X-band Filter-Amplifier for Radio Frequency Front-End Receiver Systems

Abstract

This paper presents an integrated design of substrate integrated waveguide (SIW) bandpass filter (BPF) with a discrete low noise amplifier (DLNA). The SIW BPF was designed to match the complex source impedance of the low noise transistor (LNTR) and acted as the input matching network (IMN). For validation, a DLNA was designed for X-band application with the center frequency $(f_{0})$ of 10 GHz. At $f_{0}$, the measured small-signal gain and noise figure of the proposed DLNA with SIW BPF IMN are 12.85 dB and 2.15 dB, respectively. The proposed DLNA provides high out-of-band signal suppression.