300-GHz Wireless Data Transmission System with Low-Snr CMOS RF Front End

A 300-GHz wireless data transmission system based on CMOS usually has low-signal-to-noise-ratio (SNR)output because of both a low output power of a transmitter (TX)and high noise figure of a receiver (RX). As a result, high-gain antennas are commonly employed to make transmission distance longer under the condition. Additionally, its ultra-high operation frequency and its wide channel bandwidth make TX noise dominant, which is mainly generated from phase noise. In this paper, a simple level diagram of the low-SNR CMOS RF front end at operating frequency of 300 GHz is described. And, the 300-GHz wireless transmission system based on CMOS, which had a data rate of 24Gbit/s with 16QAM at a distance of 50 centimeters, was demonstrated using 33-dBi hiah-gain antennas.