Design of wideband bandpass power divider with high rejection level stopband

WU Shaowei; ZHANG Hongying; LI Rong; WEI Yulong; LI Jinjun; TANG Cong

doi:10.13443/j.cjors.2017072402

Volume 32 Issue 6

Dec. 2017

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CHINESE JOURNAL OF RADIO SCIENCE > 2017 > 32(6): 644-649. > DOI: 10.13443/j.cjors.2017072402

WU Shaowei, ZHANG Hongying, LI Rong, WEI Yulong, LI Jinjun, TANG Cong. Design of wideband bandpass power divider with high rejection level stopband[J]. CHINESE JOURNAL OF RADIO SCIENCE, 2017, 32(6): 644-649. doi: 10.13443/j.cjors.2017072402

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Design of wideband bandpass power divider with high rejection level stopband

1.
University of Electronic Science and Technology of China, Chengdu 611731, China
2.
CNGC North Automatic Control Technology Institute, Taiyuan 030006, China

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Received Date: July 23, 2017
Available Online: December 30, 2020
Published Date: December 29, 2017

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Abstract

Abstract

In order to reduce the size of communication system, a wideband filtering power divider with high rejection level in the lower and upper stopband is proposed in this paper. Two bandpass filters (BPF) are utilized to replace the quarter-wavelength transmission line in the traditional Wilkinson power divider. A resistor is adequately arranged for isolation and impedance matching. Even-and odd-mode method is applied to obtain design equations of the proposed circuit. Finally, a prototype power divider with central frequency of 2.97 GHz, and the fractional bandwidth (FBW) of 62% is designed and fabricated for verification. Measured results indicate the attenuation level is larger than 38.4 dB in the lower stopband, and larger than 31.4 dB (2.67 f₀).
- power divider,
- filter,
- wideband,
- high selectivity,
- microstrip

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