NDLI: Rapid simulation-driven design of miniaturised dual-band microwave couplers by means of adaptive response scaling

Content Provider	IET Digital Library
Author	Koziel, Slawomir Bekasiewicz, Adrian
Abstract	One of the major challenges in the design of compact microwave structures is the necessity of simultaneous handling of several objectives and the fact that expensive electromagnetic (EM) analysis is required for their reliable evaluation. Design of multi-band circuits where performance requirements are to be satisfied for several frequencies at the same time is even more difficult. In this work, a computationally efficient design of dual-band microstrip couplers is demonstrated by means of an adaptive response scaling (ARS) technique. ARS is a surrogate-assisted method that exploits a fast surrogate of the high-fidelity EM-simulation model of the coupler at hand constructed from its corrected equivalent circuit. ARS identifies nonlinear frequency and amplitude response scaling that accommodates the misalignment between the low- and high-fidelity models. Due to exploiting the knowledge embedded in the low-fidelity model ARS surrogate exhibits excellent generalisation capability. It is demonstrated here by optimisation of a dual-band microstrip coupler with enhanced bandwidth, working at 1 GHz and 2 GHz frequencies. The optimised design has been obtained at the cost of just a few high-fidelity EM simulations of the structure. Numerical comparisons indicate superiority of ARS over competitive surrogate-assisted techniques. Experimental validation is also provided.
Starting Page	1135
Ending Page	1140
Page Count	6
ISSN	17518725
Volume Number	10
e-ISSN	17518733
Issue Number	Issue 11, Aug (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/10/11
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2016.0136
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2016-08-20
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Adaptive Response Scaling Amplitude Response Scaling ARS Technique Circuit Optimisation Circuit Reliability Compact Microwave Structure Design Optimisation Dual-band Circuit Design Dual-band Microstrip Coupler Optimisation Dual-band Microwave Coupler Miniaturisation Rapid Simulation-driven Design Electromagnetic Analysis EM Analysis Equivalent Circuit Frequency 1 GHz Frequency 2 GHz Generalisation Capability High-fidelity EM-simulation Model High-fidelity Model Low-fidelity Model Microstrip Couplers Multiband Circuit Design Nonlinear Frequency Response Scaling Numerical Comparison Optimisation Technique Reference Design Reliability Space Mapping Surrogate-assisted Method UHF Couplers Waveguide And Microwave Transmission Line Component
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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