A wideband low noise amplifier with complementary transistors

Low noise amplifier is one of the most used blocks in a radar reciever such as fire control radar. In this paper, a broadband amplifier is proposed applying for the frequency range 2.5 to 5.5 GHz. The input stage of this circuit is defined as common-source. A standard 0.13 CMOS technology is used for simulation. Amplifier has a good stability thorough the frequency range of operation. The third order linearity is improved by derivative superposition method. the complementary transistors in the input stage was used to achieve good IP2 for proposed LNA. The simulation results show that the LNA achieved the maximum gain of 11.3 dB, input and output return loss lower than -8 dB, A minimum noise figure 2.3 dB in 2.5-5.5 GHz, an IP3 of -3.2dBm and an IP2 of +13.3 dBm. The power consumption is 18 mw from a 1.5V supply.