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Microstrip Hybrid Coupler with a Wide Stop-Band Using Symmetric Structure for Wireless Applications.

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Title: Microstrip Hybrid Coupler with a Wide Stop-Band Using Symmetric Structure for Wireless Applications.
Authors: Rezaei, A.1, Noori, L.2 Leila_noori62@yahoo.com
Source: Journal of Microwaves, Optoelectronics & Electromagnetic Applications. Mar2018, Vol. 17 Issue 1, p23-31. 9p.
Subjects: Microstrip antenna design & construction, Wireless Application Protocol (Computer network protocol), Hybrid systems
Abstract: In this paper, a wide stop-band microstrip coupler is presented. The proposed structure consists of coupled lines and step impedance cells, which are integrated to operate at 2.82 GHz for wireless applications. This coupler is formed by a symmetric structure so that the locations of the output ports relative to input are quite similar. Accordingly, the magnitudes (also phases) of S21 and S31 overlap each other so that input signal can be selected through the output ports equally. There are little differences between the magnitudes and phases of S21 and S31 so that 0.97° phase shift is obtained. In comparison with previous works, the performance of the introduced coupler is improved. To get a better isolation, return loss and harmonic attenuation the frequency response is optimized without significant increase in circuit size. Moreover, the first, second and third harmonics of S21 and S31 are well attenuated as well as a wide stop-band is obtained up to 15.1 GHz. The realized coupler is fabricated and measured. There is a good agreement between simulated and measured results, which confirms the design process. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Microwaves, Optoelectronics & Electromagnetic Applications is the property of Brazilian Microwave & Optoelectronics Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Microstrip Hybrid Coupler with a Wide Stop-Band Using Symmetric Structure for Wireless Applications.
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Microwaves%2C+Optoelectronics+%26+Electromagnetic+Applications%22">Journal of Microwaves, Optoelectronics & Electromagnetic Applications</searchLink>. Mar2018, Vol. 17 Issue 1, p23-31. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Microstrip+antenna+design+%26+construction%22">Microstrip antenna design & construction</searchLink><br /><searchLink fieldCode="DE" term="%22Wireless+Application+Protocol+%28Computer+network+protocol%29%22">Wireless Application Protocol (Computer network protocol)</searchLink><br /><searchLink fieldCode="DE" term="%22Hybrid+systems%22">Hybrid systems</searchLink>
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  Label: Abstract
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  Data: In this paper, a wide stop-band microstrip coupler is presented. The proposed structure consists of coupled lines and step impedance cells, which are integrated to operate at 2.82 GHz for wireless applications. This coupler is formed by a symmetric structure so that the locations of the output ports relative to input are quite similar. Accordingly, the magnitudes (also phases) of S21 and S31 overlap each other so that input signal can be selected through the output ports equally. There are little differences between the magnitudes and phases of S21 and S31 so that 0.97° phase shift is obtained. In comparison with previous works, the performance of the introduced coupler is improved. To get a better isolation, return loss and harmonic attenuation the frequency response is optimized without significant increase in circuit size. Moreover, the first, second and third harmonics of S21 and S31 are well attenuated as well as a wide stop-band is obtained up to 15.1 GHz. The realized coupler is fabricated and measured. There is a good agreement between simulated and measured results, which confirms the design process. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Group: Ab
  Data: <i>Copyright of Journal of Microwaves, Optoelectronics & Electromagnetic Applications is the property of Brazilian Microwave & Optoelectronics Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1590/2179-10742018v17i11121
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      – Code: eng
        Text: English
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        PageCount: 9
        StartPage: 23
    Subjects:
      – SubjectFull: Microstrip antenna design & construction
        Type: general
      – SubjectFull: Wireless Application Protocol (Computer network protocol)
        Type: general
      – SubjectFull: Hybrid systems
        Type: general
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      – TitleFull: Microstrip Hybrid Coupler with a Wide Stop-Band Using Symmetric Structure for Wireless Applications.
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              Text: Mar2018
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              Y: 2018
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