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Progress In Electromagnetics Research Letters
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HIGH-PERFORMANCE LPF USING COUPLED C-SHAPE DGS AND RADIAL STUB RESONATORS FOR MICROWAVE MIXER

By A. K. Belbachir, M. Boussouis, and N. Amar Touhami

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Abstract:
A high-performance microstrip low-pass filter (LPF) with low cutoff frequency, negligible passband insertion loss, very sharp transition band, and deep ultra-wide stopband is designed, fabricated and measured. The presented filter is realized using three types of resonators which are coupled C-shape defected ground structure (C-CDGS), mirrored series-resonant branch loaded by radial stub, and high impedance line loaded by radial stub. A novel equivalent circuit model of the C-CDGS resonator is created, and its corresponding parameters are also extracted. The proposed filter is experimentally verified through the measured results which show good agreement with electromagnetic simulations.

Citation:
A. K. Belbachir, M. Boussouis, and N. Amar Touhami, "High-Performance LPF Using Coupled C-Shape DGS and Radial Stub Resonators for Microwave Mixer," Progress In Electromagnetics Research Letters, Vol. 58, 97-103, 2016.
doi:10.2528/PIERL15090105

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