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. Author manuscript; available in PMC: 2017 Oct 1.
Published in final edited form as: IEEE Trans Microw Theory Tech. 2016 Sep 12;64(10):3217–3223. doi: 10.1109/TMTT.2016.2602835

Fig. 8.

Fig. 8

Measured S-parameters with the tunable high directivity coupler at (a) 298 MHz for 7 T, (b) 400 MHz for 9.4 T, and (c) 440 MHz for 10.5 T.