System and method for improving antenna pattern with a TE20...

Details System and method for improving antenna pattern with a TE20... System and method for improving antenna pattern with a TE20...

2005-07-05

2005-07-05

Wong, Don (Department: 2821)

Communications: radio wave antennas

Antennas

With electrical shield

C343S844000, C343S776000

Reexamination Certificate

active

06914577

ABSTRACT:
An isolation shield improves the F/B ratio for a directional antenna radiating a electromagnetic wave with a wavelength of λXMTwith a TE20mode waveguide. The system includes a directional antenna and a waveguide adapted for attachment to one side of the directional antenna. The waveguide defines a channel spanning and positioned adjacent to the side of the directional antenna. The channel has a width and depth that are functions of λXMT. The waveguide excites a null in the E-field within the channel. The null being adjacent to the edge of the directional antenna and thereby improving the F/B ratio of the directional antenna.

REFERENCES:
patent: 4749973 (1988-06-01), Kaneko et al.
patent: 4985708 (1991-01-01), Kelly
patent: 5767813 (1998-06-01), Verma et al.
patent: 6046702 (2000-04-01), Curtis et al.
patent: 6185354 (2001-02-01), Kronz et al.
patent: 6501439 (2002-12-01), Keilen

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