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Abstract:
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Microwave filler design using the non -redundant method relies on using the quarter wave Unit Elements (U .E's ) to create a complex pole and hence augment the filter skirt response as against the redundant method wherein the U .E's do not contribute towards the filtering action . Filters realized using this method may have series high impedance capacitors , which are not realizable in planar microstrip technology . This thesis proposes a method to integrate microstrip transmission line and coupled line elements to circumvent the problem of realizing series capacitance . The total number of transmission line elements required to realize the filter is the minimum number required by the multipole filter . The filter realized in this work is based on the work by Horton and Wenzel on realizing optimum quarter -wave TEM filters . Sonnet software is used to simulate and verify the calculations . The fabricated filter was measured using the network analyzer and the results are included . |