Patch antenna

• US 8,432,315 B2
• Filed: 06/25/2010
• Issued: 04/30/2013
• Est. Priority Date: 12/01/2009
• Status: Expired due to Fees

• Current Assignee: Ace Technology Corporation, Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• Original Assignee: Ace Technology Corporation, Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• Inventors: Chung, Tae Inn, Kim, Byoung-Nam, Yoo, Tae-Hwan, Park, Young-Hun
• Primary Examiner(s): LE, DON P
• Application Number:
  US12/823,340
• Publication Number:
  US 20110128186A1
• Time in Patent Office: 1,040 Days
• Field of Search: 343/767, 343/834, 343/700.MS, 343/711, 343/725, 343/729
• US Class Current: 343/700.MS
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 9/0428 radiating a circular polarised wave

Abstract

The present invention relates to a technology for forming a patch antenna generating both linearly and circularly polarized waves at the same time, so as to reduce a propagation loss during transmission/receiving operations between a circularly polarized antenna and a linearly polarized antenna.

Claims

1. A patch antenna comprising:

a first radiator generating a circularly polarized wave and includes a first slot therein;

a second radiator disposed below the first radiator at a given distance therefrom, the second radiator generating a linearly polarized wave; and

a reflecting plate disposed below the second radiator at a given distance therefrom,

wherein a second slot is adjacent to the first radiator.

2. The patch antenna of claim 1, further comprising a first FR4 substrate below the first radiator.

3. The patch antenna of claim 1, further comprising a second FR4 substrate below the second radiator.

4. The patch antenna of claim 1, wherein the first slot is X-shaped.

5. The patch antenna of claim 1, wherein the second slot is provided to a lateral face of the first reflector and to another face perpendicular to the lateral face.

6. The patch antenna of claim 1, wherein the second reflector is formed in a rectangular strip shape.

7. The patch antenna of claim 1, wherein the second slot is bar-shaped.

8. A patch antenna comprising a layered structure that includes:

a first radiator generating a circularly polarized wave including a first slot therein;

a second radiator disposed below the first radiator, the second radiator generating a linearly polarized wave; and

a reflecting plate disposed below the second radiator,

wherein the layered structure is connected by a via and a second slot is adjacent to the first radiator.

9. The patch antenna of claim 8, wherein the via is formed at the corner of the layered structure.

10. The patch antenna of claim 8, wherein two vias are formed in a diagonal direction.

11. The patch antenna of claim 8, wherein the second slot is bar-shaped.