As Demonstrated in Determine 12-sixteen, a normal traveling-wave amplifier employs a multi­stage very low-go filter, consisting of both a transmission line or lumped inductances, with suitably pumped shunt varactor diodes supplying the shunt capacitances. The signal and pump frequencies are used within the input conclusion of your circuit, along with https://rf.vllis.com/en/product-category/narrowband-amplifier