Simplified matching and tuning experimental receive coils for low-field NMR measurements

•The theoretical circuit analysis performed – Fig. 1, Eqs. (1)–(10).•The optimization procedure for matching the coil – Eq. (9).•The theoretical analysis of matching and tuning performed – Fig. 2.•The noise spectral analysis performed – Fig. 3.•The arrangement of the coil tuning utilizing the noise – Fig. 4.•Results of the experiments – Fig. 5.