Hello! My design currently has QPL9054, but I am using it over wideband application ~2-6 GHz, your evaluation module says the matching network is optimized to 5-6 GHz. Do I need parallel capacitor into input/output pins to properly match or can I match using only single 100 pF series cap?
The standard eval board QPL9504EVB-01 is optimized for 5-6 GHz, but does operate over a wider band. The tuning on the board improves IRL and ORL over 5-6GHz. Increasing the input and output ac coupling capacitor values should help to improve performance below 5GHz. Otherwise it depends what performance you need over 2-6GHz. This is quite a wide bandwidth, so tuning to improve IRL and ORL over this whole range would be difficult. Operating wideband you may need to accept slightly worse IRL and ORL. What specifications do you need to meet over 2-6GHz?
We can tolerate ripple in the passband. Hoping to have some s11/s22 somewhere below 10 dB rl. This is also a demo platform and we can accept slightly degraded gain over the band since we have an attenuator pad after this component. We are in the layout stage so getting a matching network template would suffice.
Thanks!
-Ryan
OK thanks. I’d recommend obtaining an eval board so that you can test and tune to your application requirements before committing to layout. It should give you a feel of the wideband performance to expect.