Antenna unit and portable radio system comprising antenna unit

Details Antenna unit and portable radio system comprising antenna unit Antenna unit and portable radio system comprising antenna unit

2006-10-24

2006-10-24

Le, Hoanganh (Department: 2821)

Communications: radio wave antennas

Antennas

With radio cabinet

C343S895000

Reexamination Certificate

active

07126545

ABSTRACT:
A subject of the present invention is to provide an antenna unit and a portable radio device capable of attaining a wider bandwidth and a lower SAR.In the present invention, an antenna element (12) that has an effective length corresponding to a half wavelength of a transmitting frequency and a parasitic element (13) that has an effective length corresponding to a half wavelength of a receiving frequency are provided, an antenna current is induced in the antenna element (12) at the transmitting frequency upon transmitting a radio wave in a predetermined transmitting frequency band, and another antenna current is induced in the parasitic element (13) by a spatial coupling between the antenna element (12) and the parasitic element (13) at the receiving frequency upon receiving the radio wave in a predetermined receiving frequency band, whereby peak points in an antenna current distribution are scattered into two points. Accordingly, a wider bandwidth can be obtained without addition of a matching circuit and also expansion of a parts packaging space on a board and reduction in the number of packaged parts can be achieved.

REFERENCES:
patent: 5666125 (1997-09-01), Luxon et al.
patent: 6025811 (2000-02-01), Canora et al.
patent: 6046703 (2000-04-01), Wang et al.
patent: 6515634 (2003-02-01), Desclos et al.
patent: 6765536 (2004-07-01), Phillips et al.
patent: 6781556 (2004-08-01), Kojima et al.
patent: 0 590 671 (1994-04-01), None
patent: 1 154 513 (2001-11-01), None
patent: 62-234404 (1987-10-01), None
patent: 10-51223 (1998-02-01), None
patent: 2001-85920 (2001-03-01), None
patent: 2001-313516 (2001-11-01), None
patent: 2001-339215 (2001-12-01), None
Roger Yew-Siow Tay et al., “Dipole Configurations with Strongly Improved Radiation Efficiency for Hand-Held Transceivers”, Jun. 1998, pp. 798-806.

Affiliated with

Also associated with

Rating

Antenna unit and portable radio system comprising antenna unit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Antenna unit and portable radio system comprising antenna unit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Antenna unit and portable radio system comprising antenna unit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3634205