US 5,859,616 A · Interleaved planar array antenna system providing angularly adjustable linear polarization

Abstract

An interleaved planar array antenna system providing angularly adjustable linearly polarized beams comprises an array of parallel rows of transmit dipole element pairs and an array of parallel rows of receive dipole element pairs, the two arrays being interleaved. Each of the dipole element pairs includes a first dipole element and a second dipole element adjacent and orthogonal to the first dipole element. All of the first dipole elements are parallel to each other and all of the second dipole elements are parallel to each other. All of the dipole elements are on the same surface and on another surface parallel to and spaced from the first surface there is an array of transmit feed line pairs and an array of receive feed line pairs, with the arrays being interleaved with each other. The transmit feed line pairs are proximity coupled to the transmit dipole element pairs and the receive feed line pairs are proximity coupled to the receive dipole element pairs. By controlling the relative amplitudes and phases of signals applied to the two feed lines within each feed line pair, the resultant angle of linear polarization of a composite signal from the respective dipole element pairs is adjustable.

Claims16

Dependent claims

An antenna system comprising:

a first dipole element on a first dielectric surface;
a second dipole element on said first surface, the second dipole element being adjacent and at an angle to the first dipole element;
a pair of feed lines on a second dielectric surface parallel to and spaced from said first surface, a first of said pair of feed lines being proximity coupled to said first dipole element and a second of said pair of feed lines being proximity coupled to said second dipole element;
and
control means for controlling the relative amplitudes and phases of signals applied to said first and second of said pair of feed lines so as to control the resultant angle of linear polarization of a composite signal from said first and second dipole elements.

2 more elements

An antenna system comprising:

a first planar dielectric substrate;
a plurality of dipole element pairs arranged in a linear array on a first surface of said first substrate, with each of said pairs including a first dipole element and a second dipole element adjacent and at an angle to said first dipole element, and wherein said first dipole elements are parallel to each other and said second dipole elements are parallel to each other;
a second planar dielectric substrate underlying and parallel to said first substrate on the side of said first substrate opposite said first surface;
and
a pair of feed lines on the surface of said second substrate which is adjacent said first substrate, a first of said pair of feed lines being proximity coupled to said first dipole elements of said plurality of dipole element pairs and a second of said pair of feed lines being proximity coupled to said second dipole elements of said plurality of dipole element pairs.

2 more elements

A planar printed circuit antenna system for use in a communications system wherein the antenna transmit and receive signals operate over at least one frequency band and are linearly polarized, the antenna system comprising:

a first planar dielectric substrate;
a plurality of transmit feed line pairs on a first surface of said first substrate and extending generally along a first plurality of parallel straight lines, said plurality of transmit feed line pairs having undulations so that each of said transmit feed lines includes a plurality of parallel evenly spaced straight segments each at an angle of forty-five degrees to said first plurality of straight lines, wherein the segments of a first of each of said transmit feed line pairs is orthogonal to and interleaved with the segments of the second of said each of said transmit feed line pairs, and wherein all of the segments of each of said transmit feed line pairs lie along a respective one of said first plurality of straight lines;
a plurality of receive feed line pairs on said first surface of said first substrate and extending generally along a second plurality of parallel straight lines interleaved with and parallel to said first plurality of straight lines, said plurality of receive feed line pairs having undulations so that each of said receive feed lines includes a plurality of parallel evenly spaced straight segments each at an angle of forty-five degrees to said second plurality of straight lines, wherein the segments of a first of each of said receive feed line pairs is orthogonal to and interleaved with the segments of the second of said each of said receive feed line pairs, and wherein all of the segments of each of said receive feed line pairs lie along a respective one of second plurality of straight lines;
a second planar dielectric substrate overlying and parallel to said first surface of said first substrate;
a plurality of transmit radiating elements on the surface of said second substrate which is opposite said first substrate, said transmit radiating elements comprising straight line segments each overlying and orthogonal to a respective one of said transmit feed line parallel evenly spaced segments;
and
a plurality of receive radiating elements on said second substrate opposite surface and comprising straight line segments each overlying and orthogonal to a respective one of said receive feed line parallel evenly spaced segments.

4 more elements

Dependencies are inferred from the claim text.

Interleaved planar array antenna system providing angularly adjustable linear polarization

Life of this patent

Interleaved planar array antenna system providing angularly adjustable linear polarization

Life of this patent

Abstract

Claims16