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Reduced size microstrip fractal filter with suppressed second harmonic

Esa, Mazlina and Hassan, Norhaslinda and Mohd. Abas, M. Amin and Nik Abdul Malik, Nik Noordini and Fisal, Norsheila (2009) Reduced size microstrip fractal filter with suppressed second harmonic. In: Asia Pacific Microwave Conference (APMC 2009), 2009, Suntec Singapore International Convention & Exhibition Center .

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Official URL: http://dx.doi.org/10.1109/APMC.2009.5384477

Abstract

This paper presents the design of a reduced size microstrip fractal filter. It has an added capability of suppressing the undesired second harmonic, located at twice the fundamental frequency. The basic configuration is the conventional parallel-coupled filter (CPC). It suffers from undesired spurious responses located at the second harmonic, which causes asymmetry in the upper skirt band. The undesired second harmonic can be harmful to components in a communication system. A CPC filter is first designed. Then, Koch fractal shape is applied, forming the KF filter. Finally, a reduced size fractal shaped, RKF, filter is designed by realigning the fractal sections. All three filters have been simulated and measured. It can be concluded that the employed fractal shape can improve harmonic suppression by a factor of 2. RKF is comparable to KF, but exhibits size reduction of more than half.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:koch filter, fractal shape, harmonic suppression, reduced size, spurious response
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:15654
Deposited By: Liza Porijo
Deposited On:05 Oct 2011 09:04
Last Modified:05 Oct 2011 09:04

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