We are trying to design a filter that works at low sample rates and with low bandwidths. The LTE5 example filter design works really well for us, but we are trying to get a filter designed at <= 2MHz TX RF bandwidth, but so far we have not had any luck. Is there any guide we can follow to get a low frequency filter design working?
We are testing with two AD9361 in a null modem configuration through U-FL cables.
Any help will be greatly appreciated.