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. Author manuscript; available in PMC: 2016 Oct 1.
Published in final edited form as: IEEE Trans Biomed Circuits Syst. 2014 Oct 28;9(5):725–732. doi: 10.1109/TBCAS.2014.2360383

Fig. 5.

Fig. 5

(a) The system diagram, (b) a single RF coil element with Pi matching network of digitally controlled capacitor array by PIN diodes switching, and (c) the impedance range of the capacitor array in (b) on the Smith chart.