Design a reliable LDMOS module for avionic application

This paper describes a design technique of LDMOS module for avionics and military application. These techniques are particularly oriented in theories and computer aided design. We introduce a practical external matching network design topology to achieve a smaller physical size using microstrip line. The circuit analysis used both transmission line and electromagnetic method (EM) to avoid cover sensitivity effects and achieve equivalently current distribution. A practical LDMOS module was proposed to demonstrate the design module. As the result, the experimental data were in good agreement with the computer simulation data using AWR professional simulation tool.