Niraj Shalikram Yadav1, Miheer Pradeep Mayekar1, Rajesh Harsh1, and Vishal Dinesh Boricha1
1TID, Society For Applied Microwave Electronics Engineering & Research, Mumbai, India
coil when used as a transceiver coil for generating circularly-polarized fields
must operate in Quadrature mode. This is done with the help of a Hybrid
Coupler. Further to isolate the RF leakage signal in the receive path switches are introduced.
However, introducing an RF reflective switch in the receive path changes the
impedance at the receive port of the Coupler which causes
impedance mismatch at the coil terminals. We have inserted an absorptive
switch in the receive path of the coupler with an insertion of 0.45dB and
isolation of 22.48dB which ensures no impedance mismatch.