Study of Patch Antennas with Koch Curve Form Slots

Fonseca, Daniel; Pereira, Feliphe; Vitor, Ulysses R. C.

doi:10.1590/2179-10742019v18i31672

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…After a classical hand-calculation for patch antennas, which can be verified in [15], simulations were performed using the Keysight Advanced Design System (ADS) to optimize the performance of the DPA. The microstrip feed line, for both patches, was made as a cutout in a radiating edge, which is inset to a 50 Ω driving point [16], [17].…”

Section: A Antenna Designmentioning

confidence: 99%

Double Patch Antenna Array for Communication and Out-of-band RF Energy Harvesting

Silva

Paz

Cambero

et al. 2020

J. Microw. Optoelectron. Electromagn. Appl.

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This paper presents a patch antenna array topology for Simultaneous Wireless Information and Power Transfer (SWIPT) applications. The resulting Double Patch Antenna Array (DPA) is composed of two patch antennas operating at different frequencies and fabricated on a unique substrate. One of the patches operates at the 1.8 GHz mobile communication band and is used for wireless communication, while the other one operates at the 2.4 GHz Industrial, Scientific, and Medical (ISM) band, and is used for Radio Frequency Energy Harvesting (RFEH). The analyzes and measurements carried out have shown that the adopted topology has satisfactory performance for communication, with a gain of 1.5 dBi, and for out-of-band energy harvesting, with a Vout of 160 mV at 2.45 GHz. These results indicate this approach as a promising strategy for low-power wireless applications.

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Section: A Antenna Designmentioning

confidence: 99%

Double Patch Antenna Array for Communication and Out-of-band RF Energy Harvesting

Silva

Paz

Cambero

et al. 2020

J. Microw. Optoelectron. Electromagn. Appl.

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“…Thus, multiband antennas should operate in the desired frequency bands allocated for these applications: 2.45 GHz (2.4-2.5 GHz), 5.8 GHz (5.725-5.875 GHz), and 3.5 GHz (3.4-3.7 GHz), respectively. In order to meet these requirements, in addition to meeting the widespread demand for antennas that are light-weight, low-cost, and easy to fabricate, microstrip antennas represent the best solution for use in most applications [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Miniature Slotted Semi-Circular Dual-Band Antenna for WiMAX and WLAN Applications

Naji

2020

J Electromagn Eng Sci

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In this paper, a new approach is presented for designing a miniaturized microstrip patch antenna (MPA) for dual-band applications. The proposed MPA consists of a semi-circular patch radiator fed by a 50-Ω coplanar waveguide (CPW) structure with a tapered-ground plane for enhancing impedance bandwidth over the dual-band. By inserting a folded U-shaped slot into the semi-circular patch, the proposed antenna introduces an additional higher-order mode but does not modify the resonance frequency of the lower-order mode of the patch, yielding the desired dual-band response. For antenna miniaturization, the circular-shaped radiator of the reference antenna (RA) was converted into a semi-circular radiating patch. Agreement between CST and HFSS simulated results led us to manufacture a prototype of the designed antenna on one side of an inexpensive FR-4 substrate with an overall dimension of 17 × 18 × 0.8 mm<sup>3</sup>. The measured result in terms of reflection coefficient S11 confirms that the antenna operates in both 3.5 GHz (3.4–3.7 GHz) and 5.8 GHz (5.725–5.875 GHz) bands suitable for use in WiMAX and WLAN applications, respectively. Moreover, besides an area reduction of 32% compared with the RA counterpart, the proposed antenna has other features, a simple geometry, and is easy to manufacture in comparison with previously reported antenna structures.

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A 2.4 GHz Coplanar Solar Cell Patch Antenna with a Semi-Analytical Evaluation of Temperature Effects

Cambero

Silva

Paz

et al. 2022

J. Microw. Optoelectron. Electromagn. Appl.

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Solar cells integrated with antennas have aroused scientific interest as an attractive energy source alternative in low power devices for IoT and Wireless Sensor Network applications. Since the space for all components in the systems is scarce, different integration ideas have been proposed in this field. However, further analysis of the performance of photovoltaic modules used as structural components of antennas is still lacking. In this context, this work experimentally extracts the necessary parameters to create an equivalent circuit model of a modified solar cell used as a radiator of a 2.4 GHz coplanar patch antenna. The obtained model is then used in the numerical characterization of the Current-Voltage (I-V) curves under temperature variations. Antenna design and performance are described, and the physical modifications of a commercial solar cell used in the prototype are presented. The I-V curves were generated for temperatures ranging from 243 to 325 K. The obtained simulation results within this temperature range showed a 150 mV shift of the optimal operation point, decreasing in approximately 20 mW the supported power with the temperature rise. A predictive methodology is introduced to estimate the possible values for the fill factor, energy conversion efficiency, and current density in a modified solar cell under temperature variations, allowing a fully operational photovoltaic antenna design.

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Study of Patch Antennas with Koch Curve Form Slots

Cited by 3 publications

References 18 publications

Double Patch Antenna Array for Communication and Out-of-band RF Energy Harvesting

Double Patch Antenna Array for Communication and Out-of-band RF Energy Harvesting

Miniature Slotted Semi-Circular Dual-Band Antenna for WiMAX and WLAN Applications

A 2.4 GHz Coplanar Solar Cell Patch Antenna with a Semi-Analytical Evaluation of Temperature Effects

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