Single-Dielectric Wideband Partially Reflecting Surface With Variable Reflection Components for Realization of a Compact High-Gain Resonant Cavity Antenna

Lalbakhsh, Ali; Afzal, Muhammad U.; Esselle, Karu P.; Smith, Stephanie; Zeb, Basit Ali

doi:10.1109/tap.2019.2891232

Cited by 89 publications

(44 citation statements)

References 26 publications

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“…At the same time, it is more challenging. By far, the most popular solution techniques are population‐based metaheuristics (genetic algorithms, particle swarm optimizers, differential evolution, firefly algorithm, and many others), which are capable of rendering the entire Pareto set in a single algorithm run while retaining global search capabilities. Unfortunately, their computational complexity is tremendous so that they can normally be applied if the evaluation cost of the structure under design is not of concern (eg, an analytical or equivalent network model is utilized).…”

Section: Introductionmentioning

confidence: 99%

Accelerated multiobjective design of miniaturized microwave components by means of nested kriging surrogates

Pietrenko‐Dabrowska

Koziel

2020

Int J RF Microw Comput Aided Eng

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Design of microwave components is an inherently multiobjective task. Often, the objectives are at least partially conflicting and the designer has to work out a suitable compromise. In practice, generating the best possible trade‐off designs requires multiobjective optimization, which is a computationally demanding task. If the structure of interest is evaluated through full‐wave electromagnetic (EM) analysis, the employment of widely used population‐based metaheuristics algorithms may become prohibitive in computational terms. This is a common situation for miniaturized components, where considerable cross‐coupling effects make traditional representations (eg, network equivalents) grossly inaccurate. This article presents a framework for accelerated EM‐driven multiobjective design of compact microwave devices. It adopts a recently reported nested kriging methodology to identify the parameter space region containing the Pareto front and to render a fast surrogate, subsequently used to find the first approximation of the Pareto set. The final trade‐off designs are produced in a separate, surrogate‐assisted refinement process. Our approach is demonstrated using a three‐section impedance matching transformer designed for the best matching and the minimum footprint area. The Pareto set is generated at the cost of only a few hundred of high‐fidelity EM simulations of the transformer circuit despite a large number of geometry parameters involved.

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Section: Introductionmentioning

confidence: 99%

Accelerated multiobjective design of miniaturized microwave components by means of nested kriging surrogates

Pietrenko‐Dabrowska

Koziel

2020

Int J RF Microw Comput Aided Eng

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“…Such a technique was also applied for return loss improvement . Over the last decade, the use of metamaterials has opened a new door in designing microwave and electromagnetics components . In Reference , the application of a π‐shaped transmission‐line coupled to a specialized metamaterial structure resulted in a power divider operating in three bands, while the overall footprint is significantly smaller than the conventional Wilkinson power dividers.…”

Section: Introductionmentioning

confidence: 99%

A neuro‐based approach to designing a Wilkinson power divider

Jamshidi

Lalbakhsh

Lotfi

et al. 2019

Int J RF Microw Comput Aided Eng

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In this paper, a new neuro-based approach using a feed-forward neural network is presented to design a Wilkinson power divider. The proposed power divider is composed of symmetrical modified T-shaped resonators, which are a replacement for quarter-wave transmission lines in the conventional structure.The proposed technique reduces the size of the power divider by 45% and suppresses unwanted bands up to the fifth harmonics. To verify the concept, a prototype of the power divider has been fabricated and tested, exhibiting good agreement between the predicted and measured results. The results show that the insertion loss and the isolation at the center frequency are about 3.3 ± 0.1 dB and 23 dB, respectively. K E Y W O R D Sartificial intelligence, couplers, evolutionary optimization, harmonic suppression, lumpedequivalent circuit, microstrip technology, neural network, Wilkinson power divider

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“…In contrast, the compact designs have lower gain than others [7], [12]. Whereas, the compact RCAs obtaining high gain and wideband require multi-superstrate layers [6], [15], [16], [18] or complex superstrate structures [8], [10], [14], [17]. These RCAs have been focused on the study of novel feed patch and superstrate structures.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the RCAs with microstrip superstrate are attractive structures with various configurations. Three general microstrip superstrates are frequency selective surface (FSS) [6], [10], [12]- [14], [17], metamaterial slab (MM slab) [10], [15], [16], [18], and parasitic patches (PPs) [5], [9], [14]. Their brief behaviors are summarized in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Compact High Gain Resonant Cavity Antenna With via Hole Feed Patch and Hybrid Parasitic Ring Superstrate

Dang

Seo

2019

IEEE Access

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A compact and high gain resonant cavity antenna (RCA) is investigated in this work. At first, a ray-tracing model and the full-wave analysis are presented to clarify the characteristics of RCA in cases of finite lateral size and inhomogeneous superstrate. In consequence, a novel compact, high gain, and wideband RCA is proposed. The RCA consists of a via hole feed patch and an array of hybrid parasitic rings fabricated on a superstrate. The via holes feed patch with a high radiation directivity significantly enhances the RCA's gain. On another hand, the dimension and bandwidth of the RCA are improved by the hybrid parasitic ring superstrate which is constituted by non-periodic parasitic patch and rings. Finally, a prototype of the RCA is fabricated and measured. With only the dimension of 1.35λ 0 × 1.35λ 0 × 0.63λ 0 , the peak gain of 15.8 dBi and 3 dB gain bandwidth of 10.7% are obtained. INDEX TERMS Resonant cavity antenna, compact, high gain, non-periodic microstrip superstrate, hybrid parasitic ring.

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Single-Dielectric Wideband Partially Reflecting Surface With Variable Reflection Components for Realization of a Compact High-Gain Resonant Cavity Antenna

Cited by 89 publications

References 26 publications

Accelerated multiobjective design of miniaturized microwave components by means of nested kriging surrogates

Accelerated multiobjective design of miniaturized microwave components by means of nested kriging surrogates

A neuro‐based approach to designing a Wilkinson power divider

Compact High Gain Resonant Cavity Antenna With via Hole Feed Patch and Hybrid Parasitic Ring Superstrate

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