A D-Band Sub-Harmonically Pumped Mixer with High LO Suppression Using 250-nm InP DHBT P-N Junction

This paper reports the prototyping and experimental results of the 150 GHz sub-harmonically pumped up-conversion mixer using 250-nm InP DHBT anti-parallel P-N junction. The junction size is optimized for minimizing the intermodulation distortion. The measured conversion loss of 15 dB, the 3rd order input intercept point of +5 dBm and RF to LO suppression of more than 20 dB are obtained. It shows the InP DHBT's potential use of passive mixer without inter-stage filter for the higher functionalities integration.