Design of a Ku-band MMIC LNA with a Simple T-type Input Matching Network

摘要

In this paper, the design of a wideband monolithic microwave integrated circuit (MMIC) lownoise amplifier (LNA) fabricated in 0.13-mu m GaAs pHEMT process is presented. A simple T-type input matching network (IMN) and a source feedback structure are employed to achieve low noise figure (NF). The MMIC LNA, which operates across 12-18 GHz, can be used for satellite applications. Experimental results show an NF around 1.5 dB in 12-17.5 GHz and a minimum NF of 1.21 dB at 16.5 GHz. In addition, a flat small-signal gain of 22 +/- 0.5 dB is achieved at 13.5-17.5 GHz. The input return loss is lower than -10 dB at 12-14.5 GHz and the output return loss is lower than -10 dB at 12-17 GHz. The power consumed is lower than 0.3W and the P-1dB (1-dB compression point) output power is around 13 dBm.