Antenna module

• US 20050231429A1
• Filed: 12/08/2004
• Published: 10/20/2005
• Est. Priority Date: 12/10/2003
• Status: Active Grant

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Noguchi, Toshiharu, Mizoguchi, Yoshitaka, Maruyama, Keisuke, Tokunaga, Hiromi, Fujimura, Munenori
• Granted Patent: US 7,199,759 B2
• Time in Patent Office: Days
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/362 for broadside radiating helical antennas
• CPC Class Codes: H01Q 11/08 Helical antennas
• CPC Class Codes: H01Q 7/08 Ferrite rod or like elongated core

Abstract

The invention is to provide such an antenna module making broadband of transmitting and receiving frequencies, while realizing miniaturization. The invention has a structure comprising a mounting body; a chip antenna having a substrate mounted on the mounting body and a substrate and a couple of terminal parts provided on the substrate; an feeding portion to which one of the terminal parts provided on the mounting body is connected; a open portion to which the other of the terminal parts provided on the mounting body is connected; and a capacitive conductor provided in opposition to the substrate, thereby to make use of a bottom area hidden when mounting the chip antenna so as to increase capacitive components for realizing broadband of the antenna module.

Claims

1. An antenna module comprising

a mounting body,

a chip antenna mounted on the mounting body and having a substrate and a couple of terminal parts provided on the substrate,

an feeding portion to which one of the terminal parts provided on the mounting body is connected,

a open portion to which the other of the terminal parts provided on the mounting body is connected, and

a capacitive conductor provided between the mounting body and the substrate.

2. The antenna module as set forth in claim 1, wherein the capacitive conductor is conducted to the open portion.

3. The antenna module as set forth in claim 1, wherein the open portion is connected with an additional conductor.

4. The antenna module as set forth in claim 1, wherein the capacitive conductor has a capacitive couple with a helical part.

5. The antenna module as set forth in claim 1, wherein the chip antenna is a chip antenna having the substrate, a couple of terminal parts mounted on the substrate, and the helical part provided on the substrate.

6. The antenna module as set forth in claim 5, wherein the helical part is formed by providing spiral grooves by trimming the substrate formed with a conductive film.

7. The antenna module as set forth in claim 5, wherein the helical part is formed by winding a conductive wire on the substrate.

8. The antenna module as set forth in claim 5, wherein a plurality of the helical parts are provided on the substrate.

9. The antenna module as set forth in claim 5, wherein the chip antenna is provided with a protective film for covering at least the helical part.

10. The antenna module as set forth in claim 1, wherein the chip antenna is a chip antenna having the substrate, the couple of terminal parts mounted on the substrate, and the conductive wire provided in the interior of the substrate.

11. The antenna module as set forth in claim 1, wherein the chip antenna has the substrate, the mounting body, the couple of terminal parts mounted on the substrate, and the helical conductor provided in the interior of the substrate.

12. The antenna module as set forth in claim 1, wherein the capacitive conductor is provided in opposition to the helical part.

13. The antenna module as set forth in claim 10, wherein the capacitive conductor is provided in opposition to the conductive wire provided in the interior of the substrate.

14. The antenna module as set forth in claim 11, wherein the capacitive conductor is provided in opposition to the helical conductor provided in the interior of the substrate.

19. An electronic instrument comprising

the antenna module set forth in claim 11,

a high frequency circuit for transmitting and receiving signals necessary to the antenna module,

a processing circuit connected to the high frequency circuit so as to process signals, and

a control circuit for controlling the processing circuit and the high frequency circuit.

20. The electronic instrument as set forth in claim 19, wherein said electronic instrument is a portable terminal or a notebook personal computer.

21. A selective diversity device comprising:

the plurality of antenna modules set forth in claim 11,

a selecting part for selecting signals received at said antenna modules,

a wave detecting part for detecting the received signals selected by the selecting part,

a power computation part for computing electric power of the signals detected by the wave detecting part, and

a demodulator for data-demodulating the detected signals,

wherein the selecting part selects the received signals in response to the computed results by the power computation part.

22. A composite diversity device comprising:

the plurality of antenna modules set forth in claim 11,

a composite part for composing signals received at said antenna modules,

a wave detecting part for detecting the received signals selected by the selecting part,

a power computation part for computing electric power of the signals detected by the wave detecting part, and

a demodulator for data-demodulating the detected signals,

wherein the composite part composes the received signals in response to the computed results by the power computation part.

23. The composite diversity as set forth in claim 21, wherein the composite of the received signal at the composite part is a maximum ratio.

15. An antenna module comprising:

a mounting body;

a plurality of conductors provided on the mounting body, and

a plurality of chip antennas having a substrate and a couple of terminal parts mounted on the substrate,

wherein the chip antennas are in series connected at terminal parts between the conductors, one of the conductors being outermost both ends of said plural and connected antennas is an feeding portion, while the other is a open portion, and one parts of said plural conductors are disposed in opposition to said substrate.

17. The antenna module as set forth in claim 15, wherein the chip antenna is a chip antenna having the substrate, the couple of terminal parts mounted on the substrate, and the helical part provided on the substrate, and the capacitive conductor is disposed in opposition to the helical part.

18. The antenna module as set forth in claim 15, wherein the capacitive conductor is conducted to the open portion.

16. An antenna module comprising:

a mounting body,

a plurality of chip antennas mounted on the mounting body and having the substrate and the a couple of terminals provided on the substrate

conductors connecting alternately in series said plurality of chip antennas,

an feeding portion connected with one of terminal parts to which said conductor provided to the mounting body is not connected,

a open portion connected with the other of terminal parts to which said conductor provided to the mounting body is not connected, and

a capacitive conductor provided in opposition to the substrate provided on the mounting body.

24. A structure of mounting chip antenna comprising:

a mounting body, and

a chip antenna having a substrate and a couple of terminal parts provided on the substrate,

wherein one of the terminal parts is connected to an feeding portion provided on the mounting body, and the other of the terminal parts is connected to a release provided on the mounting body, and a capacitive conductor provided on the mounting body is in opposition to the substrate.

25. The structure of mounting chip antenna as set forth in claim 24, wherein the capacitive conductor is conducted to the open portion.

26. The structure of mounting chip antenna as set forth in claim 24, wherein the chip antenna is a chip antenna having the substrate, the couple of terminal parts mounted on the substrate, and a helical part provided on the substrate, and the capacitive conductor is in opposition to the helical part.