Using Advanced Design System to Design an MMIC AmplifierApplication Note Number 1462Agilent EEsof EDA2ContentsIntroduction...........................................................................................................3Two-Stage MMIC Amplifier Design............................................................................5Branch-Line Coupler Design..................................................................................16Conclusion..........................................................................................................29AppendixesAppendix A – Using the Advanced Model Composerto Create a Library of Inductor Models.........................................30Appendix B – Running the Design Rule Checker....................................................37General References on Balanced Amplifiers"Microwaves and RF Circuits: Analysis, Synthesi,s" Max W. Medley, Artech House, 1993, pp 509-541."Foundations for Microstrip Circ,u"it DesignT.C. Edwards, John Wiley and Sons, 1981, pp. 242-244.and Designs3IntroductionThere are many design steps required for the development and manufacture of MMIC circuits, as illustrated in the MMIC Design Flow. Advanced Design System (ADS) is a central part of the complete MMIC design flow, and is used throughout this process. This application note illustrates, through the design of an MMIC amplifier, several of the common problems faced in designing, simulating, and producing a physical layout of an MMIC circuit, as well as the validation steps that are needed to verify that the physical layout still produces the desired result. It is beyond the scope of this note to describe all possible design specifications for an MMIC circuit, but it does include enough specification and design steps to address many common des...
