Conical sweep array antenna and a radar having such an antenna

Details Conical sweep array antenna and a radar having such an antenna Conical sweep array antenna and a radar having such an antenna

1986-10-14

1989-08-15

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

342425, H01Q 326

Patent

active

048579360

ABSTRACT:
A conical sweep array antenna has a flat antenna structure having a plurality of microstrip sources disposed in a plurality of sections. Preferably, each section includes a plurality of sources. The flat antenna also has at least one source disposed outside any of the sections. A phase-shifting device phase-shifts the plurality of sources to cause a conical sweep pattern of the flat antenna. Also, the phase-shifter device provides a constant phase-shift to the one source which is not disposed in any section. The presence of the nonphase-shifted source improves the radiating diagram of the antenna of the invention, particularly by reducing the coma lobe.

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patent: 4633256 (1986-12-01), Chadwick

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