volume | PIER Journals

Abstract

A design of compact planar SIW filter with notch band characteristics is proposed. Double split square complementary split ring resonators are used to realize the ultra-wide band (UWB) characteristics. Proposed UWB filter contributes a passband from 2.9 GHz to 10.3 GHz with minimum insertion loss 0.7 dB at 3.7 GHz and maximum of 1.84 dB at 7 GHz. By employing complementary split ring resonator in the ground plane, a narrow band characteristic is obtained to reject the undesired wireless local area network (WLAN) signals. The notch band frequency ranges from 5 GHz to 5.7 GHz with insertion loss of 14 dB at center frequency. The 3 dB fractional bandwidth in the notch band is 12.9%. The variation of group delay less than 0.5 ns in the passband range. Overall size of the proposed filter is 0.35λ_g × 1.06λ_g. Because of these salient features, the proposed filter can be used for space applications.

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Mr. Senathipathi Udhayanan

Prof. Krishnan Shambavi