Design of third order band pass filter using coupled meta-material resonators

This paper presents a design and realization of a compact size third order coupled resonators band pass filter based on metamaterial split ring resonators. The proposed filter has center frequency of 2.4 GHz for wireless LAN applications with single transmission zero at 2.6 GHz. The filter design is based on the coupling matrix and external quality factor extraction and confirmed by experimental measurements. The results illustrates that the filter has pass band from 2.27 to 2.57 GHz and insertion loss lower than 0.7 dB is achieved within pass band. A Good agreement between simulated, theoretical and measured result is achieved. Moreover, the band pass filter has the advantage of compactness (its size is only 3 × 3 cm²).