Communications: radio wave antennas – Antennas – With radio cabinet
Patent
1983-04-29
1985-05-07
Lieberman, E.
Communications: radio wave antennas
Antennas
With radio cabinet
343845, 343830, H01Q 148
Patent
active
045161275
ABSTRACT:
A low profile antenna is provided which includes a counterpoise above which are situated three parallel oriented L-shaped elements. Each of the elements includes leg and foot portions. One common end of the leg portions of the elements are electrically coupled together and to an antenna trimming stub. The remaining end of the middle element constitutes the feedpoint of the antenna together with the remaining ends of the other two elements. The dimensions of the counterpoise top surface are selected to be substantially less than one wavelength at the desired operating frequency of the antenna. In this manner, the antenna generates or is responsive to radio frequency waves exhibiting two polarizations.
REFERENCES:
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patent: 3780373 (1973-12-01), Holst et al.
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R. D. Wanselow, and D. W. Milligan, "A Compact, Low Profile, Transmission Line Antenna-Tunable Over Greater than Octave Bandwidth", IEEE Transactions on Antennas and Propagation, vol. AP-14, No. 6, Nov. 1966, pp. 701-707.
The Radio Amateur's Handbook, 1982, Chapter 19, "Transmission Lines", Sub-Title Folded Dipoles, pp. 19-4-19-5, published by the Amer. Radio Relay League, Newington, Conn.
Downey Joseph T.
Gillman James W.
Lieberman E.
Motorola Inc.
Roney Edward M.
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