Title:
ANTENNA DEVICE AND MOBILE COMMUNICATION UNIT
Document Type and Number:
WIPO Patent Application WO/1999/048169
Kind Code:
A1
Abstract:
An antenna device used for a mobile communication unit such as a portable telephone operates satisfactorily on two or more frequency bands, can be adjusted to control its impedance characteristic, and can be manufactured with high yield. This antenna device comprises a first spiral antenna element (1) having one end open and the other end connected electrically with a high frequency circuit inside a communication terminal, and a second antenna element (2) having both ends open and arranged either outside or inside the first antenna element (1). The second antenna element (2) is electrically insulated from the first antenna, and its position is adjustable relative to the first antenna element to control the impedance characteristic of the antenna device.
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Inventors:
FUKUSHIMA SUSUMU (JP)
YUDA NAOKI (JP)
OOHARA MASAHIRO (JP)
YUDA NAOKI (JP)
OOHARA MASAHIRO (JP)
Application Number:
PCT/JP1999/001284
Publication Date:
September 23, 1999
Filing Date:
March 16, 1999
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
FUKUSHIMA SUSUMU (JP)
YUDA NAOKI (JP)
OHARA MASAHIRO (JP)
FUKUSHIMA SUSUMU (JP)
YUDA NAOKI (JP)
OHARA MASAHIRO (JP)
International Classes:
H01Q1/24; H01Q1/36; H01Q1/38; H01Q5/10; H01Q11/08; H01Q19/28; (IPC1-7): H01Q5/01; H01Q1/24; H01Q11/08
Foreign References:
| JPH05275919A | 1993-10-22 | |||
| JPH03236612A | 1991-10-22 | |||
| JPH09246828A | 1997-09-19 | |||
| JPH1032410A | 1998-02-03 | |||
| JPH1022730A | 1998-01-23 |
Other References:
See also references of EP 0984510A4
Attorney, Agent or Firm:
Iwahashi, Fumio (Ltd. 1006 Oaza Kadoma Kadoma-shi, Osaka, JP)
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