I am trying to use a SPDT RF switch ( HMC547ALP3). As shown below in the datasheet and truth table, it seems that A and B can be used to control RF1 and RF2, respectively. I only need to use one channel to switch between signal and GND. So can I just control A or B and tied the other to low?
This will change this SPDT to a SPST. But I cannot find a SPST switch with a high bandwidth (20GHz). This switch is probably the best option for me.