RESEARCH AND DEVELOPMENT OF SEMICONDUCTOR DIODES FOR USE IN HARMONIC GENERATOR APPLICATIONS USING SINGLE DIODES.
Quarterly progress rept. no. 1, 20 Sep-19 Dec 66,
MICROWAVE ASSOCIATES INC BURLINGTON MASS
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The high-order multiplier circuit to be developed must produce one watt of output power at 12 gigahertz and at 10 percent efficiency. The multiplication factor is nine or greater. The power requirement for this multiplier requires that the diode used have a breakdown voltage in the order of sixty volts and a capacitance of three picofarads. In order to resonate this diode at the output frequency, the inductance should be 0.06 nanohenries. The smallest varactor package available has an inductance much higher than this value and a conventional cavity resonator using a packaged diode is thus impossible. The approach discussed uses a diode mounted in a radial transmission line resonator. The transmission line forms the diode package and has a radial length slightly over a quarter wavelength. The high-capacitive impedance at the radial line edge is therefore transformed to a low-inductive impedance necessary to resonate with the low-capacitive impedance at the diode. Author
- Electrical and Electronic Equipment