Microstrip oscillator

Claim 1

A VERY HIGH FREQUENCY OSCILLATOR WHICH PROVIDES STABLE OPERATION UNDER SEVERE ENVIRONMENTAL CONDITIONS COMPRISING: (A) A HIGH FREQUENCY ELECTRONIC VACUUM TUBE HAVING A PLATE ELECTRODE, A CONTROL GRID ELECTROCE, AND A CATHODE ELECTRODE, (B) A THIN SHEET OF INSULATING MATERIAL HAVING FIRST AND SECOND PARALLEL SURFACES, (C) AN ELECTRICALLY CONDUCTING GROUND PLANE OF EXTENDED AREA BONDED TO SAID FIRST SURFACE OF SAID THIN SHEET OF INSULATING MATERIAL AND ELECTRICALLY CONNECTED TO SAID CONTROL GRID ELECTRODE OF SAID HIGH FREQUENCY ELECTRONIC VACUUM TUBE, (D) A FIRST ELECTRICALLY CONDUCTING STRIP OF LIMITED AREA BONDED TO SAID SECOND SURFACE OF SAID THIN SHEET OF INSULATING MATERIAL OPPOSITE SAID ELECTRICALLY CONDUCTING GROUND PLANE AND ELECTRICALLY CONNECTED TO SAID PLATE ELECTRODE OF SAID HIGH FREQUENCY ELECTRONIC VACUUM TUBE, SAID FIRST ELECTRICALLY CONDUCTING STRIP AND SAID ELECTRICALLY CONDUCTING GROUND PLANE FORMING A FIRST TRANSMISSION LINE HAVING A LENGTH AND TERMINATION TO PROVIDE AN INDUCTIVE REACTANCE WHICH RESONATES WITH THE PLATE-TO-GRID INTERELECTRODE CAPACITANCE OF SAID HIGH FREQUENCY ELECTRONIC VACUUM TUBE AT THE OPERATING FREQUENCY OF SAID OSCILLATOR TO PROVIDE A TANK CIRCUIT IN THE PLATE CIRCUIT OF SAID OSCILLATOR, AND (E) A SECOND ELECTRICALLY CONDUCTING STRIP OF LIMITED AREA BONDED TO SAID SECOND SURFACE OF SAID THIN SHEET OF INSULATING MATERIAL OPPOSITE SAID ELECTRICALLY CONDUCTING GROUND PLANE AND ELECTRICALLY CONNECTED TO SAID CATHODE ELECTRODE OF SAID HIGH FREQUENCY ELECTRONIC VACUUM TUBE, SAID SECOND ELECTRICALLY CONDUCTING STRIP AND SAID ELECTRICALLY CONDUCTING GROUND PLANE FORMING A SECOND TRANSMISSION LINE HAVING A LENGTH AND TERMINATION TO PROVIDE A CAPACITIVE REACTANCE TO ADJUST THE PHASE AND THE AMPLITUDE OF THE CATHODE DRIVE VOLTAGE TO THE PROPER CONDITIONS FOR OSCILLATION.