One of my primary interests recently has been WSPR reception. I have found that WSPR is an excellent mode for receiver and antenna optimisation.
The input from the antenna is distributed to the receivers by an Elad ASA-15 antenna splitter. Two Red Pitaya boards act as WSPR receivers running Apline linux software by Pavel Demin. Each Red Pitaya can decode 8 bands simultaneously.
Presently, no impedance transformation solution is in circuit for the Red Pitayas and they are directly connected to the Elad. The Red Pitaya’s antenna ports are high impedance inputs. The current receive performance across the frequency range seems satisfactory in the present arrangement.