Core Technology, Inc.

Rdi Electronics, Inc.

Kent Britain

Robert L Diamond

Glenn D Slovenko

A printed Yagi antenna of the present invention has a circuit board, a driven element having an impedance &OHgr;d and being printed on the circuit board, a director element printed on the circuit board, a reflector element printed on the circuit board, a microstrip transmission line, and a coaxial cable having and impedance &OHgr;c. The coaxial cable feeds the driven element via the miscrostrip transmission line and &OHgr;c is approximately equal to &OHgr;d. Further, the spacing between the reflector element, the driven element, and director elements are chosen so that an optimum balance is achieved between directional gain and performance sensitivity. The printed Yagi antenna has a partial folded driven element having a J shape which is grounded at the mid-point of the longest portion of the element. The configuration allows for a coaxial cable to be attached directly to the microstrip transmission line without the use of a matching network or balun.

Yagi antenna having matching coaxial cable and driven element impedances

A local television antenna system for use with a satellite television system includes an omnidirectional antenna, a support structure for mounting the omnidirectional antenna to a satellite television dish support, and receiving circuitry mounted to the omnidirectional antenna. The omnidirectional antenna includes an antenna plate, having electrical circuit paths formed thereon, and first and second antennas having curled ends. The support structure includes a integrally-molded double clamp for providing a mechanically strong coupling to the satellite television dish support and first and second brackets for mounting to the omnidirectional antenna to provide a mechanically strong coupling. The receiving circuitry is shielded to limit interference and includes filter and amplification circuitry and one or more diplexers for combining a received local television signal with a received satellite television signal.

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Grand Prairie, TX, United States of America

Kent Britain