Reduced size elliptic UWB antenna with inscribed third iteration sierpinski triangle for on‐body applications

Leyva-Hernandez, Roberto; Tirado‐Méndez, José Alfredo; Jardón‐Aguilar, H.; Flores‐Leal, Ruben; Miranda, Roberto Linares y

doi:10.1002/mop.30361

Cited by 10 publications

(5 citation statements)

References 34 publications

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“…functionalities, e.g., circular polarization [6], multi-band [7] or MIMO operation [8], pattern/polarization diversity [9], let alone meeting additional requirements such as reduction of the physical size of the radiator [10], [11], calls for unconventional layouts [12]- [19]. These include incorporation of stubs [12], [13], slots [14], [15], defected ground structures [16], [17] or complex (e.g., spline-parameterized) profiles [18], [19] the exact effects of which cannot be quantified using analytical or equivalent network representations.…”

Section: And Implementation Of Variousmentioning

confidence: 99%

On Inadequacy of Sequential Design of Experiments for Performance-Driven Surrogate Modeling of Antenna Input Characteristics

Pietrenko‐Dabrowska

Koziel

2020

IEEE Access

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Design of contemporary antennas necessarily involves electromagnetic (EM) simulation tools. Their employment is imperative to ensure evaluation reliability but also to carry out the design process itself, especially, the adjustment of antenna dimensions. For the latter, traditionally used parameter sweeping is more and more often replaced by rigorous numerical optimization, which entails considerable computational expenses, sometimes prohibitive. A potentially attractive way of expediting the simulation-based design procedures is the replacement of expensive EM analysis by fast surrogate models (or metamodels). Unfortunately, due to the curse of dimensionality and considerable nonlinearity of antenna characteristics, applicability of conventional modeling methods is limited to structures described by small numbers of parameters within narrow ranges thereof. A recently proposed nested kriging technique works around these issues by allocating the surrogate model domain within the regions containing designs that are of high quality with respect to the selected performance figures. This paper investigates whether sequential design of experiments (DoE) is capable of enhancing the modeling accuracy over one-shot space-filling data sampling originally implemented in the nested kriging framework. Numerical verification carried out for two microstrip antennas indicates that no noticeable benefits can be achieved, which contradicts the commonsense expectations. This result can be explained by a particular geometry of the confined domain of the performance-driven surrogate. As this set consists of nearly-optimum designs, the average nonlinearity of the antenna responses therein is almost location independent, therefore optimum training data allocation should be close to uniform. This is indeed corroborated by our experiments.

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Section: And Implementation Of Variousmentioning

confidence: 99%

On Inadequacy of Sequential Design of Experiments for Performance-Driven Surrogate Modeling of Antenna Input Characteristics

Pietrenko‐Dabrowska

Koziel

2020

IEEE Access

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“…To make the port matching deeper [17], a Fibonacci circle fractal is circumscribed into the radiator, as well as to improve the bandwidth and to get a size reduction. The Fibonacci sequence seems to appear in different structures in nature, like sunflower seeds, leafs patterns, and even human anatomy [18].…”

Section: Antenna Design and Simulationsmentioning

confidence: 99%

Inscribed Fibonacci Circle Fractal in a Circular Radiator for Ultra-Wideband Antenna Operation and Size Reduction

Tirado‐Méndez

Martinez-Lara

Jardón‐Aguilar

et al. 2019

International Journal of Antennas and Propagation

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In this article, a Fibonacci circle fractal is inscribed into a circular radiator in order to provide ultra-wideband behavior as well as a 50% size reduction compared to a conventional circular monopole. The third iteration of the Fibonacci series allows the antenna to obtain a steady S11 parameter over the operation bandwidth, going from 2.7 GHz to 14 GHz, an average gain around 1 dB, with a quasi-omnidirectional radiation pattern and a group delay no bigger than 1 ns, suitable for short-pulsed communications.

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“…As previously mentioned, some designs depart from a monopole structure. To obtain UWB operation, a conventional monopole is generally modified [14], increasing the width of the body, taking the wipe structure to a wide shape, which can include circular, elliptical, triangular, or even rectangular forms. In this case, the antenna design starts from a cone-shaped radiator, mounted over a ground plane as observed in Fig.…”

Section: Antenna Designmentioning

confidence: 99%

Ultra‐wideband directive antenna based on an inclined cone body

Lopez-Arzate

Tirado‐Méndez

Caltenco-Franca

et al. 2018

IET Microwaves, Antennas & Propagation

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In this study, a transversal cut of a revolution surface body is inspired to obtain a planarised ultra‐wideband antenna. The revolution surface body is based on an inclined conical form to obtain a directive radiation pattern and a triangular reflector to increase the directivity. Once the optimal inclined angle is obtained, the three‐dimensional body is segmented obtaining a triangular cut, and the planarised radiator is optimised in order to improve the matching over the required bandwidth. To achieve so, the edges of the radiator are convex‐shaped and the resulting antenna performs from 2.8 to 13.1 GHz, for an S11 parameter below −10 dB. The antenna has a directive radiation pattern and an average gain of 7 dB over the entire bandwidth.

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Reduced size elliptic UWB antenna with inscribed third iteration sierpinski triangle for on‐body applications

Cited by 10 publications

References 34 publications

On Inadequacy of Sequential Design of Experiments for Performance-Driven Surrogate Modeling of Antenna Input Characteristics

On Inadequacy of Sequential Design of Experiments for Performance-Driven Surrogate Modeling of Antenna Input Characteristics

Inscribed Fibonacci Circle Fractal in a Circular Radiator for Ultra-Wideband Antenna Operation and Size Reduction

Ultra‐wideband directive antenna based on an inclined cone body

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