Title :
High efficiency submillimeter frequency multipliers
Author_Institution :
Millitech Corp., South Deerfield, MA, USA
Abstract :
Solid-state sources have been developed for 330 and 500 GHz using cascaded varactor multipliers driven by a Gunn oscillator. The 330-GHz source uses a cascade of two balanced doublers, achieving very high efficiency, and produces an output of 4 mW. The 500-GHz source uses a cascade of a balanced doubler and single diode tripler and produces 0.7 mW. The doubler output at 330 GHz has been used to drive a harmonic mixer at 660 GHz, and plans are to drive yet another doubler at 660 GHz, where an output of 0.1-0.2 mW is expected. The output may prove to be enough LO for a cooled Schottky diode mixer. The tripled power at 500 GHz is quite sufficient for operation of Schottky diode mixers at this frequency and should be adequate as a pump source for a low-power doubler at 1 THz, such as would be used with a superconductor-insulator-superconductor (SIS) mixer.<>
Keywords :
frequency multipliers; solid-state microwave devices; 0.7 mW; 330 GHz; 4 mW; 500 GHz; 660 GHz; Gunn oscillator; THF; balanced doublers; cascaded varactor multipliers; harmonic mixer; high efficiency; submillimeter frequency multipliers; submillimeter wave devices; Capacitance; Coupling circuits; Cutoff frequency; Diodes; Educational institutions; Gunn devices; Oscillators; Radio astronomy; Solid state circuits; Varactors;
Conference_Titel :
Microwave Symposium Digest, 1990., IEEE MTT-S International
Conference_Location :
Dallas, TX
DOI :
10.1109/MWSYM.1990.99817
