Title :
Measurements of a Cryogenic Linear Polarization Modulator for mm-Wavelengths
Author :
Gault, A.C. ; Bierman, E.M. ; Hyland, P.O. ; Keating, B.G. ; Malu, S.S. ; Timbie, P.T.
Author_Institution :
Dept. of Phys., Univ. of Wisconsin-Madison, Madison, WI, USA
fDate :
4/1/2012 12:00:00 AM
Abstract :
Cryogenic Faraday phase modulators have been implemented in waveguide and tested in both a constant current mode and an alternating current mode. The loss of the phase shifter for DC currents that results in either a or phase shift is on average 1.45 dB over the entire W-band. In the modulating mode, it operates at frequencies as high as 4 Hz with transition times between the two phase states of 1.32 x 10-2 s.
Keywords :
cryogenic electronics; phase modulation; phase shifters; waveguides; DC currents; alternating current mode; constant current mode; cryogenic Faraday phase modulators; cryogenic linear polarization modulator; loss 4 dB; mm-wavelengths; phase shifter loss; transition times; waveguide; Ferrites; Frequency modulation; Phase modulation; Rectangular waveguides; Switches; Temperature measurement; Ferrite devices; modulation; superconducting magnet;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2012.2188622
