Re: The need of duplexer in low power operation

Hi,

...

nanoBTS has both side. You can clearly see them here : http://openbsc.osmocom.org/trac/wiki/nanoBTS/Internals sysmoBTS I know has RX filters, I don't remember about TX.

Hum, I don't see how is that different from a duplexer if they have both Rx and Tx filters. Do you know any particular reason for this design?

It still exposes independent TX and RX lines allowing for external amplification / filtering if required.

Also in a duplexer you have a direct electrical connection rather than TX->RX radiation which means you need much more attenuation (often requiring the duplexer + subsequent band pass filters).

Cheers,

Sylvain