Microwave wiring

This thesis is concerned with the analysis of the current distributions in coplanar parallel microstripline structures, and the calculation of crosstalk in these structures. This is accomplished by using a Finite Element Method approach. Two parallel strips, a right angle bend junction, and a T junction are studied in order to gain an insight into the current distributions and the primary causes of crosstalk. The control of crosstalk is also investigated, with alternative geometries for microstrip designs. It is seen that the finite element method can yield results comparable with other accepted methods, and other perceivable physical models of the test structures. Also shown in the present study that crosstalk can be reduced by decreasing the trace-to-ground plane separation.

PIN diodes and microstrip have found widespread use in modern
microwave systems. A design theory for the design of microwave
PIN diode switches and limiters is presented. Resonant
mi crostrip transmission line networks are shown to improve the
performance of packaged diodes. A systematic approach is used
to analyze the transmission line networks. Four types of
resonant diode switches are presented: an unmatched reverse
mode switch, a matched reverse mode switch, a series forward
mode switch, and a shunt forward mode switch. The utility of
this approach is illustrated by designing and testing several
PIN diode modules at both C and X-Band.