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Measured S11 plots of two monopoles loaded with the water phantom. (A) Without matching circuits and without the decoupling element; (B) With matching circuits and without the decoupling element; (C) With matching circuits and the decoupling element. The S11 of the coil elements could be improved to better than –28 dB with matching circuits added, indicating the monopole elements were well matched by using the L-shaped capacitive networks.
