An Ultra wideband Low Noise Amplifier with cross coupling capacitors

In this paper, an ultra wideband amplifier is proposed applying for the frequency range 3.1 to 10.6 GHz. The structure of this circuit is defined as differential and common-gate. A standard 0.18 CMOS technology is used for simulation. Amplifier has a good stability thorough the frequency range of operation. The power consumption is 11 mw from a 1.8V supply. The simulation results show that the LNA achieved the maximum gain of 15 dB, input and output return loss lower than -10 dB and -8 dB respectively, A minimum noise figure is less than 4 dB in 3.1-10.6 GHz. Techniques used in the proposed circuit is using capacitive cross coupling circuits used in the conventional structure of wideband circuits that makes noise figure and gain improve the entire frequency range.