Small antennas such as microstrip patch antennas

Details Small antennas such as microstrip patch antennas Small antennas such as microstrip patch antennas

1997-01-22

1999-02-09

Wong, Don

Communications: radio wave antennas

Antennas

Microstrip

343873, H01Q 138

Patent

active

058700579

ABSTRACT:
In an antenna having a conductor of a length L and a dielectric material with a dielectric constant .epsilon..sub.r1 contacting the conductor, a matching dielectric layer .epsilon..sub.r2 less than .epsilon..sub.r1 matches the dielectric constant to free space. Preferably .epsilon..sub.r2 =.sqroot..epsilon..sub.r1 , L=.lambda..sub.o /(2.sqroot..epsilon..sub.r1 ). The depth d of the second dielectric is a quarter wavelength in the matching layer. Multiple matching layers with successively decreasing dielectric constants forms embodiments. In one embodiment the resonant conductive arrangement is a microstrip patch antenna with the dielectric material supporting a patch and matching layer covering the dielectric material.

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