Coaxial microwave modulator

Claim 2

A combination for modulating a carrier wave with a second wave to produce a modulated output, said combination comprising a microwave transmission line segment having an outer conducting sheath, said sheath having two diametrically opposed longitudinal slots cut therein parallel to the centerline of said sheath with said slots each having a length equal to one-half of the fundamental frequency portion of said second wave and, furthermore, said sheath having two diametrically opposite points therein each of which is equally located from the four extremities of said slots, nonlinear impedance means positioned in said sheath and direct current connected between said points, input means connected to one extremity of said segment to receive said carrier wave, input means connected to said point to receive Said second wave, and output means connected to the remaining extremity of said segment to make available said modulated output.

Claim 3

A combination in accordance with claim 1 in which said microwave transmission line segment comprises a coaxial line segment having a center conductor and the midpoint of said nonlinear impedance means is direct current connected to said center conductor.

Claim 4

A combination in accordance with claim 2 in which said nonlinear impedance means comprises a pair of diodes connected in series and poled in the same sense.

Claim 5

A combination in accordance with claim 1 in which said microwave transmission line segment comprises a waveguide segment and said nonlinear impedance means comprises at least one diode.

Claim 6

A combination for modulating a carrier frequency wave with a modulating wave, said combination comprising, a coaxial transmission line segment having inner an outer conductors with said outer conductor having cut therein a pair of diametrically opposed longitudinal slots parallel to the centerline of said segment and substantially equal in length to one-half the wavelength of the fundamental frequency of said modulating frequency wave, a first diode connected between said inner conductor and a first point on said outer conductor substantially equidistant from the four extremities of said slots, a second diode connected between said inner conductor and a second point on said outer conductor substantially diametrically opposite said first point, means connnected to said first and second points for applying said modulating wave, means connected to one end of said segment to receive said carrier frequency wave, and means connected to the other end of said segment to make available the output from said combination.

Claim 7

A combination for modulating a carrier frequency wave with a modulating wave, said combination comprising, a coaxial transmission line segment having inner an outer conductors with said outer conductor having cut therein a pair of diametrically opposed longitudinal slots parallel to the centerline of said segment and substantially equal in length to one-half the wavelength of the fundamental frequency of said modulating frequency wave, a first diode connected between said inner conductor and a first point on said outer conductor substantially equidistant from the four extremities of said slots, a second diode connected between said inner conductor and a second point on said outer conductor substantially diametrically opposite said first point, means connnected to said first and second points for applying said modulating wave, means connected to one end of said segment to receive said carrier frequency wave, and means connected to the other end of said segment to make available the output from said combination.