Electronically tunable antenna

Claim 1

A WIDE BAND RADIO RECEIVER EQUIPMENT COMPRISING A TURNABLE SIGNAL CIRCUIT, AN ANTENNA, A DIRECT CURRENT BLOCKING CAPACITOR ELECTRICALLY CONNECTED BETWEEN ONE END OF SAID ANTENNA AND A GROUND, A SEMICONDUCTOR CAPACITOR WHOSE CAPACITANCE IS A FUNCTION OF DIRECT VOLTAGE REVERSE BIAS, SAID SEMICONDUCTOR CAACITOR CONNECTED IN A LOOP PLING TRANSFORMER HAVING TWO SEPARATE WINDINGS ONE OF PLING TRANSFORMER HAVING TWO SEPARATE WINDINGS ONE OF SAID WINDINGS BEING CONNECTED TO SAID TURNABLE SIGNAL CIRCUIT TO FUNCTION AS SIGNAL INPUT ELEMENT OF SAID SIGNAL CIRCUIT, A FEED CABLE ELECTRICALLY CONNECTING ONE END OF THE OTHER WINDINGS TO A SELECTED POINT ON THE ANTENNA AND A BLOCKING CAPACITOR CONNECTED BETWEEN THE OTHER END OF THE OTHER WINDING AND SAID GROUND, AN ADJUSTABLE SOURCE OF DIRECT VOLTAGE BIAS MECHANICALLY JOINED TO SAID TURNABLE SIGNAL CIRCUIT FOR PROVIDING AN OUTPUT VOLTAGE WHICH HAS PREDETERMINED RELATIONSHIP WITH SIGNAL CIRCUIT TURNING AND ELECTRICAL CONNECTED BETWEEN SAID GROUND AND A POINT ALONG ANYONE OF SAID SECOND COIL, LEAD IN CABLE, ANTENNA, CONNECTIONS THEREBETWEEN, AND CONNTECTED BETWEEN ANTENNA AND SEMICONDUCTOR CAPACITOR, FOR APPLYING BIAS VOLTAGE TO SAID SEMICONDUCTOR CAPACITOR IN A PREDETERMINED RELATIONSHIP TO SIGNAL CIRCUIT TUNING OVER THE FREANTENNA TURNING TRACKS SIGNAL CIRCUIT TURNING OVER THE FREQUENCY BAND OF SAID RECEIVER EQUIPMENT.