Microwave and Optical Technology Letters

Compact and high performance microstrip diplexer for GPS and WLAN application

Corresponding Author

Hong-wei Deng

[email protected]

College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaSearch for more papers by this author

Yong-jiu Zhao,

Yong-jiu Zhao

College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

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Yong Fu,

Yong Fu

College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

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Xiao-jun Zhou,

Xiao-jun Zhou

College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

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Yan-yun Liu,

Yan-yun Liu

Institute of Command Automation, PLA University of Science and Technology, Nanjing 210007, China

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Hong-wei Deng,

Corresponding Author

Hong-wei Deng

[email protected]

College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaSearch for more papers by this author

Yong-jiu Zhao,

Yong-jiu Zhao

College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

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Yong Fu,

Yong Fu

College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

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Xiao-jun Zhou,

Xiao-jun Zhou

College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

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Yan-yun Liu,

Yan-yun Liu

Institute of Command Automation, PLA University of Science and Technology, Nanjing 210007, China

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First published: 27 March 2013

https://doi.org/10.1002/mop.27550

Citations: 3

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Abstract

In this article, a novel compact and high performance microstrip diplexer is designed for global position system (GPS) and wireless local area network (WLAN) applications. The compact diplexer consists of two filters with short centered stepped impedance resonators (SCSIRs) and quarter-wavelength resonators (QWRs), operated at 1.575 GHz and 5.8 GHz, respectively. Due to the intrinsic characteristics and mutual loading effect of two filters, multiple transmission zeros can be generated to achieve sharp skirt, wide stopband, and high isolation of the diplexer. Moreover, more compact size can be obtained without the extra junction matching. Finally, a microstrip diplexer with 1 dB absolute bandwidth 100 MHz for GPS channel and 1 dB fractional bandwidth (FBW) of 3.45% at 5.8 GHz for WLAN channel is designed and fabricated. The simulated and measured results show a better agreement and validate the proposed theory. The size without the 50 Ω feedline is only 0.156 λ_g × 0.103λ_g, in which λ_g is the guided wavelength at 1.575 GHz. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1233–1237, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27550

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Volume55, Issue6

June 2013

Pages 1233-1237

Compact and high performance microstrip diplexer for GPS and WLAN application

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Compact and high performance microstrip diplexer for GPS and WLAN application

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