I have an already working ZWave radio on my PCB. It has a PCB antenna and it's working perfectly. I need to add the Si4362 Low Current Receiver which is a receiver for the bands from 142 to 1050 MHz to my device.
Due to constraints in the PCB size and the fact that modifications to the enclosure are pretty much impossible at this stage of the project, I need to examine the possibility of sharing the PCB antenna between the ZWave transceiver IC and the Si4362 Receiver-only IC.
I took a look to the question Sharing antenna between receiver and transmitter but it deals with the fact that they are separate receiver and transmitter both for 433 MHz and the answer states that the antenna could be connected directly to both wich I don't think applies to my use case.
Also in the question Shared antenna on multiple 2.4Ghz receivers the answer suggest a power divider or splitter, but I don't need to just split the signal. I need to be able to switch between the two radios to decide at run time wich radio will use the antenna. Fortunately, both don't need to be active at the same time.
Also, I can't use chip antennas because ZWave doesn't allow that.
Does anybody know how to achieve this?