Comparison of active dual‐gate and passive mixers for terahertz applications

The authors propose four versions of a dual-gate active down-conversion mixer for H-band applications. operates at local oscillator (LO) frequency 240 GHz. It is designed maximum conversion gain and large bandwidth least 50 GHz from 220 to 270 Furthermore, the .optimised operate low LO power levels beneath 0 dBm. This renders hungry buffer stages redundant. Hereby, necessary chip size overall consumption fully integrated receivers can be drastically reduced. Four different downconverter were designed. Firstly, layout transistors was changed conventional multi-transistor cell design topology within multi-finger transistor cell. Secondly, two on-chip solutions decouple drain voltage intermediate (IF) signal realised facilitate zero-IF conversion: resistive an load. results are presented advantages disadvantages usage in terahertz applications thoroughly analysed. Finally, mixers compared state-of-the-art with regard gain, bandwidth, linearity, noise figure size.