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.
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.