Tunable antenna apparatus and method for use with superheterodyn

Details Tunable antenna apparatus and method for use with superheterodyn Tunable antenna apparatus and method for use with superheterodyn

1990-06-14

1991-08-06

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455193, 455289, 343745, H04B 118

Patent

active

050384058

ABSTRACT:
An antenna tuning system and method are disclosed for use with a tunable receiver coupled to an external antenna, where the receiver has a local oscillator whose frequency is a function of the frequency to which the receiver is tuned. The tuning system includes circuitry for receiving the radio frequency emissions from the local oscillator, and for determining the frequency of those emissions. From the local oscillator frequency, the frequency to which the receiver is tuned is determined, and the antenna is tuned to match that frequency.

REFERENCES:
patent: 2896070 (1959-07-01), Fremont et al.
patent: 3299355 (1967-01-01), Jenks et al.
patent: 3372337 (1968-03-01), Beres
patent: 3626300 (1971-12-01), Kennedy
patent: 4085366 (1978-04-01), Padgett
patent: 4138654 (1979-02-01), Luhowy
patent: 4204166 (1980-05-01), Araki
patent: 4339827 (1982-07-01), Torres et al.

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