Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1976-06-04
1978-02-14
Engle, Samuel W.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 16LS, 343117A, H04B 710
Patent
active
040742660
ABSTRACT:
A system for receiving through a single antenna apparatus a direct radio wave and reflected radio waves arriving from the same radio wave source, in which the resultant level of the direct radio wave and the reflected radio waves is detected under a condition where the directivity characteristic of the antenna apparatus is slightly altered at the arrival bearing of the reflected radio waves at intervals sufficiently shorter than that of fading perculiar to the paths of the direct wave and reflected waves, and the directivity characteristic of the antenna apparatus is modified at the arrival bearing of the reflected radio waves to raise the resultant level by the use of error voltages of the above intervals each indicative of the polarity of a difference between the directivity pattern of the antenna apparatus and an optimum pattern.
REFERENCES:
patent: 2929058 (1960-03-01), Blasberg et al.
patent: 3036210 (1962-05-01), Lehan et al.
patent: 3140490 (1964-07-01), Sichak et al.
patent: 3357018 (1967-12-01), Villard, Jr.
patent: 3528012 (1970-09-01), Kahn
patent: 4005426 (1977-01-01), White
Shiokawa Takayasu
Yokoi Hiroshi
Burns Robert E.
Cangialosi S. A.
Engle Samuel W.
Kokusai Denshin Denwa Kabushiki Kaisha
Lobato Emmanuel J.
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