Journal article
Regenerative feedback resonant circuit to detect transient changes in electromagnetic properties of semi-insulating materials
Review of scientific instruments, Vol.84(8), pp.084703-084703
08/2013
Handle:
https://hdl.handle.net/2376/106241
PMID: 24007084
Abstract
A prototype regenerative feedback resonant circuit has been developed for measuring the transient spectral response due to perturbations in properties of various electromagnetic materials. The circuit can accommodate a variety of cavity resonators, shown here in the 8 GHz range, with passive quality factors (Qstat) as high as 7000 depending upon material loading. The positive feedback enhanced dynamic quality factors (Qdyn) of resonator∕material combinations in the regenerative circuit are on the order of 10(7)-10(8). The theory, design, and implementation of the circuit is discussed along with real-time monitored example measurements of effects due to photon-induced charge carriers in high-resistivity silicon wafers and magnetic-field induced perturbations of yttrium-iron garnet.
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Details
- Title
- Regenerative feedback resonant circuit to detect transient changes in electromagnetic properties of semi-insulating materials
- Creators
- A Mark Jones - Pacific Northwest National Laboratory, Richland, Washington 99352, USAJames F KellyRonald H SevertsenJohn S McCloy
- Publication Details
- Review of scientific instruments, Vol.84(8), pp.084703-084703
- Academic Unit
- Mechanical and Materials Engineering, School of
- Publisher
- United States
- Identifiers
- 99900547130701842
- Language
- English
- Resource Type
- Journal article