Digital bearing indicator

Details Digital bearing indicator Digital bearing indicator

1982-01-22

1984-12-18

Blum, Theodore M.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

H04B 700

Patent

active

RE0317721

ABSTRACT:
Apparatus for digitally indicating the bearing angle of a source of microwave energy includes an antenna array of a plurality of antenna elements equispaced about an arc of a circle in a plane. Connected to each of the antenna elements is a different input port of a microwave power dividing and phase transforming hybrid matrix. Some of the output ports of the matrix are connected to input ports of a plurality of digital phase discriminators whose outputs emit a coded combination of binary level signals. The outputs of the phase discriminators are connected to an ambiguity resolving means which transform the binary level signals to an unambiguous digital word representing the bearing angle.

REFERENCES:
patent: 3474446 (1969-10-01), Shestag et al.
patent: 3935575 (1976-01-01), Leisterer et al.
patent: 3946395 (1976-03-01), Kirchhoff
patent: 4103304 (1978-07-01), Burnham et al.
Interferometric Receive Techniques, Anaren Microwave Inc., Syracuse, NY, Jan. 1971, pp. 1-56.
1974 International IEEE/AP-S Symposium, Jun. 10, 1974, Lewis et al., A Broadband Stripline Array Element, pp. 335-337.
IEEE International Convention Record, vol. 14, No. 5, W. Waltman et al., A Broadband Interferometer, pp. 156-166.
IEEE Transactions on Antennas and Propagation, vol. AP-21, No. 2, Mar. 1973, B. Sheleg, Butler Submatrix Feed Systems for Antenna Arrays, pp. 228 & 229.

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