Communications: radio wave antennas – Antennas – With radio cabinet
Patent
1998-05-06
2000-08-01
Wong, Don
Communications: radio wave antennas
Antennas
With radio cabinet
343895, H01Q 136
Patent
active
060973412
ABSTRACT:
An antenna structure for a portable radio communication apparatus of the present invention includes a whip antenna and a helical antenna feed portion connected by capacitive coupling via an insulator. When the whip antenna is extended, the electric length can be adjusted on the basis of the amount of capacitive coupling between a straight portion and the helical antenna feed portion, i.e., without resorting to the adjustment of a helical antenna element. When the whip antenna is retracted, the straight portion is electrically isolated in order to allow the helical antenna element to operate alone. In this position, the helical antenna element is optimally adjusted in order to resonate in a desired frequency band.
REFERENCES:
patent: 5343213 (1994-08-01), Kottke et al.
patent: 5504494 (1996-04-01), Chatzipetros et al.
patent: 5764191 (1998-06-01), Tsuda
patent: 5835065 (1998-11-01), Wallace et al.
patent: 5861859 (1999-01-01), Kanayama et al.
Japanese Patent Application No. 7-122917, published May 12, 195. (It is noted in the Search Report that U.S. Patent No. 5,691,730 is an equivalent).
Clinger James
NEC Corporation
Wong Don
LandOfFree
Structure of an antenna for a portable radio communication appar does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Structure of an antenna for a portable radio communication appar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structure of an antenna for a portable radio communication appar will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-668359