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Harmonic suppressed single groove PCML bandpass filter
Conference paper   Open access

Harmonic suppressed single groove PCML bandpass filter

J. Marimuthu and M. Esa
39th European Microwave Conference (EuMC) 2009 (Rome, Italy, 29/09/2009–01/10/2009)
2009
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Abstract

This paper presents the design of single grooved parallel-coupled microstrip bandpass filter with improved passband response and first harmonic suppression. The undesired first harmonic spurious response is suppressed through transmission zero frequency realignment method. A single groove is located at the center of the parallel-coupled line. It is employed for the realignment of the transmission zero and first harmonic frequencies. Two three-stage bandpass filters of different operating bandwidths were designed and implemented with optimized groove. The measured results validate real harmonics suppression performance with controllable single groove dimensions.

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