A wideband bandpass filter with improved out-of-band performance

José L. Olvera-Cervantes; Alonso Corona-Chavez; D. V. B. Murthy; Humberto Lobato-Morales

doi:10.1587/elex.6.1143

LETTER

A wideband bandpass filter with improved out-of-band performance

José L. Olvera-Cervantes, Alonso Corona-Chavez, D. V. B. Murthy, Humberto Lobato-Morales

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Keywords: microwave filters, bandpass filters, resonator, microstrip filter

JOURNAL FREE ACCESS

2009 Volume 6 Issue 16 Pages 1143-1147

DOI https://doi.org/10.1587/elex.6.1143

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Abstract

A novel compact wide bandpass filter is proposed by cascading two square-ring resonators, a quarter wave length short-stub and a quarter wavelength open-stub. This filter offers wide passband, with high out-of-band rejection and suppression of second spurious harmonic. Design procedure of a filter at 1GHz with 50% fractional bandwidth is presented showing good agreement between simulation and experimental results.

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