Microwave printed circuit negative resistance oscillator

Claim 2

An oscillator comprising a series direct current circuit including a diode and a resonant line, means to apply potential to said series circuit such that negative resistance is produced therein whereby oscillations appear in said resonant line, oscillation output means coupled to said resonant line at an intermediate point along said line, means for adjusting the frequency produced by said oscillator comprising a low loss dielectric element which is movable toward and away from said line at a point away from said intermediate point, and means to adjust the coupling of said line to said output means comprising a second low loss dielectric element which is movable toward and away from said line near said intermediate point.

Claim 3

The invention of claim 1 in which said resonant line is a conductor printed on one side of a dielectric sheet and in which said output means comprises a second conductor printed on the other side of said sheet, portions of said conductors being sufficiently close to provide coupling therebetween.

Claim 4

The invention of claim 2 in which said second conductor runs perpendicular to said first conductor with an end of said second conductor in at least partially over lapping position with respect to said first conductor.

Claim 5

The invention of claim 1 in which said low loss dielectric elements are of sapphire.

Claim 6

The invention of claim 4 which said sapphire elements extend particular to said resonant line.

Claim 7

An oscillation generator comprising a metallic structure comprising a chamber having walls, a sheet of dielectric material on one side of which a conductive resonant line is printed included in said chamber, a diode extending through and in contact with a wall of said chamber into contact with a point on and near an end of said resonant line, means for applying a potential across said line and said diode in series such that oscillations appear on said line, output means comprising a conductor also printed on said sheet, portions of said conductors being near each other, a low loss dielectric rod extending towards said resonant line, he end of said rod being close to the near portions of said line, and a second low loss dielectric rod extending towards a point on said resonant line remote from said near portions

Claim 8

An oscillation generator comprising a metallic structure comprising a chamber having walls, a sheet of dielectric material on one side of which a conductive resonant line is printed included in said chamber, a diode extending through and in contact with a wall of said chamber into contact with a point on and near an end of said resonant line, means for applying a potential across said line and said diode in series such that oscillations appear on said line, output means comprising a conductor also printed on said sheet, portions of said conductors being near each other, a low loss dielectric rod extending towards said resonant line, he end of said rod being close to the near portions of said line, and a second low loss dielectric rod extending towards a point on said resonant line remote from said near portions

Claim 9

The invention of claim 6 in which Said conductors are printed on respective opposite sides of said sheet and in which said near portions comprise the end of said conductor and an intermediate portion of said resonant line.

Claim 10

The invention of claim 6 in which said dielectric rods are extensions of respective conductive rods and said conductive rods extending through and being in contact with said walls of said chamber.

Claim 11

The invention of claim 8 in which said dielectric rods are sapphire.

Claim 12

The invention of claim 6 in which said chamber comprises a first and a second plate, there being a hollow in said first plate, said hollow having deep and shallow portions, a shield extending across said hollow and a resilient pad positioned between said shield and said second plate means for holding said plates together.

Claim 13

The invention of claim 6 in which the dielectric rods include metallic shank portions and are brought through a small diameter hole in the chamber walls, said hole being of sufficient length to prevent radio frequency energy from reaching the metallic portion of said rods.