Design and Comparison of Different Matching Techniques for Low Noise Amplifier Circuit

Abstract This paper describes the design of Low Noise Amplifier (LNA) circuits with different types of matching circuits at the input side and output side at 6 GHz. This paper compares the results of all possible combinations of ‘T’ and ‘L’ type matching circuits. The designed circuit is simulated with Advanced Design System (ADS) software. Each circuit is simulated for, with and without stabilizing circuit and feedback circuit. RLC series circuit is applied as feedback circuit and to improve the stability of the LNA circuit. Of all LNA matching circuits the TL matching gives better results in the stabile region than L-L matching, L-T matching and T-T matching. Under stability condition forward gain and noise figure of T-L match is 14.14 dB and 1.81 dB which is better than L-L match as 10.39 dB and 2.15 dB , L-T match as 5.237 dB and 2.47 dB and T-T match as 6.468 dB and 3.9 dB.