A Dual-ISM-Band Antenna of Small Size Using a Spiral Structure With Parasitic Element

Buckley, John; McCarthy, K.G.; Loizou, Loizos; O’Flynn, Brendan; O’Mathuna, Cian

doi:10.1109/lawp.2015.2465831

Cited by 25 publications

(10 citation statements)

References 10 publications

(8 reference statements)

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“…In order to minimize (7) and, according to the guidelines reported in [19,20], a suitable implementation of the PSO [21][22][23][24][25][26][27][28][29] and of a geometry generator, able to modify and control the reference geometrical parameters, have been integrated with a method-of-moments (MoM) [30] electromagnetic simulator. Starting from the set of trial arrays ζ…”

Section: Mathematical Formulationmentioning

confidence: 99%

A Simple and Efficient Adaptive ISM-Band Antenna Based on a Reconfigurable Optically Driven Parasitic Structure

Donelli

2018

Electronics

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This paper describes the development and the realization of an adaptive antenna based on a reconfigurable parasitic structure. The geometry of the proposed antenna is circular, and it is composed by an active omni-directional radiator, surrounded by a number of parasitic elements that can be optically activated and configured as a director or as a reflector. The optical switches are activated by means of optic fibers in order to avoid electromagnetic perturbations. The optimized structure of the parasitic elements permits a high versatility since each parasitic element can act as reflector or director. Thanks to this structure, integrated with a suitable control software, it is possible to obtain a directive beam pattern that can be opportunely set in order to maximize the coupling with a desired signal and to attenuate the presence of interfering signals. A prototype has been designed, developed and experimentally assessed. The prototype has been integrated with a control software and the whole system has been numerically and experimentally tested. A good agreement between numerical and experimental results has been obtained demonstrating the capabilities of the proposed antenna prototype.

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Section: Mathematical Formulationmentioning

confidence: 99%

A Simple and Efficient Adaptive ISM-Band Antenna Based on a Reconfigurable Optically Driven Parasitic Structure

Donelli

2018

Electronics

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“…This article proposes a miniaturized MIMO Pentaband Hybrid Fractal Antenna (PHFA) which operates at 433 MHz (ISM), 2.4 GHz (ISM), 3.9 GHz (Fixed Satellite), 4.7 GHz (UWB) and 5.8 GHz (ISM) frequency bands. In comparison to the earlier configurations, the structure proposed here offers significantly lower levels of complexity and relative size, with comparable or better gain and bandwidth characteristics. The fractal geometry miniaturizes the antenna and provides considerable gain and bandwidth improvement, and a rectangular spiral slot in the centre of the radiating element introduces the 433 MHz operating band in the antenna.…”

Section: Introductionmentioning

confidence: 96%

“…Recently reported multiband antennas [1][2][3][4][5] yield several methods of generating multiple resonances. A smaller-sized antenna utilizing fractals is reported in Ref.…”

Section: Introductionmentioning

confidence: 99%

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A penta-band hybrid fractal MIMO antenna for ISM applications

Rajkumar¹,

Srinivasan²,

Natesan³

et al. 2017

Int J RF Microw Comput Aided Eng

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A miniature two‐element MIMO multiband planar patch antenna with potential applications in the ISM bands is presented. The elements of the antenna have been designed using a novel hybrid fractal geometry based on an altered Dragon Curve and the Inverted Koch. Reduced antenna dimensions are obtained with acceptable performance even at lower frequency ranges. The antenna elements are placed adjacent to each other with a very small spacing of 0.004 λ0 (λ being the free space wavelength of 433 MHz), confining the antenna dimensions to 51 × 50 mm2. The antenna resonates at the 433 MHz (ISM), 2.4 GHz (ISM), 3.9 GHZ (Fixed Satellite), 4.7 GHz (UWB) and 5.8 GHz (ISM) frequency bands. The antenna exhibits |S11| ≤ −10 dB, |S21| ≤ −16 dB, an ECC ≤ 0.01 for all operating frequencies, with circular polarisation at the 2.4 GHz and 5.8 GHz bands and linear polarisation at the others. The simulated structure was fabricated and tested, with the simulated and measured results displaying acceptable agreement.

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“…Some other researches on dual-band omnidirectional antenna have realized the miniaturized size. For example, a dual-ISM-band antenna using a spiral structure with parasitic element is also compact in size [9]. In [10], a stacked configuration is used for dual-band operation at 2.5 GHz and 3.5 GHz.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a Novel Miniaturized Dual-Band Omnidirectional Antenna for Wifi Applications

Yang¹,

Zhang²,

Zhang³

et al. 2020

PIER M

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In this article, a novel dual-band omnidirectional antenna for WiFi applications is presented and investigated. The proposed antenna is mainly composed of two pairs of half-wavelength dipoles with different lengths. It is fed by a microstrip balun, which provides a good impedance matching for desired dual-band operation. The dimension of the proposed antenna is only 50 mm × 10 mm × 1 mm (0.4λ 0 × 0.08λ 0 × 0.008λ 0 , and λ 0 is the wavelength of 2.4 GHz). The performance study of this dualband omnidirectional antenna with different geometric parameters has been conducted. The final design is fabricated and measured, and the results exhibit a good impedance bandwidth of approximately 19.2% for |S 11 | ≤ −10 dB ranging from 2.24 to 2.70 GHz centered at 2.4 GHz, and over 17.4% for |S 11 | ≤ −10 dB ranging from 4.73 to 5.6 GHz centered at 5.0 GHz. This antenna also has a stable gain of 2.09 ∼ 2.87 dBi and omnidirectional radiation patterns over the whole operating band. Dual-band coverage, stable omnidirectional radiation performance, simple structure, and miniaturized dimension make this antenna an excellent candidate for WiFi applications.

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A Dual-ISM-Band Antenna of Small Size Using a Spiral Structure With Parasitic Element

Cited by 25 publications

References 10 publications

A Simple and Efficient Adaptive ISM-Band Antenna Based on a Reconfigurable Optically Driven Parasitic Structure

A Simple and Efficient Adaptive ISM-Band Antenna Based on a Reconfigurable Optically Driven Parasitic Structure

A penta-band hybrid fractal MIMO antenna for ISM applications

Design and Analysis of a Novel Miniaturized Dual-Band Omnidirectional Antenna for Wifi Applications

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