic is selected to match the antenna to its operating frequency, which may be in the range of 0.5 to 10.0 Gigahertz. A process for making such antennas is also disclosed. The antenna may be used in portable terminals and other devices requiring small, durable and inexpensive antennae.

Abstract: A clutch for a motor driven antenna according to the present invention includes a driving member rotated by a driving motor, a driven member for transmitting a rotating force of the driving member to an antenna element, and a clutch element for frictionally transmitting the rotating force of the driving member to the driven member. The clutch element includes recesses formed on a rotating track of one of opposing sides of the driving member and driven member, projections formed on a rotating track of the other side so as to be fitted into the recesses when the driving member and the driven member are rotated relative to each other, and anti-slip members protruded near the recesses such that a sliding frictional force caused at the tip end contact portions of the projections exceeds a maximum load of the antenna element including the driven member when the antenna element is extended or retracted.

Abstract: A phased-array antenna, particularly for the radar frequency range, comprising at least a predetermined number of transmit/receive radiator elements arranged linearly and/or matrix-shaped, a power distribution as well as a phase shifter network and a transmit/receive change-over arrangement. The transmit/receive change-over arrangement includes a serial feed comprising a waveguide with coupling in/coupling out locations disposed along its length and to which the phase shifter network, and possibly a further power distribution network, is coupled and also the transmitting/receiving arrangements are coupled. With this arrangement, an otherwise needed transmit/receive switch, for example, a circulator, is not necessary.

Abstract: This invention discloses a microwave transceiver suitable for use in an intrusion detection system including a microwave radiation generator, a printed antenna on a first side of a printed circuit board for radiating the microwave radiation generated by the microwave generator, and a ground plane on a second side of the printed circuit board and having an outer edge which is generally coextensive with an outer edge of the printed antenna.

Abstract: A small helical antenna with broad fan radiation pattern provides easy impedance matching and high radiation efficiency. It is composed of a dielectric cylinder, a plurality of radiation conductors arranged on the outer surface of the dielectric cylinder, a matching conductor arranged on the upper inner surface of the dielectric cylinder that cancels inductive reactance, and a plurality of feeder conductors arranged near the radiation conductors on the lower inner surface of the dielectric cylinder and lowering the impedance of the helical antenna.

Abstract: To obtain a high-performance antenna apparatus free from the shift of its focusing point, there are provided a plurality of pairs of horns, horns of each pair are arranged at opposite positions with respect to the center of the plurality of horns, and each pair of horns operates at a different frequency band.

Abstract: The invention comprises an antenna structure particularly suitable for mobile stations operating on two frequency ranges. As a supporting component and also as component determining the electrical characteristics the antenna includes a dielectric plate (21). On one surface of the dielectric plate there is a radiating element (22) with a meander form, and on the opposite support of the dielectric plate there is a planar radiating element (23). The operation on two frequency ranges is based on the fact that the structure has two resonance frequencies, which are relatively far from each other. The strips are further relatively wide, due to which the antenna operates satisfactorily in different positions and in the vicinity of objects. The parasitic element can further have a gap operating as a separate radiator, whereby the antenna operates on three frequency ranges.

Abstract: A personnel platform assembly and antenna support assembly for wireless communication transmitting and receiving devices such as antennas used in at least cellular telephone networks. The support assembly includes a support frame connectable upon an aerial tower which is adapted for supporting wireless communication transmitting and receiving devices thereupon. A connecting assembly is provided for fixing the support assembly at an above-ground elevation upon the aerial tower and a guide rail is suspended at a distance about the connecting assembly or central column of the tower. The guide rail is adapted for accepting a coupling to the wireless communication transmitting or receiving device and the coupling is continuously positionable along a length of the guide rail for accommodating variable positioning of the wireless communication transmitting or receiving device about the aerial tower.

Abstract: An apparatus for deploying an umbrella-type structure such as an antenna reflector is provided. The umbrella-type structure includes a plurality of rib members movable from a stowed configuration to a deployed configuration. The deployment apparatus comprises a movable deployment tube and a hub pivotally attached to the plurality of rib members and slidably attached to the deployment tube. The hub is adapted to move along the deployment tube. The deployment apparatus further includes a plurality of rib deployment straps connecting the deployment tube to the rib members and a mechanism for moving the deployment tube in order to tension the rib deployment straps which in turn pull the rib members into the deployed configuration. The apparatus includes structural members made of composite materials, having a low (near zero) coefficient of thermal expansion, low density, and high strength.

Abstract: An antenna used as a voltage and power source is designed to operate with arbitrary load, or front end. The antenna has one or more (number of) loading bars that are placed adjacent to the elements of the antenna at a spacing distance. The real part of the antenna input impedance is changed by adjusting the loading bar length, width, and/or spacing distance and/or the number of loading bars. These changes are implemented to reduce the real part of the antenna input impedance to make it small enough to develop an adequate voltage, Vp, to operated the front end and connected circuitry. In a preferred embodiment, the real part of the antenna input impedance is reduced to the point at which Vp no longer increases. One or more stubs is added to one or more of the antenna elements. The stubs act as two-conductor transmission line and is terminated either in a short-circuit or open-circuit. The short-circuit stubs act as a lumped inductor. The open-circuit stub acts as a lumped capacitor.

Abstract: This invention relates to an antenna for use in detecting electromagnetic noise radiation in which a high frequency, asymmetric signal has been generated. The invention relates to a loop antenna design which uses two loops that are run in opposite direction to each other, thereby resulting in two out-of-phase signals being detected in the loops which are then combined as the antenna output.

Abstract: Antenna system including a first antenna which is connected to a first transmit and/or receive unit and which has a natural frequency of at least approximately the value fm. The system also includes a second antenna which is linked both inductively and mechanically to the first antenna and which has a natural frequency of at least approximately the value fm. The first and second antennae are designed to be linked to another antenna system with at least a third antenna which has a natural frequency of at least approximately the value fm and which is connected to a second transmit and/or receive unit intended for the transmission of data to and/or reception of data from the first transmit and/or receive unit. At least one transmit and/or receive unit, either of the first or the second transmit and/or receive unit, is located at a route point on a public thoroughfare. The other transmit and/or receive unit is located on a vehicle driving on the public thoroughfare.

Abstract: A GPS wave antenna apparatus according to the present invention includes a substrate unit having a printed board on which an antenna constituting element including a GPS wave antenna element is mounted integrally as one component, a case having an opening portion at one end, for detachably receiving the substrate unit through the opening portion, and a conductive plate attached to the case so as to block the opening portion and arranged opposite to the GPS wave antenna element at a fixed distance therebetween. The GPS wave antenna element has a thin-film conductive pattern, and the substrate unit includes a low noise amplifier provided on the printed board and a feeder connected to a feeder section of the antenna element through the low noise amplifier.

Abstract: In the vehicle antenna, a GPS antenna, a radio wave beacon antenna for VICS/automatic rate, and an optical beacon antenna are incorporated into between the mirror of a room mirror and a cover and they are united together into an integrated body. The vehicle antenna is structured such that it is allowed to transmit and receive signals with respect to a GPS, a VICS/automatic rate beacon, and an optical beacon through the windshield of a vehicle. This structure eliminates the need to install the respective antennas of the vehicle antenna onto a vehicle body and an instrumental panel, thereby being able to improve the appearance of the interior of the vehicle. Also, since the vehicle antenna is incorporated in the room mirror, the vehicle antenna is not visible directly to the eyes of a driver and is kept from reflecting its shade into the windshield to thereby prevent interference with the driving operation of the driver.