Microstrip Bandpass Filter Design (Combline)

Mohamad Hamizan , Tuah (2009) Microstrip Bandpass Filter Design (Combline). Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This project is about designing a wide bandpass microstrip filter that will operate at the industrial, scientific and medical (ISM) band. The ISM band was an unlicenced band which is originally reserved internationally for the use of RF electromagnetic field for industrial, scientific and medical purposes other than telecommunication. A bandpass microstrip filter working at the ISM band will reject other frequency outside the ISM band. The design process will be started by obtaining the order of the filter base on the specification given. Then, lumped element bandpass filter will be designed. Next is the realization to microstrip structure process. The dimension of microstrip such as the length, width and spacing of the microstrip filter will be determined by using filter realization method. Simulation was done by using Microwave Office software to observe the S11 and S21 of the filter. The next process is to fabricate the designed microstrip bandpass filter on the FR4 boar and measurement will be done on the fabricated filter by using network analyzer. The procedure, results and discussion were discussed in this report.

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