[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.4283/JMAG.2013.18.2.178

Development of a Wideband EPR Spectrometer with Microstrip and Loop Antennas

Ponomaryov, A.N. (Department of Physics, Chung-Ang University)
Choi, K.Y. (Department of Physics, Chung-Ang University)
Suh, B.J. (Department of Physics, The Catholic University of Korea)
Jang, Z.H. (Department of Physics, Kookmin University)

Publication Information

Journal of Magnetics / v.18, no.2, 2013 , pp. 178-182 More about this Journal

Abstract

We have developed a new non-conventional electron paramagnetic resonance (EPR) spectrometer, in which no resonant cavity was used. We previously demonstrated a wide frequency range operation of an EPR spectrometer using two loop antennas, one for a microwave transmission and the other for signal detection [1]. In contrast to Ref. [1], the utilization of a microstrip antenna as a transmitter enhanced a capability of wide-band operation. The replacement of conventional capacitors with varactor diodes makes resonance condition easily reproducible without any mechanical action during tuning and matching procedure since the capacitance of the diodes is controlled electronically. The operation of the new EPR spectrometer was tested by measuring a signal of 1,1-diphenil-2-picrylhydrazyl (DPPH) sample in the frequency range of 0.8-2.5 GHz.

Keywords

electron paramagnetic resonance; microstrip; varactor diode; microwave tuning and matching circuit;

Citations & Related Records

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