Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Patent
1983-11-14
1986-12-30
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
364829, 364726, 364516, 324 77B, 342378, 342196, G01S 504, G01S 316, G06G 719
Patent
active
046332570
ABSTRACT:
A system for indicating the direction of a source of radio waves received by a circular antenna array (12) includes a Butler matrix (18) that receives the array outputs and feeds the resultant matrix outputs to correction circuits (22) whose transfer functions are the inverses of the direction-independent factors of antenna patterns generated by antenna elements driven at relative phases that advance around the array at rates that complete an integral number of cycles in one circuit of the array. The resultant corrected signals are fed to a compressive receiver (26), which accordingly generates an output on an output port whose position indicates the direction of the source of the signal.
Apostolos John T.
Boland Robert P.
Stromswold Chester E.
Blum Theodore M.
Etlinger Louis
Issing Gregory C.
Sanders Associates Inc.
Weinstein Stanton D.
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