New circuit model for RF probe pads and interconnections for theextraction of HBT equivalent circuits

A new circuit model for RF probe pads and interconnections is proposed, and this model and previous models are compared with measured S parameters of probe pad and interconnection test structures. A modified parameter and interconnnection model was used to determine an HBT equivalent circuit. Excellent agreement is obtained between the extracted equivalent circuit and measured HBT S parameters, while providing physically acceptable parameter values