I'm looking to follow up on a question (asked by another) that wasn't answered to my satisfaction in another question. RFID Antenna Array
I am successfully using the ID Innovations ID-2 chip to read 125kHz RFID tags. Furthermore, I have sucessfully tested connecting antennas with RG-58 coaxial cables with SMA connectors up to 8' in length. I now need to use need to use multiple antennas to scan in different locations using the same ID-2 reader IC.
I hesitate to use traditional analog multiplexers because the signal sent from reader to antenna is extremely analog, and ranges from a few mV to over 100V and I'm worried that the properties of MUX ICs will destroy the signal to/from the antenna.
I basically need a "2-pole,4-throw selector switch" that i can control with some I/O pins from an Arduino or other microcontroller.
Can anyone point me in the right direction? someone suggested using mosfets in comments on the other question? Thanks in advance!
I will make whatever board i develop to do this available as open source hardware.
Update: I would use something like an analog switch IC if it didnt seem like the signal would exceed the maximum voltage of the IC. Am I wrong?
Update2: Found some Solid State Relays that look like they might be the best of both worlds. Im going to go ahead with these for now. http://www.mouser.com/catalog/catalogusd/646/1981.pdf