I am not sure is it ok or not? I try to combine 2 receiver signal from 2 diferrent frequency at same band. The receiving signal will go to one antenna.
At lower frequencies (like shortwave), where reflections in the feedline might be less of an issue, you might be able to get away with less (simple parallel connection).
It can be a problem when the local oscillators in the receiver leak a little into the antenna (I know, poor design...but some older sets...) It the Lo of one radio happens to be anywhere near a frequency of interest (or any of the mixing products, for that matter) fall into the bandpass of the other receiver, there can be interference.
When it came to radio RPU receivers, I always installed ferrite circulators on the antenna inputs to the receivers. This helped eliminate any IM products which might be generated in the receiver front end, and also prevented any Lo or IF leakage from clobbering other receivers in the area, after all, we must keep the neighbors happy as well when it comes to shared antenna sites.
Thanks tlh0598!
You just gave me the right link.
I think I need a duplexer instead of power combiner.
I am actually designing WLAN Base Station with multiple radio. I don't want to have too many antennas. so, I combine the 2 receiver into one. And with a duplexer two channel frequency (2412 and 2462) can be combine.
So one antenna will receive 2 diff freq.
