Details

Autor(en) / Beteiligte

• Zheng-Lin Wen
• Yu-Nan Han
• Xiao-Yu Sun
• Ran Tao
• Jia-Ning Xia
• Xiu-Ming Chen
• Yong-Jiang Chen
• Zhong-Dao Chen

Titel

Design of miniaturized low-pass filter with improved Koch fractal DGS

Ist Teil von

• 2017 IEEE 5th International Symposium on Electromagnetic Compatibility (EMC-Beijing), 2017, p.1-4

Ort / Verlag

IEEE

Erscheinungsjahr

2017

Quelle

IEEE Xplore

Beschreibungen/Notizen

• A miniaturized microstrip low-pass filter (LPF) with ultra-wide stopband is proposed, where improved Koch fractal curve defected ground structure (DGS) resonators are implemented in its design. The improved Koch fractal DGS is composed of a specific schematic Π-shaped DGS with improved Koch fractal curve at both terminations. By using this structure, the filter not only supports conventional DGS performances such as a sharp transition to the stop band, but also exhibits an ultrawide stopband compared with traditional dumbbell-shaped DGS (DB-DGS) filters. The filter containing 2 unit cells has a compact size of 36.8×24 mm 2 and operates with an insertion loss of less than 1 dB from dc to 2 GHz. From 2.2 GHz to 6.3 GHz, the rejection is better than 40 dB. The proposed asymmetric Koch fractal DGS-LPF is easily integrated into RF/microwave circuitry at a low manufacturing cost, especially for wireless communication.