Low-cost wideband double-layer microstrip coupled-line directional coupler with high directivity
2014 (English)In: Microwave and optical technology letters (Print), ISSN 0895-2477, E-ISSN 1098-2760, Vol. 56, no 7, 1570-1575 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2014. Vol. 56, no 7, 1570-1575 p.
directivity, directional coupler, composite right/left handed materials, double-layer microstrip structure, isolation
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:hig:diva-18349DOI: 10.1002/mop.28391ISI: 000334916400017ScopusID: 2-s2.0-84899124444OAI: oai:DiVA.org:hig-18349DiVA: diva2:770024