Development in Fiber Bragg Grating Sensing Technology

Abstract

A V-band sub-harmonic mixer with an integrated frequency doubler and a 180 out-of-phase splitter using standard 0.13 lm CMOS technology is reported. The sub-harmonic mixer comprises a current-reused bleeding mixer, a baseband amplifier, a 180 (Wilkinsonpower-divider-based) out-of-phase splitter, and a frequency doubler. The mixer consumed 31.5 mW and achieved input return loss at RF port better than À10 dB for frequencies from 49.8 to 63 GHz. At IF of 20 MHz, the mixer achieved maximum conversion gain of 9.5 dB at RF of 53 GHz. The corresponding 3-dB bandwidth (x 3dB ) of RF is 9.6 GHz (48.4-58 GHz). The measured LO-to-RF and LO-to-IF isolation were better than 50 dB over the frequency band of interest. In addition, the measured input 1-dB compression point (P 1dB ) and input third-order intermodulation point were À8 dBm and 2.2 dBm, respectively, at RF of 60 GHz. These results demonstrate the proposed mixer architecture is very promising for high-performance V-band RFIC applications.