Abstract: The implementation of broadband monolithic baluns based on CMOS technology is investigated.The configuration and parameterized layout are analyzed.Then,a wide-band lumped element equivalent circuit model accounting for all necessary physical effects is proposed and model parameters are extracted,with high accuracy in a broadband frequency range,via combination of physical formula and fitting optimization.Two baluns were implemented with TSMC’s one-poly eight-metal (1P8M) 0.13μm mixed-signal (MS)/RF CMOS process.The S-parameters of these two baluns were measured using a vector network analyzer.The measured results agree well with the modeled parameters up to millimeter-wave frequencies.

Key words: modeling, millimeter-wave, CMOS