Scalable Modeling for the CPW Gap Discontinuity at Frequency up to 150 GHz The coplanar waveguide (CPW) gap discontinuity is an important component of many applications in the monolithic microwave integrated circuits (MMICs). Therefore, accurate modeling of the CPW gap discontinuity is very important and fundamental for the design of MMICs. In this work, a new lumped equiva1entcircuit model which can accurately describe the characterization of the CPW gap discontinuity from 0 to 150 GHz is proposed. The parameters are extracted from electromagnetic (EM) simulations simply and conveniently without any complicated optimization algorithms. And we make the model scalable in gap length, width and space. Satisfactory fitting accuracy is obtained between the model data and EM simulations, which verifies that our model can be implemented in computeraided design software to reduce design time and save computer resources.

A 2240.5 GHz UWB LNA Design in 0.15um GaAs This paper presents an ultrawideband lownoise amplifier (UBW LNA) design for 5G communication and other millimeterwave applications. In the proposed LNA design, the common source stage with inductive degeneration is used for a better input matching, and the Pi network is used for the ultrawideband matching. The proposed UBW LNA is demonstrated using 0.15 um GaAs process. According to the postlayout simulations, the LNA operates from 22 GHz to 40.5 GHz, and a maximum gain of 20 dB and minimum noise figure of 3.4 dB are achieved. The LNA achieves a 59% 3 dB and a 48% 1 dB smallsignal S 21  bandwidth.