Adaptive automatic antenna tuning method and apparatus

Details Adaptive automatic antenna tuning method and apparatus Adaptive automatic antenna tuning method and apparatus

1993-01-22

1996-01-09

Urban, Edward F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

4551931, 4551951, 4552262, H04B 118

Patent

active

054836883

ABSTRACT:
An improved method and apparatus for automatically tuning an antenna includes adaptive antenna tuning based on a current radio reception frequency and on prior antenna tuning cycles to establish a predictor value. The predictor value establishes an antenna tuning voltage sub-range most likely to contain the optimum antenna tuning voltage, but is a smaller range than the full antenna tuning voltage range. The antenna tuning voltage sub-range is then traversed while monitoring a signal strength indicator to identify an antenna tuning voltage providing optimum tuning conditions. Because only a sub-range of the full antenna tuning voltage range need be traversed, by virtue of the predictor value, relatively small increments in antenna tuning voltage may be used in traversing this sub-range. As a result, the execution time and accuracy of the antenna tuning method of the present invention is improved relative to prior automatic antenna tuning methods.

REFERENCES:
patent: 4291413 (1981-09-01), Henderson et al.
patent: 4334323 (1982-06-01), Moore
patent: 4862516 (1989-08-01), Macnak et al.
patent: 5136719 (1992-08-01), Gaskill et al.
patent: 5263183 (1993-11-01), Owen
patent: 5301358 (1994-04-01), Gaskill et al.

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