IEEE Access (Jan 2024)

Suppressing Non-Ideal Resonance in Defected Ground Structure Based on Grounded Coplanar Waveguide

  • Tiansheng Ge,
  • Binglin Cheng,
  • Xu Han,
  • Yaxin Chen,
  • Hanbin Wang,
  • Jun Zhang,
  • Lin Lv,
  • Li Tao,
  • Wenjing Dong,
  • Houzhao Wan,
  • Guokun Ma,
  • Yiheng Rao,
  • Hao Wang

DOI
https://doi.org/10.1109/ACCESS.2024.3377140
Journal volume & issue
Vol. 12
pp. 42761 – 42768

Abstract

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In this paper, a new method is proposed and verified to eliminate the non-ideal resonance caused by DGS application in GCPW by adding via holes to reduce electromagnetic leakage. By adding a dense through-hole array around the dumbbell DGS can form an electrical wall to confine the electromagnetic to the central conductor. The test results show that the non-ideal resonance is eliminated after adding the through hole and a wide stopband from 16.1 GHz to 17.8 GHz with rejection larger than 20 dB. A double-dumbbell bandpass filter was successfully designed with this tech eliminating the non-ideal resonance at 8.053 GHz and 14.232 GHz. The results show that this structure can effectively eliminate the irrational resonance caused by electromagnetic leakage.

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