Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1984-04-06
1985-09-10
Epstein, Henry F.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
244 1TD, 273360, F41J 910
Patent
active
045409870
ABSTRACT:
An aerial towed battle target having a mechanism for radar detection and including a hollow body which is reinforced in the front in a ring-like manner and is composed of sewn together woven lengths of fabric into which are integrated elongated metal elements. The hollow body has a base and towing gear associated with the front. The problem with heretofore known targets is locating and taking bearings with shortwave radio beams during approach and take-off when the direction of flight coincides extensively with the beam direction. To improve the inventive target in this respect, the elongated metal elements are contained in the fabric lengths as weft threads which are disposed essentially transverse to the direction of towing. These metal weft threads are incorporated between the woven weft threads, with the spacing between the metal threads increasing over the length of a woven fabric pattern uniformly from a relatively small dimension to a relatively large dimension. With regard to the increase of the spacing between the picked or shot-in metal elements, the fabric lengths are alternately reversed.
REFERENCES:
patent: 1860982 (1932-05-01), Binnie
patent: 2402156 (1946-06-01), Griesinger
patent: 2412562 (1946-12-01), Crawshaw
patent: 2731046 (1956-01-01), Bachner
patent: 2907095 (1959-10-01), Frey
patent: 4184681 (1980-01-01), Graham, Jr.
patent: 4195798 (1980-04-01), Costantino et al.
patent: 4205848 (1980-06-01), Smith et al.
Nohren Hubert
Werkes Heinz
Autoflug GmbH
Epstein Henry F.
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