Title :
Tunable Low-Loss UHF Circulator for Cryogenic Applications
Abstract :
A 600-MHz above-resonance circulator operating at 4.2 K has been constructed and successfully tested. Its high isolation (>30 dB), extremely low insertion loss (<0.1 dB), low VSWR (< 1.1), and acceptable instantaneous bandwidth (~6 percent) make it a promising device for utilization in narrow-band very low-noise systems.
Keywords :
Cryogenics; Diodes; Frequency; Insertion loss; Laboratories; Microwave Theory and Techniques Society; Microwave theory and techniques; Physics; Stripline; Tunable circuits and devices;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.1982.1131043
