Stacked patch antennas using dielectric substrates with patterned cavities

• US 10,454,174 B2
• Filed: 05/10/2016
• Issued: 10/22/2019
• Est. Priority Date: 05/10/2016
• Status: Active Grant

• Current Assignee: Novatel Incorporated (Hexagon AB)
• Original Assignee: Novatel Incorporated (Hexagon AB)
• Inventors: Yang, Ning
• Primary Examiner(s): Munoz, Daniel
• Assistant Examiner(s): Holecek, Patrick R
• Application Number:
  US15/151,122
• Publication Number:
  US 20170331192A1
• Time in Patent Office: 1,260 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 one or more first perforated air filled cavities; and

wherein the second ceramic layer has one or more second perforated air filled cavities.

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 one or more first perforated air filled cavities is disposed against the second metal layer.

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

5. The antenna of claim 1 wherein the one or more first perforated air filled cavity comprise of a plurality of first perforated air cavities.

6. The antenna of claim 1 wherein the one or more second perforated air filled cavity comprise a plurality of second perforated 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 perforated air filled cavities; and

wherein the second ceramic layer has a plurality of second perforated 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 perforated air filled cavities are arranged substantially symmetrically on the first ceramic layer.

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