Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Patent
1990-05-17
1992-01-28
Barron, Jr., Gilberto
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
342437, G01S 308
Patent
active
050847090
ABSTRACT:
This disclosure relates to multi-element antenna clusters or arrays for the reception and transmission of radio waves for direction-finding, navigation aid and emitter and/or receiver location purposes. In particular, it relates to arrangements of multiple antennas whereby the direction of propagation (arrival or departure) of a wavefront is determined from a combination of the amplitudes of phasor (or total individual antenna output) differences between pairs of antennas, said arrangements being along certain geometrical patterns, such as a circle, an ellipse, a polygon, an open straight line, etc., with at least one longest dimension measuring more than one wavelength of the incident or departing wave. Although described in terms of electromagnetic waves and hence antennas as receiving sensors or radiators, this invention is reality applies to any other form of propagating waveborne energy, such as acoustic, ultrasonic, seismic, etc.
REFERENCES:
patent: 3005198 (1961-10-01), O'Meara
patent: 3939477 (1976-02-01), Green et al.
patent: 4809012 (1989-02-01), Tong
"An Analysis of the Performance of Multi-Aerial Adcock Direction-Finding Systems" by Redgment et al., Journal of IEE, vol. 94, Part IIIA, pp. 751-761, 1947.
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