Communications: radio wave antennas – Antennas – With radio cabinet
Patent
1996-09-20
1999-02-23
Wimer, Michael C.
Communications: radio wave antennas
Antennas
With radio cabinet
343749, 343860, 343895, H01Q 124
Patent
active
058749217
ABSTRACT:
An apparatus for providing an antenna impedance matching network that does not include mechanical switch contacts is disclosed. A retractable antenna includes a conductive plate moveable between the extended and retracted positions of the antenna. When the conductive plate is located in the extended position an impedance matching circuit responsive to the position of the conductive plate is connected between the antenna and an amplifier of a radio telephone. In response to location of the conductive plate in the retracted position, the impedance matching circuit is shorted out such that the antenna is connected directly to the amplifier via a capacitive effect between the conductive plate and a conductive coil of the shorted out impedance matching circuit.
REFERENCES:
patent: 2719920 (1955-10-01), Ellis
patent: 4862182 (1989-08-01), Egashira
patent: 4868576 (1989-09-01), Johnson, Jr.
patent: 4890114 (1989-12-01), Egashira
patent: 5212491 (1993-05-01), Chin et al.
patent: 5374937 (1994-12-01), Tsunekawa et al.
patent: 5546094 (1996-08-01), Egashira
patent: 5659889 (1997-08-01), Cockson
Doherty Peter James
Epperson Darrell
Ericsson Inc.
Wimer Michael C.
LandOfFree
Antenna impedance matching network requiring no switch contacts 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 impedance matching network requiring no switch contacts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Antenna impedance matching network requiring no switch contacts will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-311073