Communications: radio wave antennas – Antennas – With spaced or external radio wave refractor
Patent
1986-04-22
1988-10-11
Blum, Theodore M.
Communications: radio wave antennas
Antennas
With spaced or external radio wave refractor
343700MS, H01Q 1906
Patent
active
047774908
ABSTRACT:
Antennas chiefly intended for microwave and millimeter-wave use include geometric-shaped conductive patches on one broad surface of a planar semiconductor substrate. The other broad side of the substrate bears a conductive ground plane. Monolithic PIN diodes are formed by doping the substrate at various points between the conductive patch and the ground plane. Biasing arrangements affect the conduction of the PIN diodes thereby affecting or tuning the optimum operating frequency, the radiation pattern, and/or the impedance of the antenna. In a particularly advantageous configuration, the PIN diodes have lateral dimensions greater than or equal to one-tenth wavelength (.lambda./10) at the operating frequency. Distributed diodes have lower resistance and reactance than discrete or discrete monolithic diodes, thereby providing improved radiating characteristics, and have a relatively large power-handling capability which makes them useful for power transmission.
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An Article Entitled "Optical Control of Microwave PIN Diode and its Applications" by Sykes et al. Presented at the Benjamin Franklin Symposium in Philadelphia in May 1985.
Sharma Arvind K.
Stabile Paul J.
Blum Theodore M.
Davis Jr. James C.
General Electric Company
Steckler Henry I.
Webb II Paul R.
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