A robust design of a numerically demanding compact rat‐race coupler. Issue 5 (May 2014)

• Record Type: Journal Article
• Authors: Kurgan, Piotr; Bekasiewicz, Adrian
• Is Part Of: Microwave and optical technology letters. Volume 56:Issue 5(2014:May)
• Page Start: 1259
• Page End: 1263
• Publication Date: 2014-05
• Subjects: Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.28300
• Languages: English
• ISSNs: 0895-2477

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>A fast and accurate design procedure of a computationally expensive microwave circuit has been presented step‐by‐step and experimentally validated on the basis of a compact rat‐race coupler (RRC) comprising slow‐wave resonant structures. The final compact RRC solution has been obtained by means of a sequential optimization scheme exploiting the implicit space mapping algorithm. A well‐suited surrogate optimization starting point as well as a considerable limitation of the surrogate optimization variables contribute significantly to the numerical efficiency of the method proposed. The final design, offering 85% size reduction together with a satisfactory performance, has been obtained with only a handful of EM simulations. The experimental validation of the method has been successfully conducted. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1259–1263, 2014</p> </abstract>