A new wideband modelling technique for spiral inductors

A new wideband modelling technique is presented, to exactly model the time-domain (TD) responses of microwave spiral inductors. This new method is suitable for modelling the spiral inductors used in switching-type microwave circuits, such as LC tank voltage-controlled oscillators (VCOs), or filters. The technique was developed based on applying an ultra-short impulse signal (30 ps) to the device. Furthermore, the layer-peeling technique (LPT) and hybrid equivalent circuits were used in the modelling process. Experiments were conducted to reveal the feasibility of the technique. Results show that the generated wideband models can be used to describe the TD responses of spiral inductors with a timescale down to picosecond order.