Multiple loop antenna with crossover element having a pair of sp

Details Multiple loop antenna with crossover element having a pair of sp Multiple loop antenna with crossover element having a pair of sp

1997-01-14

1999-06-22

Wong, Don

Communications: radio wave antennas

Antennas

High frequency type loops

343867, 340572, H01Q 1112

Patent

active

059146923

ABSTRACT:
A multiple loop antenna is provided which may be connected to either a transmit circuit, a receive circuit, or a transmit/receive circuit. When powered by a transmit circuit, the antenna generates radio frequency magnetic fields in an area or zone proximate to the antenna, but which are substantially canceled at a distance approximately one wavelength and more from the antenna, thereby defining a surveillance zone proximate to the antenna. Radiating loop segments of the antenna are centered around a common feed point and are geometrically symmetrical, such that currents are precisely controlled in each loop segment. A crossover element electrically connects the loop segments. The crossover element includes a pair of spaced, parallel conductors.

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