Electromagnetic modelling and design of multilayer coplanar waveguide lowpass filters

Abstract

A multilayer coplanar waveguide lowpass filter on a GaAs realised by using multilayer MMIC technology is presented and the performance is investigated with electromagnetic simulations. The filter is a Chebyshev type employing three low impedance sections and two high impedance sections. The low impedance sections have a characteristic impedance of 3 /spl Omega/. The high impedance lines use a narrow centre conductor mounted on top of the polyimide membrane layers in order to achieve as high an impedance as possible (100 /spl Omega/).