Communications – electrical: acoustic wave systems and devices – Distance or direction finding – By combining or comparing signals
Patent
1978-06-09
1980-04-15
Wilbur, Maynard R.
Communications, electrical: acoustic wave systems and devices
Distance or direction finding
By combining or comparing signals
343119, G01S 380
Patent
active
041987055
ABSTRACT:
A fixed array of three identical directional receivers, each having a carid directional pattern, are arranged in a symmetrical configuration with each receiver having its principal axis of maximum sensitivity oriented 120.degree. from the corresponding axes of its neighbors. By comparing the relative magnitudes of the voltages generated in each of the three cardioid receivers upon receiving a signal, the bearing of the signal source is automatically determined and displayed. The tri-cardioid receiving array overcomes the prior art need for large-sized directional receiving transducers, and also overcomes the need for mechanically rotating or electronically scanning the receiving array to find the bearing of the signal source.
REFERENCES:
patent: 2457199 (1948-12-01), Best
patent: 2994081 (1961-07-01), Jordan et al.
patent: 4114157 (1978-09-01), Samukawa
Berger Richard E.
The Stoneleigh Trust, Donald P. Massa and Fred M. Dellorfano, Tr
Wilbur Maynard R.
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