STACKED PATCH ANTENNAS USING DIELECTRIC SUBSTRATES WITH PATTERNED CAVITIES

• US 20170331192A1
• Filed: 05/10/2016
• Published: 11/16/2017
• Est. Priority Date: 05/10/2016
• Status: Active Grant

• Current Assignee: Novatel Incorporated (Hexagon AB)
• Original Assignee: Novatel Incorporated (Hexagon AB)
• Inventors: Yang, Ning
• Granted Patent: US 10,454,174 B2
• Time in Patent Office: Days
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 9/04 Resonant antennas
• CPC Class Codes: H01Q 9/0414 in a stacked or folded configuration

Abstract

A GNSS RHCP stacked patch antenna with wide dual band, high efficiency and small size is made of a molded high-permittivity material, such as ceramics, with a patterned cavity in the dielectric substrate. The perforated cavities in the substrate reduce the effective dielectric constant, increase the bandwidth and efficiency. The high-order modes can be manipulated through the design of cavities.

Claims

1. An antenna comprising:

a first metal layer disposed on a first surface of a first ceramic layer;

a second metal layer disposed between a second surface of the first ceramic layer and a first surface of a second ceramic layer;

wherein the first ceramic layer has a first air filled cavity; and

wherein the second ceramic layer has a second air filled cavity.

2. The antenna of claim 1 further comprising one or more through holes extending from the first metal layer, through the first ceramic layer, the second metal layer and the second ceramic layer to enable radio frequency signals to pass to the first metal layer.

3. The antenna of claim 1 wherein the first air filled cavity is disposed against the second metal layer.

4. The antenna of claim 1 wherein the second air filled cavity is disposed on a second surface of the second ceramic layer.

5. The antenna of claim 1 wherein the first air filled cavity comprises of a plurality of first air cavities.

6. The antenna of claim 1 wherein the second air filled cavity comprises a plurality of second air filled cavities.

7. An antenna comprising:

a first metal layer disposed on a first surface of a first ceramic layer;

a second metal layer disposed between a second surface of the first ceramic layer and a first surface of a second ceramic layer;

wherein the first ceramic layer has a plurality of first air filled cavities; and

wherein the second ceramic layer has a plurality of second air filled cavities.

8. The antenna of claim 7 further comprising one or more through holes extending from the first metal layer, through the first ceramic layer, the second metal layer and the second ceramic layer to enable radio frequency signals to pass to the first metal layer.

9. The antenna of claim 7 wherein the plurality of first air filled cavities are arranged substantially symmetrically on the first ceramic layer.

10. The antenna of claim 7 wherein the plurality of second air filled cavities are arranged substantially symmetrically on the second ceramic layer.