High efficiency printed circuit LPDA
AssigneeHarris Corporation
InventorsWilliam D. Killen, Randy T. Pike
Life of this patent
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Abstract
A printed circuit log periodic dipole array (LPDA) includes dipole elements with arms having reduced size through use of high effective permittivity substrate portions. The radiation efficiency degradation generally associated with use of a high permittivitty substrate can be be reduced through addition of magnetic particles to provide enhanced permeability in the high permittivity regions. The substrate preferably includes meta-materials. The feed line can provide a broadband transformation by being configured as a plurality of segments having quarter wave electrical lengths.
Claims18
A log periodic dipole array (LPDA) antenna, comprising:
- a dielectric circuit board substrate, said substrate having at least a first portion, said first portion providing at least one of a first relative permeability and a first relative permittivity, said first relative permeability and said first relative permittivity being different from a bulk portion of said substrate;
- at least one feed line and a plurality of dipole elements electrically connected to said feed line, at least a portion of said dipole elements disposed on said first portion.
Dependencies are inferred from the claim text.