Choke-slot ground plane and antenna system

Details Choke-slot ground plane and antenna system Choke-slot ground plane and antenna system

1991-08-26

1992-07-21

Lee, John D.

Communications: radio wave antennas

Antennas

With grounding structure

343829, 343DIG2, H01Q 148

Patent

active

051326981

ABSTRACT:
A choke-slot ground plane and antenna system 30 is disclosed. In one embodiment the choke-slot ground plane and antenna system 30 includes a monopole antenna 44, a ground plate 36 having a plurality of concentric annular grooves 38a-c. Other embodiments include a ground plane 36 having varying size grooves to 38a-l, a ground plane having grooves having filled with dielectric material 38a'-c', a ground plate having a broadened bandwidth and having a series of first and second-type grooves 34a-c and 38a"-c", and a ground plate having a frusto-conical shape 36a and 36b.

REFERENCES:
patent: 4700197 (1987-10-01), Milne
patent: 4788550 (1988-11-01), Chadima
patent: 4851859 (1989-07-01), Rappaport
patent: 4864320 (1989-09-01), Munson et al.
R. E. Lawrie et al., "Modifications of Horn Antennas for Low Sidelobe Levels," IEEE Trans. Antennas Propagat., vol. AP-14, pp. 605-610, Sep. 1966.

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