Millimeter Wave Gunn Amplifier, Diode Characterization and Network Optimization.
Technical document 1 Jan-1 Jul 74,
NAVAL ELECTRONICS LAB CENTER SAN DIEGO CALIF
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A Ka-band amplifier structure with 7.5 GHz bandwidth and 6 dB gain was fabricated. Simple adjustments lead to 15 dB gain with 2.5 GHz bandwidth. Measurements utilize double cosine tapered waveguide matching sections terminated by reduced height waveguide and calibrated sliding shorts. From slotted line measurements of reflection coefficients, two port cavity S parameters may be obtained. Insertion of the diode gives new reflection coefficients from which diode impedance can be separated. The accuracy of the calculated diode and waveguide parameters can be checked by testing calculated reflection gain vs. measured reflectometer gain over the frequency range using various calibrated short positions. Using the diode terminal impedance data, computer optimized matching circuits can be designed for particular gain and bandwidth requirements. Author
- Electrical and Electronic Equipment