Low‐cost wideband double‐layer microstrip coupled‐line directional coupler with high directivity | Zendy

Esfeh Babak Kazemi | Zendy; Raskin JeanPierre | Zendy; Moer Wendy | Zendy

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Low‐cost wideband double‐layer microstrip coupled‐line directional coupler with high directivity

Author(s) -

Esfeh Babak Kazemi,

Raskin JeanPierre,

Moer Wendy

Publication year - 2014

Publication title -

microwave and optical technology letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.304

H-Index - 76

eISSN - 1098-2760

pISSN - 0895-2477

DOI - 10.1002/mop.28391

Subject(s) - directivity , microstrip , rat race coupler , hybrid coupler , power dividers and directional couplers , bandwidth (computing) , wideband , microwave , materials science , magic tee , microstrip antenna , fabrication , optoelectronics , optics , acoustics , engineering , electronic engineering , electrical engineering , telecommunications , physics , antenna (radio) , medicine , alternative medicine , pathology

In this article, a low‐cost double‐layer microstrip structure with a gap space between the two substrate layers is used to develop a microstrip coupled‐line directional coupler with high directivity. The proposed design shows a high directivity (more than 20 dB) over a wide frequency bandwidth (more than 2 GHz). The double‐layer directional coupler, designed on FR4 substrate material at 2.4 GHz provides more than 30 dB isolation. The simulation and measurement results are in good agreement. By applying a simple and low‐cost fabrication process and design, the directivity of the directional coupler is enhanced by more than 10 dB compared with a microstrip structure. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1570–1575, 2014

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