A 320 GHz Frequency Quadrupler Based on 40 nm CMOS Technology

This letter presents a terahertz(THz) multiplier by four using two-stage push-push structure [1]. An 80 GHz Balun and a 160 GHz Balun are implemented by Marchand Balun structure and good performance of amplitude balance and phase balance are achieved as well as low insertion loss. The simulation results show that the output 3dB bandwidth is 70 GHz ranging from 270 GHz to 340 GHz. The quadruapler has a frequency conversion loss less than 13 dB. At the same time, good fundamental rejection greater than 30 dB and low DC power consumption 8 mW are achieved. The whole circuit is designed on 40 nm CMOS technology and occupies area of $\pmb{710 \mu\text{m} \times 400\mu \text{m}}$ including pads.