Title:
MODULE SUBSTRATE WITH ANTENNA AND RADIO MODULE EMPLOYING IT
Document Type and Number:
WIPO Patent Application WO/2005/069441
Kind Code:
A1
Abstract:
A module substrate with an antenna the size of which is reduced furthermore while maintaining desired characteristics. The module substrate (100) with an antenna comprises a substrate body (110) and first and second symmetric radiation conductors (121, 122) provided on one side (111) of the substrate body (110). The first and second radiation conductors (121, 122) are each asymmetric with respect to a first line B passing the feeding point (121b) of the first radiation conductor and the feeding point (122b) of the second radiation conductor. As a result, the wavelength of the radio wave radiated by the current flowing in one side when viewed from the first line B is different from the wavelength of the radio wave radiated by the current flowing in the other side when viewed from the first line B. Therefore the size of the substrate body (110) is reduced, and a wide band can be ensured as compared with the prior art.
Inventors:
HARIHARA YASUMASA
Application Number:
PCT/JP2004/019586
Publication Date:
July 28, 2005
Filing Date:
December 28, 2004
Export Citation:
Assignee:
TDK CORP (JP)
HARIHARA YASUMASA
HARIHARA YASUMASA
International Classes:
G06K19/07; G06K19/077; H01Q1/38; H01Q9/28; H01Q19/10; (IPC1-7): H01Q9/28; G06K19/00; H01Q1/38
Foreign References:
| JP2002259934A | 2002-09-13 | |||
| JP2002011348A | 2002-01-15 | |||
| JP2002135037A | 2002-05-10 | |||
| JP2003309418A | 2003-10-31 | |||
| JP2002290131A | 2002-10-04 | |||
| JPH11251509A | 1999-09-17 | |||
| JPH0983239A | 1997-03-28 | |||
| JP2001251117A | 2001-09-14 |
Attorney, Agent or Firm:
Washizu, Mitsuhiro (5-1 Ginza 1-Chome, Chuo-k, Tokyo 61, JP)
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