Circularly-polarized patch antenna
AssigneeRosemount Aerospace Inc.
InventorDonald R. Singh
Life of this patent
Estimating the term…
Abstract
In one example, a patch antenna includes a conductive ground plane layer, a conductive circular patch layer, a dielectric layer, a grounding connection, and a RF feed. The conductive circular patch layer includes a plurality of voids. The dielectric layer is disposed between and contacts each of the ground plane layer and the circular patch layer. The grounding connection extends from the ground plane layer through the dielectric layer and contacts the circular patch layer at a grounding location of the circular patch layer. The RF feed extends through the ground plane layer and the dielectric layer and contacts the circular patch layer at a RF feed location of the circular patch layer. The RF feed location is offset from a central axis of the circular patch layer.
Claims12
A patch antenna comprising:
- a conductive ground plane layer;
- a conductive circular patch layer comprising a plurality of voids;
- a dielectric layer disposed between and contacting each of the ground plane layer and the circular patch layer;
- a grounding connection extending from the ground plane layer through the dielectric layer and contacting the circular patch layer at a grounding location of the circular patch layer;
- a RF feed extending through the ground plane layer and the dielectric layer and contacting the circular patch layer at an electrical feed location of the circular patch layer;
- and
- a tuning portion that extends along a portion of an outer periphery of the circular patch layer;
- wherein the electrical feed location is offset from a central axis of the circular patch layer;
- wherein the plurality of voids are disposed symmetrically about the grounding location;
- wherein a first axis extending through each of the plurality of voids and a second axis extending perpendicular to the first axis define four quadrants of the circular patch layer;
- wherein the tuning portion extends along an outer periphery of a first quadrant of the four quadrants;
- and
- wherein the RF feed location is disposed within a second quadrant of the four quadrants, the second quadrant opposite the second axis and adjacent the first quadrant.
An assembly comprising:
- an electronics module;
- a patch antenna comprising:
- a conductive ground plane layer;
- a conductive circular patch layer having a plurality of voids;
- a dielectric layer disposed between and contacting each of the ground plane layer and the circular patch layer;
- a grounding connection extending from the ground plane layer through the dielectric layer and contacting the circular patch layer at a grounding location of the circular patch layer;
- a RF feed extending through the ground plane layer and the dielectric layer and contacting the circular patch layer at a RF feed location of the circular patch layer, wherein the RF feed location is offset from a central axis of the circular patch layer;
- and
- a tuning portion that extends along a portion of an outer periphery of the circular patch antenna;
- wherein the plurality of voids are disposed symmetrically about the grounding location;
- wherein a first axis extending through each of the plurality of voids and a second axis extending perpendicular to the first axis define four quadrants of the circular patch layer;
- wherein the tuning portion extends along an outer periphery of a first quadrant of the four quadrants;
- and
- wherein the RF feed location is disposed within a second quadrant of the four quadrants, the second quadrant opposite the second axis and adjacent the first quadrant;
- and
- an electrical cable connecting the electronics module and the RF feed.
Dependencies are inferred from the claim text.