Electromagnetic detection apparatus

Details Electromagnetic detection apparatus Electromagnetic detection apparatus

1980-05-12

1981-12-08

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 16R, 343113R, G01S 348

Patent

active

043050743

ABSTRACT:
An electromagnetic detection apparatus for sensing an object, has a transter for radiating electromagnetic energy toward the object. The apparatus also has an array of at least three spaced receiving antennas and one parasitic antenna. The parasitic antenna is spaced from and mounted alongside the array. Also included is a phase detection circuit for measuring the phase difference between signals received by one of the receiving antennas with respect to the other two. This apparatus can sense phase difference and correlate it to the azimuthal position of the object.

REFERENCES:
patent: 3172075 (1965-03-01), Kay
patent: 3296578 (1967-01-01), Saxton et al.
patent: 3408649 (1968-10-01), Keller
patent: 3540054 (1970-11-01), Broderick
patent: 3924236 (1975-12-01), Earp et al.

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