04647937 is referenced by 13 patents and cites 31 patents.

An antenna apparatus including a small loop antenna element fabricated by printed circuit method, a variable capacitor for matching the antenna element to broadcasting frequency and an amplifier for the received signal. The variable capacitor and the amplifier are mounted on a printed circuit board containing the loop antenna element and the variable capacitor is rotatably mounted on the board centrally of the loop antenna element. A second loop antenna element may be mounted either concentrically on the said side of the printed circuit board or on the other side of the board. A second variable capacitor cooperates with the second antenna element and a single manual element controls both capacitors.

Title
Antenna apparatus with tuned loop
Application Number
382660
Publication Number
4647937
Application Date
March 31, 1986
Publication Date
March 3, 1987
Inventor
Kenji Suehiro
Yokohama
JP
Kazutaka Hidaka
Yokohama
JP
Agent
Finnegan Henderson Farabow Garrett & Dunner
Assignee
Tokyo Shibaura Denki Kabushiki Kaisha
JP
IPC
H01Q 7/00
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