Communications: radio wave antennas – Antennas – With variable reactance for tuning antenna
Patent
1980-10-27
1983-04-19
Lieberman, Eli
Communications: radio wave antennas
Antennas
With variable reactance for tuning antenna
455123, H04B 1700
Patent
active
043807674
ABSTRACT:
A controlled antenna tuner comprises a power amplifier and a microprocessor, an attenuator connected to the power amplifier for selectively controlling the power output, a low pass filter connected to the power amplifier and microprocessor for channel frequency selection, a vertical standing wave ratio (VSWR) circuit inductively connected to the low pass filters output for determining the VSWR of the antenna, an impedance (magnitude) bridge and a phase detector bridge selectively connected to the low pass filter RF output and to the microprocessor for sensing the tuning status of an antenna, and an LC tuner network connected to the phase detector bridge and microprocessor, the microprocessor processing outputs of the impedance and phase detector bridges into tuning signals for the LC tuner to tune the antenna to the selected channel and storing the tuning signals for the selected channel for future use.
REFERENCES:
patent: 3381222 (1968-04-01), Gray
patent: 3818480 (1974-06-01), West
Goldstein Kenneth
Sharpe Claude A.
Comfort James T.
Grossman Rene E.
Lieberman Eli
Sharp Melvin
Texas Instruments Incorporated
LandOfFree
Controlled antenna tuner does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Controlled antenna tuner, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Controlled antenna tuner will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-838994