Four-port patch antenna
First Claim
1. A patch antenna comprising:
- a patch made of an electrically conductive material;
a patch substrate coupled to the patch wherein the patch substrate is made of an electrically insulating material;
a ground plane coupled to the patch substrate wherein the ground plane is made of an electrically conductive material having at least four slots formed therein;
a feed substrate coupled to the ground plane wherein the feed substrate is made of an electrically insulating material; and
a hybrid network coupled to the feed substrate wherein the hybrid network comprises;
a right hand circularly polarized port;
a left hand circularly polarized port; and
two matched terminated ports coupled to the right hand circularly polarized port and the left hand circularly polarized port.
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Accused Products
Abstract
A patch antenna is disclosed having four ports for circular polarization that suppress the TM-02 mode, resulting in a radiation pattern that is symmetric. The axial ratio performance is consequently superior to that of two-port patch antennas. A four-port patch antenna includes a patch made of an electrically conductive material, a patch substrate coupled to the patch wherein the patch substrate is made of a dielectric material, a ground plane coupled to the patch substrate wherein the ground plane is made of an electrically conductive material having at least four slots formed therein, a feed substrate coupled to the ground plane wherein the feed substrate is made of a dielectric material, and a hybrid network coupled to the feed substrate that includes a right hand circularly polarized port, a left hand circularly polarized port, and two matched terminated ports.
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Citations
18 Claims
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1. A patch antenna comprising:
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a patch made of an electrically conductive material;
a patch substrate coupled to the patch wherein the patch substrate is made of an electrically insulating material;
a ground plane coupled to the patch substrate wherein the ground plane is made of an electrically conductive material having at least four slots formed therein;
a feed substrate coupled to the ground plane wherein the feed substrate is made of an electrically insulating material; and
a hybrid network coupled to the feed substrate wherein the hybrid network comprises;
a right hand circularly polarized port;
a left hand circularly polarized port; and
two matched terminated ports coupled to the right hand circularly polarized port and the left hand circularly polarized port. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A phased array antenna for a communications system comprising:
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a patch made of an electrically conductive material;
a patch substrate coupled to the patch wherein the patch substrate is made of a dielectric material;
a ground plane coupled to the patch substrate wherein the ground plane is made of an electrically conductive material in which at least four slots are formed;
a feed substrate coupled to the ground plane wherein the feed substrate is made of a dielectric material; and
a hybrid network coupled to the feed substrate wherein the hybrid network comprises;
a right hand circularly polarized port;
a left hand circularly polarized port; and
two matched terminated ports coupled to the right hand circularly polarized port and the left hand circularly polarized port. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A patch antenna comprising:
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a patch made of an electrically conductive material;
a patch substrate coupled to the patch wherein the patch substrate is made of an electrically insulating material;
a ground plane coupled to the patch substrate wherein the ground plane is made of an electrically conductive material;
at least four slots formed in the ground plane;
a feed substrate coupled to the ground plane wherein the feed substrate is made of an electrically insulating material; and
a hybrid network coupled to the feed substrate. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification