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2009-04-15

Harmonic Suppression of Parallel Coupled Microstrip Line Bandpass Filter Using CSRR

By S. S. Karthikeyan and Rakhesh Singh Kshetrimayum
Progress In Electromagnetics Research Letters, Vol. 7, 193-201, 2009
doi:10.2528/PIERL08122602

Abstract

Bandstop filter (BSF) is first constructed using open stubs and spurline. The stop bandwidth of this conventional structure is further increased by placing a complementary split ring resonator (CSRR) exactly below the 50 Ω microstrip line. By embedding this BSF with a wide rejection band in the input port of the PCML bandpass filter, unwanted passbands of bandpass filter is eliminated. To demonstrate this, we have designed, fabricated and tested a first order Chebyshev bandpass filter centered at 0.9 GHz with 10% fractional bandwidth (FBW). This bandpass filter is cascaded with the newly proposed BSF. Simulation and measured results shows a harmonic rejection upto 5f0 with more than 20 dB rejection level.

Citation


S. S. Karthikeyan and Rakhesh Singh Kshetrimayum, "Harmonic Suppression of Parallel Coupled Microstrip Line Bandpass Filter Using CSRR," Progress In Electromagnetics Research Letters, Vol. 7, 193-201, 2009.
doi:10.2528/PIERL08122602
http://www.jpier.org/PIERL/pier.php?paper=08122602

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