Filter
From Opendigitalradio
Filter in Bande 3
As you have seen on the other section of this wiki we need to filter uppers harmonics present at the output of the USRP, for example from the WBX daughterboard
We have tested the RBP-220W from Minicircuit, a pass band for the band 3.
The Filter give a flat response from 178 to 275 Mhz when soldered on the amplifier input strip line, the insertion loss on the same frequency range is equal to 1 dB.
This what we get when sweeping the signal arround the band (filter alone):
