As Proven in Determine 12-sixteen, a typical touring-wave amplifier employs a multi­stage low-pass filter, consisting of possibly a transmission line or lumped inductances, with suitably pumped shunt varactor diodes supplying the shunt capacitances. The signal and pump frequencies are used with the enter conclusion of the circuit, as well as https://rf.vllis.com/en/product-category/narrowband-amplifier