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Progress In Electromagnetics Research
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ANALYSIS AND APPLICATION OF SHUNT OPEN STUBS BASED ON ASYMMETRIC HALF-WAVELENGTH RESONATORS STRUCTURE

By X. Li and H. Wang

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Abstract:
In this paper, the applications of shunt open stubs are reported based on asymmetric half-wavelength resonators structure. To demonstrate the design ideas, the analysis methods of ABCD matrix and equivalent circuit are used. The multi-band bandpass, miniaturization and harmonic suppression by application of the shunt open stubs are demonstrated. The measured insertion loss of the dual-band filter with the center frequency of 1.9 and 5.8 GHz is less than 2.7 dB. The insertion loss of the tri-band filter with the center frequency of 1.5, 4 and 6.3 GHz is less than 2.7 dB. Furthermore, a compact bandpass filter with size around 12.3 mm*11.5 mm is designed and fabricated. The bandwidth of the filter is 120 MHz with the center frequency of 2.4 GHz and the insertion loss is less than -3 dB. Especially, the insertion loss is less than -20 dB from 2.8 GHz to 7 GHz. For the filters above, the simulated results and the measured results agree well.

Citation:
X. Li and H. Wang, "Analysis and Application of Shunt Open Stubs Based on Asymmetric Half-Wavelength Resonators Structure," Progress In Electromagnetics Research, Vol. 125, 311-325, 2012.
doi:10.2528/PIER12010302
http://www.jpier.org/PIER/pier.php?paper=12010302

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