Design of Cascadable S-band Amplifier using Tunable Equalizer

Abstract

This paper explains the design and simulation of a 2-stage $S$-band cascadable amplifier using $pHEMT-ATF 54143$ with wide band characteristics. $A$ modified tunable equalizer is proposed using which the amplifier is operated in S-band. Tunability of the equalizer is verified by designing the amplifier in 2–3 GHz, 3- $4GHz$ and in the entire $S$-band (2–4GHz). The gain obtained from all the three designs are flat when compared with previously reported results using equalizer. $A$ theoretical formulation to calculate the $S_{21}$ of the device is proposed and validated.