Parameterized description of NMR signal reception systems part I: Impedance of transmission line and probe

Abstract

The impedance-matched condition and its relation to the reflection coefficient are discussed. Some important properties of transmission lines for impedance-matching are considered. Resonance tank circuits in NMR probes are discussed with analogies to microwave cavity resonances. By analyzing reflection coefficients in terms of Q factors, the impedancematched condition is re-derived in a manner that highlights practical considerations for high-frequency applications.

A modularized pulse programmer for NMR spectroscopy

“…On the basis of the previous work [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30], we have built a NMR console using four pulse programmers to validate their effectiveness. The console shown in figure 4 is a networked and distributed computer system, consisting of a master controller with a digital PFG waveform generator, two-channel RF transmitters, a digital IF receiver, a 2 H lock transceiver and a reference clock generator.…”