Effcient Methodologies for Package OR housing Efect on Active MMIC and Signal Integrity Problems

Abstract

There has been a great demand in a Computer Aided Design (CAD) tool with a capability of design and analysis of gigahertz system having active Monolithic Microwave Integrated Circuit (MMIC)/Printed Circuit Boards (PCBs). For gigahertz system, previously neglected electromagnetic effects needs to be account into CAD tool for accurately predicating the performance of the system under test. The thesis proposes eand#64259;cient methodologies for two major issues encounter in design and testing of gigahertz system having active MMICs/PCBs: package/housing effect and signal integrity problems. newline newlineThe and#64257;rst part of the thesis discusses packaging/housing effect on active MMIC. When MMIC is mounted inside a test box or package/housing with a cavity, it may diand#64256;er from its RF on-wafer (RFOW) and circuit simulation performance. The metallic side walls of the package/housing may support several resonant modes which induce surface currents on the walls of the package/housing. These unwanted currents may damage the devices under test. This undesirable effect is called package/housing effect. Hence it is need to be derive a systematic methodology for analysis and investigation of the package/housing effects on active MMIC. newline newlinePresently there is no CAD tool available that predict directly packaging/housing effect on active MMIC with a cavity in a single run. The thesis presents an EM and#64257;eld analysis of active MMIC and packaging/housing effect on active MMIC. An experimental test case is used here to investigate and analyze the package/housing effect. Low Noise Ampliand#64257;er (LNA) MMIC is used as an experimental test case. In this dissertation, the theoretically cavity resonance problem is studied, the cavity resonance problem is investigated for the experimental test case using eigen mode solver and transient solver, and active non planar MMIC is modeled, simulated and analyzed the E/H and#64257;eld distribution due to the discontinuity presence in active MMIC. The pre mitigation technique -the selection of optimum test box dimensions is carried out and mod