Radio device and electronic apparatus

Details Radio device and electronic apparatus Radio device and electronic apparatus

2006-06-26

2008-03-18

Nguyen, Hoang V. (Department: 2821)

Communications: radio wave antennas

Antennas

With radio cabinet

C343S7000MS

Reexamination Certificate

active

07345637

ABSTRACT:
The invention provides a radio device in which multi-resonance promotion and impedance adjustment can be readily performed and a restriction in a mounting space can be dissolved, and an electronic apparatus having the same installed therein. Provision of a stub (123) having a large area and serving as a frequency matching portion as well in a folded monopole antenna (120) results in that a conductor area can be increased, and a resonance frequency can be shifted to lower frequencies. In addition, a frequency of a radio communication antenna can be readily adjusted because the resonance frequency is adjusted by cutting the stub (123).

REFERENCES:
patent: 7136022 (2006-11-01), Sato et al.
Ohom Sha Ltd., “Antenna Engineering Handbook,” The Institute of Electronics, Info. and Comm. Engrs. Japan, Oct. 1996, pp. 112-113 and Figs. 4-1 and 4-3.
Satoh and Amano: “Two-Points Short-Circuited Folded Antenna Sharing Two Frequencies,” The 2004 IEICE General Conference B-1-57, Mar. 2004.

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