Microwave/millimeterwave oscillator using transferred electron device

Claim 1

Microwave/millimeter wave signal translating apparatus comprising: a waveguide transmission line having a predetermined impedance and a broad wall; a transferred electron device having a predetermined impedance and being adapted to operate at a first frequency, said device being disposed within said waveguide transmission line in a predetermined position with a first terminal having a flange generally parallel to said broad wall with a predetermined diameter electrically connected to ground potential and a second terminal electrically connected to a disc generally parallel to said broad wall disposed within said waveguide above said device, said disc being dimensioned to form a quarter wavelength quasi-radial mode cavity with said flange to enable said device to oscillate at a second frequency higher than said first frequency; means connected to said device for coupling a D.C. bias to said device to cause said device to oscillate at said second frequency; means connected to said device for varying said device and said disc position above said broad wall to vary said second frequency of device oscillation; and movable turning means disposed within and movable along the length of said waveguide substantially (2n+1)λ/4 from said device position for matching the impedance of said device to said predetermined impedance, λ being the guide wavelength in said waveguide transmission line at said second frequency.