Wideband Two-Section Branch-Line Coupler Using Microstrip Technique | ||||
| Menoufia Journal of Electronic Engineering Research | ||||
| Article 56, Volume 28, ICEEM2019-Special Issue, 2019, Page 189-193 | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjeer.2019.77011 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Ramy Mohammad Khattab; Abdel-Aziz Taha Shalaby | ||||
| dept. of electronics and communication engineering faculty of electronic engineering menofia university Menouf, Egypt | ||||
| Abstract | ||||
| This paper introduces a compact quadrature hybrid coupler for wideband applications. Using the conventional technique of cascading two sections in a quadrature hybrid we designed a broadband coupler at a central frequency of 1.8 GHz. To improve the performance of this coupler and to reduce its size we used the artificial transmission line concept, microstrip line loaded with shunt open ended stubs, and meandering lines. A size reduction of about 31% was achieved compared to the conventional one. The proposed design has a relative bandwidth of 33.3 %, and return loss and isolation loss are both better than 18 dB on the entire band. The proposed coupler has been simulated using the CST Studio suite, fabricated, and measured. A good agreement has been obtained between the simulated and measured results. | ||||
| Keywords | ||||
| Broadband coupler; CST Studio suite; open ended stubs; compact quadrature hybrid | ||||
| References | ||||
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