Vol. 14

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2010-05-06

Compact Dual-Mode Open Stub-Loaded Resonator and BPF

By Hong-Wei Deng, Yong-Jiu Zhao, Xue-Shun Zhang, Lu Zhang, and Wei Zhao
Progress In Electromagnetics Research Letters, Vol. 14, 119-125, 2010
doi:10.2528/PIERL10032904

Abstract

A compact dual-mode open stub-loaded resonator and bandpass filter (BPF) is proposed in this paper. The resonator, which is formed by attaching a disc-shaped open stub and circular open stubs in pairs to a high impedance microstrip line, generates two operating modes in the desired band, and the even-mode resonance frequency can be flexibly controlled by the disc-shaped open stub at central plane, whereas the odd-mode one is fixed. The four transmission zeros are created to sharpen the rejection skirt, suppress two high harmonic resonant modes and deepen upper-stopband, respectively. Experimental results of the dual-mode filter which incorporates this resonator with parallel-coupled feed line with tuning stub at 5.8 GHz show good agreement with the simulated ones. The size for the resonator is only 4.7 × 3.4 mm (0.29λg×0.21λg in which λg is the guided wavelength of 50 Ω microstrip at 5.8 GHz).

Citation


Hong-Wei Deng, Yong-Jiu Zhao, Xue-Shun Zhang, Lu Zhang, and Wei Zhao, "Compact Dual-Mode Open Stub-Loaded Resonator and BPF," Progress In Electromagnetics Research Letters, Vol. 14, 119-125, 2010.
doi:10.2528/PIERL10032904
http://www.jpier.org/PIERL/pier.php?paper=10032904

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