Publication

Abstract : This paper presents a mixer design which is targeted for software defined radio (SDR) for 5G technology. It is based on down-conversion Gilbert cell mixer optimized for 5G applications, operating within the frequency range-1 (FR1) of 700 MHz – 6 GHz. The design utilizes 45 nm low-power CMOS technology, requiring a 1.5 V supply voltage for efficient operation at 35.61 mA. Simulation results validate the mixer's performance which has a conversion gain of -2.32 dB, an input intercept point-3 (IIP3) of 15.667 dBm and a noise figure of 10.48 dB. These characteristics position the mixer as a robust solution for millimeter-wave (mmWave) applications by achieving high linearity and to work in sub-6 GHz 5G bands. The local oscillator-radio frequency (LO-RF) isolation exceeds -40 dB while local oscillator intermediate frequency (LO-IF) isolation surpasses -30 dB, and RF-IF isolation obtained above -30 dB. This ensures minimal interference between signal paths. The obtained specifications are promising for high performance radio.