Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1976-11-19
1977-10-18
Tubbesing, T.H.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
G01S 902
Patent
active
040548791
ABSTRACT:
A coherent, dual-frequency, ocean wave spectrometer radar system for measuring the characteristics of ocean surface gravity waves includes: a transmitter for transmitting a pair of closely spaced, coherently related, microwave frequencies; a receiver for receiving and separating the radar-return signals of the dual-frequency channels; a frequency shifter for offsetting the doppler spectrum of each radar return signal; and a multiplier for multiplying the radar-return signals of the dual-frequency channels to obtain a Bragg resonance condition indicating the presence of a particular gravity wave frequency on the ocean surface.
REFERENCES:
patent: 3719946 (1973-03-01), Sletten et al.
D. Ross et al.; Laser & Microwave Observations of Sea-Surface Condition, ; IEEE Transactions on Geoscience Electronics; Oct. 1970, vol. GE8, No. 4.
D. E. Weissman; Two Frequency Radar Interferometry applied to the Measurement, etc.; IEEE Transactions on Antenna & Propagation; Sept. 1973, vol. AP-21, No. 5.
Plant William J.
Schuler Dale L.
Wright John W.
Rasmussen David G.
Schneider Philip
Sciascia R. S.
The United States of America as represented by the Secretary of
Tubbesing T.H.
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