High efficiency printed circuit array of log-periodic dipole arrays
AssigneeHarris Corporation
InventorsWilliam D. Killen, Randy T. Pike
Life of this patent
Estimating the term…
Abstract
A printed circuit array of log periodic dipole arrays (LPDA) where each 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.
Claims21
An array of log periodic dipole array (LPDA) antennas, comprising:
- a dielectric circuit board substrate, said substrate having at least a first portion, said first portion providing 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;
- and
- a plurality of LPDAs disposed on said substrate, said LPDAs each including 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.
An array of log periodic dipole array (LPDA) antennas, 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;
- and
- a plurality of LPDAs disposed on said substrate, said LPDAs each including 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;
- wherein said first relative permeability is from about 4 to 116.
An array of log periodic dipole array (LPDA) antennas, 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;
- and
- a plurality of LPDAs disposed on said substrate, said LPDAs each including 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;
- wherein at least a portion of said feed line is disposed on a second portion of said substrate, said second portion providing at least one of a second relative permeability and a second relative permittivity different from said bulk portion of said substrate and said second relative permeability is from about 4 to 116.
An array of log periodic dipole array (LPPA) antennas, 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;
- and
- a plurality of LPDAs disposed on said substrate, said LPDAs each including 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;
- wherein said first relative permeability is approximately equal to the square root of said first relative permittivity.
Dependencies are inferred from the claim text.