An easily constructed, tuning free, ultra-broadband probe for NMR

D. Murphree, S. B. Cahn, D. Rahmlow, D. DeMille

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


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 λ/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.

Original languageEnglish (US)
Pages (from-to)160-167
Number of pages8
JournalJournal of Magnetic Resonance
Issue number1
StatePublished - Sep 2007


  • Broadband
  • NMR probe
  • Quadrupolar
  • Saddle coil
  • Transmission line

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Nuclear and High Energy Physics
  • Condensed Matter Physics


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