Title:
MULTI-RESONANCE ANTENNA AND ANTENNA FOR PORTABLE RADIO
Document Type and Number:
WIPO Patent Application WO/2003/107478
Kind Code:
A1
Abstract:
A small antenna operating at a plurality of frequency bands comprising a pattern of antennal elements (14) resonant at a plurality of frequency bands formed as a plurality of helical lines on the outer circumferential surface of an antenna bobbin (12). A parasitic conductor (11) is fitted in a containing hole made substantially along the central axis of the antenna bobbin (12). An antenna operating well at two frequency bands of 800 MHz and 1.4 GHz of PDC can thereby be obtained.
Inventors:
MAMURO AKIO (JP)
SEKI KOUICHI (JP)
SEKI KOUICHI (JP)
Application Number:
PCT/JP2003/006532
Publication Date:
December 24, 2003
Filing Date:
May 26, 2003
Export Citation:
Assignee:
NIPPON ANTENNA KK (JP)
MAMURO AKIO (JP)
SEKI KOUICHI (JP)
MAMURO AKIO (JP)
SEKI KOUICHI (JP)
International Classes:
H01Q19/26; H01Q1/10; H01Q1/24; H01Q1/36; H01Q1/38; H01Q5/10; H01Q5/378; H01Q5/40; H01Q11/08; H04M1/02; (IPC1-7): H01Q1/36; H01Q1/24; H01Q1/38; H01Q5/01
Foreign References:
| JPH10209736A | 1998-08-07 | |||
| JPH0637531A | 1994-02-10 | |||
| JPH11330825A | 1999-11-30 | |||
| JPH0969723A | 1997-03-11 |
Attorney, Agent or Firm:
Asami, Yasuo (Shinkawa-Ohara BLDG.6F 27-8, Shinkawa 1-chom, Chuo-ku Tokyo, JP)
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