Abstract
In this paper, low noise amplifier and mixer circuits are realized using 0.18μm CMOS technology in the frequency range of 3.1 to 10.6 GHz. LNA circuit uses the cascade topology with source degeneration technique, which help in reducing the non-linearity in the circuit. The current reuse topology is used to decrease the biasing voltage and hence to decrease the power consumption in the circuit. Realized circuit simulated in 0.18μm technology and various results shows highest gain S21 is 19.982dB and has the positive value in the entire frequency band, minimum NFmin is 1.270dB occurs at 1.27GHz and the highest NFmin is 3.4dB. S11 i.e. input reflection coefficient is -31.670dB and it is negative throughout the entire frequency range while the reflection at output port is report to be -7.449 dB. The resistive feedback topology helps in getting the flat gain in the frequency. Mixer circuit is also realize in 0.18μm CMOS technology, which uses current bleeding topology. Transformer help in converting the single ended signal into differential format. Maximum value of gain is 6.584dB, gain is positive in the entire RF frequency range, S11 i.e. the reflection at port1, which give the negative values in the entire frequency band, simulation of S12 i.e. leakage between the port 1 and 2 has negative values in the entire frequency band means proper isolation between the ports. The future work can the realization of the superheterodyne receiver in UWB band.
Published Version
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