Telecommunications – Transmitter – Measuring – testing – or monitoring of transmitter
Patent
1979-11-28
1981-05-12
Ng, Jin F.
Telecommunications
Transmitter
Measuring, testing, or monitoring of transmitter
455123, 343703, 324 58A, H04B 1700
Patent
active
042675995
ABSTRACT:
There is provided a method of tuning an antenna after a transmitter is tuned using a dummy load by nulling a bridge having the antenna connected thereto and deriving energy from the transmitter coupled to the dummy load.
The antenna circuit is connected as one arm of a bridge circuit and a double pole double throw switch selects tune and transmit positions where the dummy load and antenna are respectively connected to the transmitter.
In the tuning position the transmitter is tuned while the antenna is effectively isolated so that it does not affect the transmitter tune up thereby simplifying and expediting tuning. The very small amount of power used to tune the antenna reduces the interference otherwise that would result from tune up of the antenna while connected to the transmitter. Thus, the antenna is tuned for a bridge circuit null indicating minimal standing waves before being connected to the transmitter for radio transmission.
During tuning of the transmitter the low resistive impedance of the dummy load prevents overload damage to the transmitter.
REFERENCES:
patent: 3117279 (1964-01-01), Ludvigson et al.
patent: 3846713 (1974-11-01), Kittel
patent: 4096441 (1978-06-01), Schwartz
Brown Laurence R.
Ginn Gregory R.
Ng Jin F.
LandOfFree
Antenna tuning system 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 tuning system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Antenna tuning system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2050522