Design of a Microstrip Hairpin Bandpass Filter with Wide Stopband

doi:10.13190/j.jbupt.2020-077

Journal of Beijing University of Posts and Telecommunications ›› 2021, Vol. 44 ›› Issue (1): 92-96.doi: 10.13190/j.jbupt.2020-077

• REPORTS • Previous Articles Next Articles

Design of a Microstrip Hairpin Bandpass Filter with Wide Stopband

ZHENG Hai-yu, ZHU Wei-guang, ZHANG Zhi-tao, ZHANG Xin-lei, HU Shan-wen

College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China

Received:2020-06-18 Online:2021-02-28 Published:2021-09-30

Abstract

Abstract: To obtain a highly selective, wide stopband filter and meet the requirement of sub-6GHz band compact portable communication devices,a new type of microstrip hairpin bandpass filter is proposed. Compared with the conventional structure,the proposed adds a quarter-wavelength open microstrip line to the resonance unit which is connected to the input and output ends,and adds metal holes on both sides of the input feeder of the filter. The wide stopband is achieved by transmission zeros at the parasitic passband. The proposed filter is processed and tested. It is shown that it can realize a wide stopband and has good frequency selection characteristics.

Key words: hairpin structure, wide stopband, high selectivity, miniaturized filter, microstrip line

CLC Number:

TN713

ZHENG Hai-yu, ZHU Wei-guang, ZHANG Zhi-tao, ZHANG Xin-lei, HU Shan-wen. Design of a Microstrip Hairpin Bandpass Filter with Wide Stopband[J]. Journal of Beijing University of Posts and Telecommunications, 2021, 44(1): 92-96.

References

[1] Gao Xin, Feng Wenjie, Che Wenquan. Compact ultra-wideband bandpass filter with improved upper stopband using open/shorted stubs[J]. IEEE Microwave and Wireless Components Letters, 2017, 27(2):123-125.
[2] 朱永忠, 赵志远. 具有多传输零点的微带传输线滤波器设计[J]. 北京邮电大学学报, 2012, 35(5):77-80. Zhu Yongzhong, Zhao Zhiyuan. Design of a microstrip transmission line filter with transmission zeros[J]. Journal of Beijing University of Posts and Telecommunications, 2012, 35(5):77-80.
[3] Xia Xinlin, Cheng Xu, Deng Xianjin. Compact UWB bandpass filter with sharp roll-off using APCL structure[J]. Electronics Letters, 2018, 54(13):837-839.
[4] Levy Ralph, Snyder Richard V. Design of microwave filter[J]. IEEE Transactions on Microwave Theory and Techniques, 2002, 50(3):783-793.
[5] 李蓉. 微带滤波器的设计与仿真[D]. 成都:电子科技大学, 2008:54-58.
[6] Mahdi M, Majid T. Spurious-response suppression in microstrip parallel coupled bandpass filters by grooved substrates[J]. IEEE Transactions on Microwave Theory and Techniques, 2008, 56(7):1707-1713.
[7] Cheong Pedro, Fok Siweng, Tam Kamweng. Miniaturized parallel coupled-line bandpass filter with spurious-response suppression[J]. IEEE Transactions on Microwave Theory and Techniques, 2005, 53(5):1810-1816.
[8] Park J, Kim J, Nam S. Design of a novel harmonic suppressed microstrip low-pass filter[J]. IEEE Microwave and Wireless Components Letters, 2007, 17(6):424-436.
[9] Ahn D, Park J, Kim C, et al. A design of the low-pass filter using the novel microstrip defected ground structure[J]. IEEE Transactions on Microwave Theory and Techniques, 2001, 49(1):86-93.
[10] Fathelbab W, Steer M. Parallel-coupled line filterswith enhanced stopband performances[J]. IEEE Transactions on Microwave Theory and Techniques, 2005, 53(12):3774-3781.
[11] Mohammad Y, Hadi A, Ramezanali S. Design and integration of a high-order hairpin bandpass filter with a spurious suppression circuit[C]//Loughborough Antennas & Propagation Conference(LAPC). Loughborough:IEEE, 2015:1-4.
[12] Lotfi A, Lalbakhsh A. Improved microstrip hairpin line bandpass filters for spurious response suppression[J]. Electronics Letters, 2012, 48(14):858-859.
[13] Ludwig R, Bretchko P. RF circuit desin:theory and applications[M]. Englewood:Prentice Hall, 2002:40-180.

Design of a Microstrip Hairpin Bandpass Filter with Wide Stopband

RichHTML

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 2

Recommended Articles

Metrics

Comments

[1]	WANG Ya-fei. Crosstalk Cancellation Method of Multiple Coupled Transmission Lines Based on Channel Transmission Matrix [J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2016, 39(3): 126-131.
[2]	WANG Ya-fei, LI Xue-hua. The Use of Inverters for Crosstalk Suppression in Multiple Parallel-Coupled Microstrip Lines [J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2015, 38(2): 122-126.