Design Of 60GHz Low Noise Amplifier With 0.18?m SiGe BiCMOS Technology

At present,the wireless communication infrastructure industry is facing the problem of heavy spectrum resources,the application with the frequency below 10 GHz tends to saturation,exploitation of the continuous frequency in 57-64 GHz millimeter wave spectrum,provides a great space for the crowded wireless communication.With WiGig and Wi-Fi to achieve cooperation,the next generation of WLAN using 60 GHz millimeter wave is a foregone conclusionLow noise amplifier(LNA)is the key circuit of the RF front-end receiver in a wireless communication system,mainly application for Mobile Telecommunication Base Station,such as Wireless Transceiver System,Tower Top Amplifier,Combiner ect.As the first stage of the RF receiving system,the main function of the LNA is to linearly amplify the weak signal received from the antenna and to expect the noise to be as small as possible.Performance parameters of the LNA will have a direct impact on the overall performance and sensitivity of the receiving system,with the narrowing width of the device,design of a low noise,high gain LNA has important significance.In the study of 60 GHz LNA,the single-ended and differential circuits with JAZZ 0.18?m SiGe BiCMOS technology is designed,achieved a small noise,high gain requirements.In the design of single-ended 60 GHz LNA,chooses common emitter configuration as the input stage to reduce the noise,for increas LNA's gain,using Cascode structure which has a high gain and good reverse isolation as subsequent circuit.Aiming at the problem of the signal reflection caused by the mismatch in the transmission,the emitter negative feedback inductance and the base series inductance were introduced,accomplishing input impedance matching and without introducing additional noise.The precision of DC bias will affected by the increase of base current from the resistance feed active bias circuit,therefore,on the basis of the resistive feed active bias circuit,a bias circuit complementary to the base current increment is added,forming a dual active bias circuit to compensate for the effect of base current increment,so,we can get a relatively stable bias for the pipe to work properly.In the software of Cadence environment,simulation results of single-ended 60 GHz LNA shown that: with the 3.3V supply voltage,at 60 GHz,the noise figure is 6.1dB,S21 is 21.8dB,S11 and S22 is-14.5dB and-18 d B respectively,the P-1d B is-24.7dBm.In the design of differential 60 GHz LNA,the input matching is optimized.Because of the large base series inductance at input matching,lead to the increase in layout area and Simulated parasitic effect,those will seriously affect the noise performance.A parallel capacitor was introduced to accomplish input matching.simulation results of differential 60 GHz LNA shown that: at 60 GHz,The noise figure achieves 5.6dB,S21 is 21.6dB,both input and output return losses S11 and S22 are below-15 d B from 57 GHz to 64 GHz,and P-1dB is-17.5dBm,obtain a better linearity LNA.