ANTENNA

• US 20120105302A1
• Filed: 01/05/2012
• Published: 05/03/2012
• Est. Priority Date: 07/09/2009
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: KATO, Noboru, SASAKI, Jun, MIURA, Teppei
• Granted Patent: US 9,595,761 B2
• Time in Patent Office: Days
• US Class Current: 343/905
• CPC Class Codes: H01Q 13/08 Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
• CPC Class Codes: H01Q 13/10 Resonant slot antennas
• CPC Class Codes: H01Q 9/0421 with a shorting wall or a shorting pin at one end of the element H01Q9/0414 takes precedence

Abstract

This disclosure provides an antenna having a high degree of design flexibility. In a representative embodiment, the antenna includes a ground conductor to which a ground potential is applied, a linear conductor that transmits a high-frequency signal, an insulating layer configured to isolate the ground conductor and the linear conductor from each other, and a radiation conductor that is connected between the linear conductor and the ground conductor. The radiation conductor has a line width larger than that of the linear conductor between a point of connection to the linear conductor and a point of connection to the ground conductor, and is configured to emit an electric field.

Claims

1. An antenna comprising:

a ground conductor to which a ground potential is applied;

a linear conductor configured to transmit a high-frequency signal;

an insulating layer configured to isolate the ground conductor and the linear conductor from each other; and

a radiation conductor that is connected between the linear conductor and the ground conductor, said radiation conductor having a line width larger than that of the linear conductor between a point of connection to the linear conductor and a point of connection to the ground conductor, and is configured to emit an electric field.

2. The antenna according to claim 1,

wherein the linear conductor and the radiation conductor face the ground conductor via the insulating layer, and

wherein a distance between the radiation conductor and the ground conductor is larger than that between the linear conductor and the ground conductor.

3. The antenna according to claim 2, wherein a number of the insulating layers between the ground conductor and the radiation conductor is larger than that between the ground conductor and the linear conductor.

4. The antenna according to claim 1, wherein the ground conductor is disposed so that the ground conductor does not overlap the radiation conductor in plan view from a normal direction with respect to a main surface of the radiation conductor.

5. The antenna according to claim 1, wherein a reactance of the radiation conductor is larger than that of the linear conductor.

6. The antenna according to claim 2, wherein a reactance of the radiation conductor is larger than that of the linear conductor.

7. The antenna according to claim 3, wherein a reactance of the radiation conductor is larger than that of the linear conductor.

8. The antenna according to claim 4, wherein a reactance of the radiation conductor is larger than that of the linear conductor.

9. The antenna according to claim 1, further comprising:

a first terminal connected to the linear conductor; and

a second terminal connected to the ground conductor.

10. The antenna according to claim 1, wherein the ground conductor and the linear conductor form a microstrip line structure.

11. The antenna according to claim 2, wherein the ground conductor and the linear conductor form a microstrip line structure.

12. The antenna according to claim 3, wherein the ground conductor and the linear conductor form a microstrip line structure.

13. The antenna according to claim 4, wherein the ground conductor and the linear conductor form a microstrip line structure.

14. The antenna according to claim 5, wherein the ground conductor and the linear conductor form a microstrip line structure.

15. The antenna according to claim 1, wherein an area of the radiation conductor is larger than that of the linear conductor.

16. The antenna according to claim 2, wherein an area of the radiation conductor is larger than that of the linear conductor.

17. The antenna according to claim 4, wherein an area of the radiation conductor is larger than that of the linear conductor.

18. The antenna according to claim 1, wherein a plurality of the linear conductors are connected in parallel.

19. The antenna according to claim 2, wherein a plurality of the linear conductors are connected in parallel.

20. The antenna according to claim 4, wherein a plurality of the linear conductors are connected in parallel.