M. Mola et al., Instrumentation for millimeter-wave magnetoelectrodynamic investigations of low-dimensional conductors and superconductors, REV SCI INS, 71(1), 2000, pp. 186-200
We describe instrumentation for conducting high sensitivity millimeter-wave
cavity perturbation measurements over a broad frequency range (40-200 GHz)
and in the presence of strong magnetic fields (up to 33 T). A millimeter-w
ave vector network analyzer (MVNA) acts as a continuously tunable microwave
source and phase sensitive detector (8-350 GHz), enabling simultaneous mea
surements of the complex cavity parameters (resonance frequency and Q value
) at a rapid repetition rate (similar to 10 kHz). We discuss the principle
of operation of the MVNA and the construction of a probe for coupling the M
VNA to various cylindrical resonator configurations which can easily be ins
erted into a high field magnet cryostat. We also present several experiment
al results which demonstrate the potential of the instrument for studies of
low-dimensional conducting systems. (C) 2000 American Institute of Physics
. [S0034-6748(00)02301-7].