Title: Interferometer radar elevation angle measurement apparatus

Abstract: In the measurement of the phase difference (proportional to the elevation angle of a target) provided by the radar target signals that are received by each antenna of an antenna array, a comparison of the responses of the signal processing circuitry to the radar target signals and to two signals with an adjustable known phase difference, causes the known phase difference to change until the result of the comparison is a null. The known phase difference, at the time that the comparison provides a null, is equal to the phase difference provided by the radar target signals and is independent of phase errors introduced by the processing circuitry.

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Inventors: Danzer, Paul M. (Norwalk, CT, US)
Rae, Giles E. (Ridgefield, CT, US)

Application Number: 166754
Filing Date: 1971-07-28
Publication_date: 1976-03-02
Assignee: United Technologies Corporation (Hartford, CT)
Primary Class(es): 342/156 342/102, 342/442
Other Classes:
US Patent Ref:

3181160	Apr, 1965	Pichafroy	343/16.
3309701	Mar, 1967	Bollinger et al.	343/16.
3394374	Jul, 1968	Weiss	343/100.
3438044	Apr, 1969	Elia et al.	343/16.

Other Refs:
Primary Examiner: Borchelt, Benjamin A.
Assistant Examiner: Montone, G. E.
Attorney: Williams; M. P.