Methods and apparatus for reducing radio frequency...

Details Methods and apparatus for reducing radio frequency... Methods and apparatus for reducing radio frequency...

2007-03-30

2009-11-03

Dinh, Trinh V (Department: 2821)

Communications: radio wave antennas

Antennas

With electrical shield

C343S840000, C343S851000

Reexamination Certificate

active

07612731

ABSTRACT:
Methods and apparatus for a plate to prevent energy from a first antenna from interfering with a collocated second antenna. In one embodiment, the plate includes first and second conductive layers to shadow the second antenna and thereby block energy from reaching the second antenna. A resonant quarter wavelength spacing of the plates forces energy broadside minimizing the spillover the edge caused by diffraction. Multiple conductive layers having increasing radii can block diffracted energy from spilling over and around the plate. The multiple plates of increasing radii affect a waterfall-like spill wherein energy is lost in each level.

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PCT/US2007/008023 International Search Report dated Sep. 3, 2007.
RF Device and Antennas Branch, Link-16 Antenna, AS-4127A/URC-107(V), Feb. 2003, San Diego, California.

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