Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Patent
1987-10-08
1990-04-24
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
342451, 342405, 342374, 455283, G01S 504, H04B 110
Patent
active
049203487
ABSTRACT:
The disclosure relates to methods and apparatus for separating radio signals arriving from different directions and for multiplexing signals intended for receivers dispersed in different directions. The methods and apparatus employ a plurality of antennas with spacing and individual feedline characteristics designed so that a modulation is imparted to each of a plurality of incident signals, for receiving antennas, and radiated signals for transmitting antennas, the modulation level of each signal being determined by the direction of propagation of the signal and by the spacing between antenna pairs. Accordingly, the orientation of lines connecting pairs of antennas as well as the spacing between antennas are set to inhibit the modulation in a particular direction, or to strip a particular modulation off a signal incident from a selected direction.
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The Bell System Techinical Journal, vol. XLVI, No. 7, Sep. 1967, "Some Properties and Limitations of Electronically Steerable Phased Array Antennas*" by D. Varon and G. I. Zysman, pp. 163-168.
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Cain David
Tarcza Thomas H.
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