Broadband circularly polarized patch antenna and method
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorDavid A Tonn
Life of this patent
Estimating the term…
Abstract
An antenna for connection to a feed includes a substrate with a conductive ground plane. An emitter is positioned on the top face of the substrate, and the feed is connected to the emitter and ground plane. A spacer is positioned on the substrate above the emitter and one layer of high dielectric constant rods is positioned above the spacer. The rods are positioned in a single plane, coplanar with the emitter, and parallel to the dominant current distribution when the emitter is active. Further layers of spacers and rods can be positioned at a predetermined angle to the rods beneath. A kit is further provided for application of spacers and rods to preexisting antennas.
Claims20
An antenna for connection to a feed comprising:
- a substrate having a bottom face and a top face;
- a ground plane positioned on the bottom face of said substrate and connected to a first element of the feed;
- an emitter positioned on the top face of said substrate and connected to a second element of the feed for producing a circularly polarized electromagnetic signal having a dominant current distribution in said emitter;
- at least one spacer positioned on the top face of said substrate above said emitter;
- and
- at least one layer of high dielectric constant rods positioned on a top surface of said at least one spacer, said plurality of high dielectric constant rods being positioned in a single plane, parallel with each other, parallel with said emitter and oriented parallel to the dominant current distribution when the emitter is active.
A kit for application to a patch antenna comprising:
- at least one spacer positioned on the top face of said patch antenna;
- and
- at least one layer of high dielectric constant rods positioned on a top surface of said at least one spacer, said plurality of high dielectric constant rods being positioned in a single plane, parallel with each other, parallel with the patch antenna and oriented parallel to the dominant current distribution in the patch antenna when the patch antenna is active.
A method for improving a circularly polarized patch antenna comprising the steps of:
- providing a plurality of high dielectric constant rods;
- arranging said rods in a first plane parallel with the patch antenna at a predetermined distance above the patch antenna;
- and
- orienting said rods parallel to the dominant current distribution in the patch antenna when the patch antenna is active.
Dependencies are inferred from the claim text.