Ka-band high-$T_c$ superconductor and III-V semiconductor hybrid balanced mixer
- Kwak, M.H. (Dept. of Electrical Enginnering. Gyeongsong National Univ.) ;
- Suh, J.D. (Telecomm. Basic Research Lab.) ;
- Kang, Kwang-Yong (Telecomm. Basic Research Lab.) ;
- Han, S.K. (Telecomm. Basic Research Lab.)
- Published : 2000.08.16
Abstract
We demonstrated a single balanced mixer of the combination of high-T. superconductor (HTS) and III-V GaAs beam lead Schottky diodes operating in the mini-cryogenic chamber. The HTS hybrid mixer was designed with a center frequency of 27.5 GHz and a bandwidth of 1 GHz, and consisted of a rat-race coupler circuit with beam-lead diodes attached to its balanced ports. The HTS hybrid mixer with 1 GHz RF bandwidths exhibits a conversion loss of 6 dB. A LO-to-RF isolation was greater than 40 dB in the range of operating frequencies. Since the HTS/III-V hybrid mixer devices have lower noise and conversion loss, this technique provide us with new capabilities that can be effectively utilized in the field of local-point distribution service (LMDS) systems.