Dual Band Microstrip Filter

Wan Mohd Azlan, Wan Mustapha (2012) Dual Band Microstrip Filter. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This project proposed a novel dual-band microstrip parallel-coupled SIR-BPF based on the traditional single-band coupled theory. The scope of this project presented analyze, simulation, fabricate, and measurement for parallel-coupled SIR-BPF design. Parallel-Coupled SIR-BPF is one of the popular methods to design dual-band microstrip filter because of the simplicity and compactness. The filter is designed at center frequencies of 1.3 GHz and 2.8 GHz bandwidth 25 MHz and 55 MHz. this frequency is presenting for wireless video transmitter application and Worldwide Interoperability for Microwave Access (WiMAX). There are several step to design this filter that including by determine filter specification, order of filter, bandpass filter prototype elements, bandpass transformation, physical dimensions calculations (width, spacing, length), and wavelength guide. The simulation of the dual-band microstrip filter will be done using Advance Design System 2008 software. The fabrication process will do on FR4 substrate by using etching process. Improvement technique will be introduced to get better response for scattering parameter (S11 and S21). Simulation results of this dual band filter shows that the values of S21 are -0.004 dB for low frequency and -0.006 dB for high frequency. Moreover, for values S11 are -31.172 dB for low frequency and -16.09 dB for high frequency.

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