A SENSITIVE LOW-POWER HOMODYNE REFLECTOMETER FOR IMPEDANCE MEASUREMENTS AT 0.25-1.0 GHZ

Authors
PIEPER JB PRICE JC
Citation
Jb. Pieper et Jc. Price, A SENSITIVE LOW-POWER HOMODYNE REFLECTOMETER FOR IMPEDANCE MEASUREMENTS AT 0.25-1.0 GHZ, Review of scientific instruments, 65(2), 1994, pp. 445-448
Citations number
5
Categorie Soggetti
Physics, Applied","Instument & Instrumentation
Journal title
Review of scientific instruments → ACNP
ISSN journal
00346748
Volume
65
Issue
2
Year of publication
1994
Pages
445 - 448
Database
ISI
SICI code
0034-6748(1994)65:2<445:ASLHRF>2.0.ZU;2-5
Abstract
We describe a single-sideband homodyne reflectometer for sensitive imp edance measurements in the 1 GHz range on electronic devices at liquid -helium temperatures and below. At 50 pW measurement power, the instru ment is capable of resolving a fractional change of 10(-5) in the impe dance of a nominally 50 Omega resistive device with a measurement time of one minute. We include details of an application to ac magnetocond uctance measurements on mesoscopic devices, and an in situ calibration method for this application.