Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+/spl delta// intrinsic junction and its application in harmonic mixing at the millimeter waveband

In this paper, we report on the successful fabrication and characterisation of the Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+/spl delta// intrinsic junctions. To study the microwave influence of these intrinsic junctions, harmonic mixing was carried out in the millimeter waveband at temperatures ranging from 20 K to 77 K. Up to 68/sup th/ harmonic mixing in the 8 millimeter waveband and 56/sup th/ in the 3 millimeter waveband were clearly observed. The dependence of the intermediate frequency output on the temperature, the signal power and the local oscillator power were studied, and some unexpected features were observed.