Gec-marconi Electronic Systems Corp.

Gec-marconi Hazeltine Corporation

Lawrence S Gans

Leonard Schwartz

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.

Interleaved planar array antenna system providing angularly adjustable

An interleaved planar array antenna system providing opposite circular polarizations comprises an array of parallel rows of parallel spaced transmit dipole radiating elements and an array of parallel rows of parallel spaced receive dipole radiating elements. Both sets of dipole elements are on the same surface, with the receive dipole elements being oriented orthogonal to the transmit dipole elements and the rows of transmit and receive elements being interleaved. On another surface parallel to and spaced from the first surface, there is at least one transmit feed line which is proximity coupled to the transmit dipole elements and at least one receive feed line which is proximity coupled to the receive dipole elements. Polarizing means are spaced from and overly the transmit and receive dipole elements for transforming orthogonally oriented linearly polarized transmit and receive beams into oppositely circularly polarized transmit and receive beams.

Interleaved planar array antenna system providing opposite circular

A full aperture interleaved space duplexed beamshaped microstrip antenna system wherein the separate transmit and receive microstrip antennas each has respective arrays of radiating patch elements. Each of the antennas is fed from a single end thereof so that each antenna creates four beams. Beam pitch angles are introduced into each antenna so as to reduce the coupling between adjacent lines to allow the gap within each connected line pair to be reduced. This gap reduction provides room for the antennas to be interleaved within a common rectangular aperture so that the separate feeds are at opposite ends of the aperture. Each antenna then utilizes the entire aperture. Isolation elements are provided between the lines of the transmit and receive antennas so as to reduce the mutual coupling therebetween and maintain the minimum required sixty dB isolation.

Full aperture interleaved space duplexed beamshaped microstrip antenna

A space duplexed beamshaped microstrip antenna system including transmit and receive antennas, each of which has two groups of interleaved arrays. The array groups are slanted in opposite directions and each is fed from opposite corners of the antenna so that each group utilizes its entire assigned reduced width aperture to create the required beam contours for two beams. To achieve frequency and temperature compensation, one of the antennas is made up of forward firing arrays and the other of the antennas is made up of backward firing arrays.

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Sparta, NJ, United States of America

Lawrence S Gans