Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1974-08-21
1976-05-04
Hubler, Malcolm F.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343100ET, G01S 740
Patent
active
039551997
ABSTRACT:
A doppler/range simulator for use in testing aircraft systems based on the rinciple that an ionized gas absorbs microwave radiation and thus becomes raised to higher energy levels, and when falling back to the original energy state the ionized gas re-radiates the absorbed microwave energy. A frequency control simulates a doppler or velocity signal. A voltage or current control simulates the time delay or altitude range signal.
The test set is in the form of a light-weight anechoic chamber lined on the inside with energy absorbant material except for the top. Within the enclosure there are positioned near the open top a plurality of parallel - arranged flurescent tubes adapted to be energized with pulsating d.c. to produce a flow of ions in the tubes which flow from one end of the tube to the other. The tubes are excited in parallel so that the ion flow is always in the same direction. The enclosure is provided with means for easily attaching and detaching the chamber to the underside structure of the aircraft at a location immediately beneath and close to the transmitting and receiving antennas of the radome.
REFERENCES:
patent: 2159937 (1939-05-01), Zworykin
patent: 2886811 (1959-05-01), Harrison, Jr.
patent: 3024460 (1962-03-01), Dahl et al.
patent: 3090955 (1963-05-01), Hubka et al.
patent: 3225295 (1965-12-01), Altman et al.
patent: 3622680 (1971-11-01), Palmieri
Fairbanks Everitt E.
Hutzelman Robert W.
Beers R.
Hubler Malcolm F.
Scheinbein S.
Sciascia R.
The United States of America as represented by the Secretary of
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