Communications: radio wave antennas – Antennas – Microstrip
Patent
1992-04-02
1995-07-04
Gregory, Bernarr E.
Communications: radio wave antennas
Antennas
Microstrip
343895, H01Q 1108
Patent
active
H00014605
ABSTRACT:
This is a microstrip antenna which eliminates the cavity used typically in spiral and sinuous type antennas. A small spacer between the antenna element and ground plane replaces the cavity. This significantly reduces the depth of the antenna and permits antenna shapes which conform to a vehicle skin, such as an aircraft. The microstrip has demonstrated higher gain and efficiency than the cavity, but only over a limited bandwidth less than that of existing cavity backed antennas. To increase the bandwidth, the antenna has a variable thickness spacer with the thickness proportional to the distance from the center of the antenna. The employment of this variable spacer results in maintaining the high gain and efficiency of the microstrip antenna over a much larger bandwidth comparable to the existing cavity backed antennas.
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Franz Bernard E.
Gregory Bernarr E.
The United States of America as represented by the Secretary of
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