Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1976-11-19
1977-10-11
Tubbesing, T.H.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 5W, G01S 960
Patent
active
040538869
ABSTRACT:
A coherent stepped dual-frequency, ocean-wave, spectrometer radar system for measuring the characteristics of ocean-surface gravity waves includes: a transmitter for transmitting in successive steps coherently related pairs of frequencies having different, small, and known frequency separations; a coherent receiver for receiving and separating the radar returns of the stepped pairs of frequencies, a frequency-shifter for offsetting the doppler spectrum of each radar return, a multiplier for multiplying together the two frequencies of each pair for each step to obtain a Bragg resonance condition for each step; and a plurality of stepped detectors each for detecting a different step of said multiplier output.
REFERENCES:
patent: 3719946 (1973-03-01), Sletten et al.
David E. Weissman; Two Frequency Radar Interferometry Applied to the Measment of Ocean Wave Height; IEEE Transactions on Antennas & Propagation, vol. AP-21, No. 5; Sept. 1973, pp. 649-656.
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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