Assembly of main and auxiliary electronic scanning antennas and radar incorporating such an assembly
AssigneeThomson-CSF
InventorsSerge Drabowitch, Guy Leterrier
Life of this patent
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Abstract
The invention relates to an assembly of main and auxiliary antennas for an electronic scanning radar. Each auxiliary antenna uses all or part of the elementary radiation sources of the main antenna. The energy received by each of them is sampled by a coupler and then phase shifted by an angle .phi.i in an adjustable phase shift circuit. The respective outputs of the phase shift circuits are concentrated within a waveguide. The auxiliary antennas are of the same type as the main antenna. The invention is applicable to radars equipped with an anti-jamming device.
Claims10
An antenna for an electronic scanning radar having a main beam and at least one auxiliary beam, comprising:
- radiation source means for producing a group of outputs;
- first adjustable phase shift means, connected to said source means, for focussing said outputs in accordance with a single polarization so as to form a main channel corresponding to said main beam;
- first waveguide means, connected to said first phase shift means, for collecting said main channel and providing a main beam output;
- directional coupler means, connected between said source means and said first phase shift means, for sampling part of said outputs and producing a sampled output;
- second adjustable phase shift means, connected to said coupler means, for focussing said sampled outputs in accordance with said single polarization so as to form at least one auxiliary channel corresponding to said at least one auxiliary beam;
- and
- second waveguide means, connected to said second phase shift means, for collecting said auxiliary channel and providing auxiliary beam outputs.
Dependencies are inferred from the claim text.