Electronic scanning antenna

Details Electronic scanning antenna Electronic scanning antenna

1976-11-10

1978-07-18

Smith, Alfred E.

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

343757, 343778, 343827, H01Q 326, H01Q 300, H01Q 1300, H01Q 2110

Patent

active

041019024

ABSTRACT:
There is described an electronic scanning antenna comprising a multiplicity of elementary radiators arranged for example in a vertical plane and constituting an array designed for simultaneous surveillance and tracking, the array being fed by two parallel waveguides. The first waveguide is connected to the radiators through a set of first couplers in cascade with a set of fixed phase shifters. The second waveguide is connected to the radiators through a set of second couplers in cascade with a set of variable phase shifters and with the first couplers and the fixed phase shifters. The waveguides are connected to respective transmitters and receivers operating at different frequencies. The complete assembly produces simultaneously at least one tracking beam which varies in elevation and one searching beam having a fixed, preferably low elevation angle.

REFERENCES:
patent: 3323127 (1967-05-01), Vogel
patent: 3990077 (1976-11-01), Beaulieu et al.
Blass, J., Multidirectional Antenna, A New Approach to Stacked Beams, IRE National Convention, 1960.
New Look in Radar, Electronics World, Feb., 1965.

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