Antenna tuned circuit for a superheterodyne receiver

Antenna tuning circuit

Antenna tuning circuit for AM radio receiver

Antenna tuning controller

Antenna tuning system for operation over a predetermined frequen

Antenna unit and receiving circuit

Antenna-switching diversity receiver capable of switching...

Antenna-switching diversity receiver capable of switching...

Antenna/amplifier and method for receiving orthogonally-polarize

Antenna/like impedance matcher

Anti-theft arrangement for a sound-reproducing apparatus install

Anti-theft system for a radio receiver used particularly in a mo

Aperture-coupled line Magic-Tee and mixer formed therefrom

Apparatus and method for a radio frequency (RF) receiver...

Apparatus and method for acquiring and processing radio signals

Apparatus and method for amplifying an amplitude-varying signal

Apparatus and method for antenna attachment

Apparatus and method for automatic selection of broadband...

Apparatus and method for automatically controlling a reference f

Apparatus and method for automatically programming frequency...