A Value-added Method to Design a Compact and Low Cost Hairpin Line Microstrip Bandpass Filter for Communication Systems

摘要

A value-added design method has been discussed for a multi-section Hairpin line microstrip bandpass filter at microwave frequencies. The design method may be used from a few hundred MHz to 10 GHz to serve the very basic purpose of reducing the overall size of the hairpin line band pass filters. Hairpin line resonator filters are relatively simple to design and build and are compact and low in cost. Two hairpin line microstrip band pass filters have been designed by using this value-added method. Simulation and optimization have been done by using Agilent-make software ADS 2005. These hairpin line filters have been fabricatyed by using very low cost metallized ABS-plastic substrate in place of very high cost RT-Duroid substrates. Finally these hairpin line bandpass filters have been tested on Vector Network Analyzer HP8510 (HP-make).