Reduced weight artificial dielectric antennas and method for pro

Details Reduced weight artificial dielectric antennas and method for pro Reduced weight artificial dielectric antennas and method for pro

1998-11-03

2000-06-13

Wong, Don

Communications: radio wave antennas

Antennas

Microstrip

343895, H01Q 136

Patent

active

060754850

ABSTRACT:
An artificial anisotropic dielectric material is used as a microstrip patch antenna substrate and can achieve dramatic antenna weight reduction. The artificial dielectric is comprised of a periodic structure of low and high permittivity layers. The net effective dielectric constant in the plane parallel to the layers is engineered to be any desired value between the permittivities of the constituent layers. These layers are oriented vertically below the patch to support electric fields consistent with desired resonant modes. Substrates may be engineered for both linearly and circularly polarized patch antennas. Substrate weights can be reduced by factors of from 6 to 30 times using different types of high permittivity layers. This concept has numerous applications in electrically small and lightweight antenna elements, as well as in resonators, microwave lenses, and other electromagnetic devices.

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