Planar microwave transceiver employing shared-ground-plane anten

Details Planar microwave transceiver employing shared-ground-plane anten Planar microwave transceiver employing shared-ground-plane anten

1993-10-04

1994-12-06

Hajec, Donald

Communications: radio wave antennas

Antennas

High frequency type loops

343700MSFile, 343866, H01Q 1112

Patent

active

053715098

ABSTRACT:
A microwave intrusion detection system having a transceiver positioned to one side of a substantially conductive member and an antenna positioned on the other side of the conductive member. The antenna shares the conductive member with the transceiver by utilizing the conductive member as a reflective surface. A transmission line is included which has a strip conductor positioned to the one side of the conductive member and a dielectric material therebetween. An antenna has a substantially planar conductive member, a strip conductor positioned to one side of the conductive member, and a dielectric material sandwiched therebetween. A length of wire lies in a plane which is positioned to a second side of the conductive member and is spaced apart a distance from the conductive member. A feed probe wire couples one end of the length of wire to the strip conductor and extends through the conductive member and through the dielectric material.

REFERENCES:
patent: 3925774 (1975-12-01), Amlung
patent: 4142190 (1979-02-01), Kerr
patent: 4195301 (1980-03-01), Conroy
patent: 4644361 (1987-02-01), Yokoyama
patent: 4710750 (1987-12-01), Johnson
patent: 4853703 (1989-08-01), Murakami et al.
patent: 5023594 (1991-06-01), Wallace
Smith, Loop Antennas, Antenna Engineering Handbook, .sctn.5 (McGraw Hill, Johnson and Jasik, 2d ed. 1984).
G. Vendelin, Design of Amplifiers and Oscillators by the S-parameter Method (Wiley, 1982); out of print; no copy attached.
G. Vendelin, Microwave Circuit Design (Wiley, 1990); applicants do not have a copy.
Brochure, "DR02980 Series Transceivers", Alpha Industries of Woburn, Mass., Mar. 1991.

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