Telecommunications – Receiver or analog modulated signal frequency converter – With wave collector
Patent
1988-11-14
1990-02-20
Weldon, Ulysses
Telecommunications
Receiver or analog modulated signal frequency converter
With wave collector
343711, 343713, H04B 106
Patent
active
049033336
ABSTRACT:
Disclosed is here an apparatus for automatically adjusting a length of the antenna of the radio receiver in which the antenna is disposed to be integral with a high-frequency circuit section and a tuning circuit is configured to be in a variable capacity system. The apparatus includes a unit for detecting a condition that an intensity of an antenna input electric field is at least an optimal range so as to generate a first signal, a unit for detecting a condition that the intensity of the antenna input electric field is at most an optimal range so as to generate a second signal, a unit for detecting a condition that an interference signal is at least at a predetermined level so as to generate the second signal, a device for elongating the antenna based on the first signal, and a device for shortening the antenna based on the second signal.
REFERENCES:
patent: 2939950 (1960-06-01), Holmes
patent: 3010014 (1961-11-01), Tanimura et al.
patent: 3022420 (1962-02-01), Brinkerhoff
patent: 3143706 (1964-08-01), Michael
patent: 4397041 (1983-08-01), Takeda et al.
Alpine Electronics Inc.
Ogonowsky Brian D.
Shoup Guy W.
Weldon Ulysses
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