Thick film dielectric overlay effects on thin and thick film microstrip bandpass filter

摘要

This paper reports the performance of thin and thick film microstrip band pass filter due to thick film Al_2O_3 overlay. The microstrip properties have been investigated for copper thin film component and silver thick film components. The thickness of the thick film overlay varies from 10 to 1000 μm. It is observed that the bandpass characteristics of both the versions of filter are highly dependent on the overlay thickness.