Microstrip antenna
First Claim
Patent Images
1. A microstrip antenna for radiating or detecting electromagnetic signals having a wavelength λ
- o comprising;
a dielectric sheet of relative dielectric constant ε
r, relative permeability μ
r and uniform thickness t havinga. on a first broad surface1. at least three thin conductive resonant dipole radiator elements, each radiator element having two orthogonal coordinates that respectively define E and H planes of electromagnetic radiation for said radiator element, with the E plane coordinate dimension of each radiator element being approximately one-half the dielectric wavelength λ
o/√
ε
r μ
r ;
2. said radiator elements conductively joined by thin conductive strips into an array or arrays of at least two radiator elements; and
3. a terminal for connecting each array to a transmission line,b. on the other broad surface an essentially continuous thin conductive ground element more than coextensive with the radiator elements which defines a radiation aperture;
wherein the improvement comprises;
a. said conductive strips comprise one or more bridge elements, each bridge element having a length providing approximately a phase reversal from end to end at the operating wavelength λ
o, each bridge element conductively joining two adjacent radiator elements in the same array at edges of approximately opposite phase, the width of each bridge element being less than the H coordinate dimension of one of the radiator elements it joins and less than one-half the H coordinate dimension of the other radiator element it joins, and in each array a bridge element is conductively joined to the periphery of a radiator element at a location that is opposite in phase to a location on said radiator element where said terminal or another bridge element is connected; and
b. said terminal for connecting each array to a transmission line is located on a radiator element off the element'"'"'s H coordinate.
0 Assignments
0 Petitions
Accused Products
Abstract
Microstrip antenna having one or more arrays of resonant dipole radiator elements. The radiator elements have an E coordinate dimension of approximately λo/2√ εr μr. Bridge elements directly and conductively join adjacent pairs of radiator elements to provide energy distribution and the desired phase relationship. The radiator elements and bridge elements are in a broad surface which is uniformly spaced from a ground element by a dielectric sheet.
-
Citations
28 Claims
-
1. A microstrip antenna for radiating or detecting electromagnetic signals having a wavelength λ
- o comprising;
a dielectric sheet of relative dielectric constant ε
r, relative permeability μ
r and uniform thickness t havinga. on a first broad surface 1. at least three thin conductive resonant dipole radiator elements, each radiator element having two orthogonal coordinates that respectively define E and H planes of electromagnetic radiation for said radiator element, with the E plane coordinate dimension of each radiator element being approximately one-half the dielectric wavelength λ
o/√
ε
r μ
r ;2. said radiator elements conductively joined by thin conductive strips into an array or arrays of at least two radiator elements; and 3. a terminal for connecting each array to a transmission line, b. on the other broad surface an essentially continuous thin conductive ground element more than coextensive with the radiator elements which defines a radiation aperture; wherein the improvement comprises; a. said conductive strips comprise one or more bridge elements, each bridge element having a length providing approximately a phase reversal from end to end at the operating wavelength λ
o, each bridge element conductively joining two adjacent radiator elements in the same array at edges of approximately opposite phase, the width of each bridge element being less than the H coordinate dimension of one of the radiator elements it joins and less than one-half the H coordinate dimension of the other radiator element it joins, and in each array a bridge element is conductively joined to the periphery of a radiator element at a location that is opposite in phase to a location on said radiator element where said terminal or another bridge element is connected; andb. said terminal for connecting each array to a transmission line is located on a radiator element off the element'"'"'s H coordinate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
- o comprising;
Specification