Wyniki wyszukiwania - BazTech

1

Dual-band Textile AMC Antenna for WLAN/WBAN Applications on the Human Arm

Bouamra Wahida, Sfar Imen, Mersani Ameni, Osman Lotfi, Ribero Jean-Marc

International Journal of Electronics and Telecommunications

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2022

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Vol. 68, No. 2

209--216

EN

This article presents a low-profile and flexible dualband AMC Antenna operating at 2.45/ 5.8 GHz for wireless local area network (WLAN) on-body antenna applications using textile materials. A dual-band artificial magnetic conductor (AMC) structure with a dual hexagonal shape was used to reduce back radiation, therefore specific absorption rate (SAR), and improve the antenna performance parameters. To study the antenna/body interaction, a suitable comprehension and detailed studies of the wave propagation in the vicinity of the human arm in different meteorological conditions were carried out to demonstrate the effects of the skin condition on the antenna performance parameters. The simulation and measurement results indicate that electromagnetic communication on wet skin is viable. Acceptable SAR values were obtained, revealing that the body is well immune from the antenna electromagnetic radiation in functional wearable conditions. The proposed wearable AMC antenna provided engaging simulation and measurement results. It satisfies users' comfort and safety properties, making it a good candidate for WLAN/WBAN applications.

2

A novel type of wearable dual-band antenna based on coplanar waveguide feeding for wearable wireless communications

He Zhengrui, Jin Jie

Optica Applicata

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2021

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Vol. 51, nr 2

159--170

EN

A flexible and compact coplanar waveguide feed (CPW-fed) wearable antenna is introduced for wireless wearable communications applications at the industrial scientific medical (ISM) band. The proposed antenna consists of copper, which is used as the radiation patch and ground planes printed on the same side of polyimide flexible substrate. The overall size of the antenna is 30 mm × 28 mm × 0.08 mm, the results show that the antenna can transmit and receive signals in two frequency bands of 1.89–2.67 GHz and 3.02–3.23 GHz, in which radiating properties are characterized and agree well with the simulation results. The antenna is bent in different directions to further investigate the reflection coefficient and corresponding effect on the antenna under bending. The center frequency of the antenna is slightly shifted towards higher and lower frequencies when antenna is bent in X-axis and Y-axis, respectively. Furthermore, the wearability of the antenna is verified when the antenna is placed on different parts of the human body such as wrist and chest. Hence, the proposed flexible antenna is a suitable candidate for wearable wireless communication applications.

3

Gain Improvement of dual-band circular monopole antenna for 2.45/5.5 GHz WLAN applications

Lamultree Suthasinee, Jansri Chalee, Phongcharoenpanich Chuwong

Przegląd Elektrotechniczny

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2019

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R. 95, nr 5

157--160

EN

This paper presents a gain improvement of dual-band antenna for 2.45/5.5 GHz WLAN applications. The radiating element of the proposed antenna consists of a circular disc monopole with circular-slot laid on FR-4 substrate and backed by a partial ground plane. This partial ground plane is modified to improve its radiation performance. This proposed antenna operates over the frequencies of 2.4-2.485 GHz and 5.15- 5.825 GHz with nice radiation characteristics and magnitude of S11 better than -10 dB. An EM simulator has been used in the design and simulation. In addition, an experimental validation was set and measured to compare with the simulated results. All numerical results will be reported and discussed in the paper.

PL

W artykule opisano dwupasmową antenę do pasma2.45/5.5 GHz I sici WLAN. Antena składa się z okrągłego dysku i okrągłej szczeliny. Częściowo uziemione podłpoże poprawia właściuwości radiacyjne.

4

A Dual-band Circularly-polarized Printed Monopole Antenna for Wi-Fi and WiMAX Applications

Lwin Zaw Myo, Aye Thae Su

Journal of Telecommunications and Information Technology

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2019

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nr 4

50--54

EN

This paper presents a rectangular-shaped printed monopole antenna with circular polarization for Wi-Fi (2.4–2.484 GHz) and WiMAX (3.3-3.7 GHz) bands. The antenna relies on asymmetric arrangement of the patch with respect to the microstrip feed, in order to generate circular polarization. Dual-band (Wi-Fi and WiMAX) operation is enabled by inserting a slit in the corner of the ground plane. Simulation results show a bandwidth increase of 15.9% (2.2–2.58 GHz) for Wi-Fi, and of 24.16% (3.13–3.99 GHz) for WiMAX applications. Furthermore, beamwidths at the axial ratio of 3 dB equal 48˚ and 51˚ for the x-z plane and y-z planes, respectively.

5

Projekt planarnej anteny dwuzekresowej 1800/2600 MHz

Bugaj J., Wnuk M., Łata K.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2017

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nr 8-9

1103--1106, CD

PL

W artykule przedstawiono model dwuzakresowej anteny planarnej pracujące w zakresie 1,8 GHz oraz 2,6 GHz. Antena obsługuje pasmo częstotliwości 1,71 - 1,91 GHz dla technologii GSM1800, GSM1900 oraz 2,46 - 3,28 GHz dla technologii LTE2500, LTE2600 z izolacją odpowiednio powyżej 25 dB i 30 dB. Antena zastała zaprojektowana w środowisku wirtualnym za pomocą programu CST Studio Suite. Po optymalizacji oraz uzyskaniu odpowiednich parametrów antena została wykonana praktycznie oraz przebadana w Laboratorium Kompatybilności Elektromagnetycznej. Antena została zaprojektowana na podłożu FR-4 o rozmiarze 20x50 mm, grubości 1,5 mm i względnej przenikalności dielektrycznej 4,6.

EN

This paper presents dual-band planar antenna operating in the 1,8 GHz and 2,6 GHz band. It supports 1,71 - 1,91 GHz for GSM1800, GSM1900 and 2,46 – 3.28 GHz for LTE2500, LTE2600 with isolation more than 25 dB and 30dB, respectively. The antenna has been designedon FR-4 substrate with size 20x50 mm to fit the mobile casing. CST simulation was utilized in the design stage. The antenna was constructed on a substrate FR-4, with the thickness 1,5 mm and relative permittivity of 4,6.

6

A low-profile dual-band antenna for a wireless LAN acces point

Bialkowski K., Zagriatski S., Postula A., Bialkowski M.

Kwartalnik Elektroniki i Telekomunikacji

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2004

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Vol. 50, z. 4

617-628

EN

The design of dual-band 2.45/5.2 GHz antenna for an acces point of a Wireless Local Area Network (WLAN) is presented. The proposed antenna is formed by a Radial Line Slot Array (RLSA) operating at 2.4 GHz and a microstrip patch working at 5.2 GHz, both featuring circular polarization. The design of this antenna system is accomplished using commercially available Finite Element software. High Frequency Structure Simulator (HFSS) of Ansoft and an in-house developed iteration procedure. The performance of the designed antenna is assessed in terms of return loss (RL), radiation pattern and polarization purity in the two frequency bands.