An Easily Constructed, Tuning Free, Ultra-broadband Probe for NMR

Details An Easily Constructed, Tuning Free, Ultra-broadband Probe for NMR An Easily Constructed, Tuning Free, Ultra-broadband Probe for NMR

2007-03-05

arxiv.org/abs/physics/0703054v2

Journal of Magnetic Resonance, Volume 188, Issue 1, September 2007, Pages 160-167

Physics

Instrumentation and Detectors

Scientific paper

10.1016/j.jmr.2007.05.025

We have developed an easy to construct, non-resonant wideband NMR probe. The probe is of the saddle coil geometry and is designed such that the coil itself forms a transmission line. The probe thus requires no tuning or matching elements. We use the probe with a spectrometer whose duplexer circuitry employs a simple RF switch instead of the more common lambda/4 lines, so the entire probe and spectrometer perform in an essentially frequency-independent manner. Despite being designed with electro- and magnetostatic formulas, the probe performs well at frequencies up to 150 MHz and beyond. We expect that with additional design effort, the probe could be modified for use at significantly higher frequencies. Because our construction method relies on commercial circuit fabrication techniques, identical probes can be easily and accurately produced.

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