Design of a Low Power Distributed Broadband Mixer

A millimeter-wave HEMT distributed mixer covering the RF frequency range from 9 to 31 GHz with IF frequencies from 10 to 80 MHz is presented. By employinguniform artificial transmission lines with charge injection technique, the proposed mixer demonstrates broadband characteristics at highmicrowave frequencies with maintaining high Conversion Gain and low DC power consumption. With a local oscillator power of 12 dBm, andRF power of -20 dBm, the proposed mixer has a Conversion Gain of -1.5 ~ 2 dB (without IF signal amplification), Noise Figure of 8.5 ~ 14.5 dB and 17 mW DC power consumptionover a broadband frequencies from 9-31 GHz. Mixer operation is demonstrated both for downconversion to fixed IF and for broadbandconversion using fixed LO frequencies. The simulated LO-to-RF isolation is better than 13 dB for overall operating frequency band. The topology of this mixer is suitable for monolithic implementation.

کلیدواژه ها:

distributed mixer ، ultrawideband ، millimeter-wave (MMW) ، broadband communication ، HEMT mixer