Wyniki wyszukiwania - BazTech

1

Electrical equivalent model of symmetrical split ring resonator sensor-based microwave technology

Alahnomi Rammah A., Zakaria Zahriladha, Mohd Yussof Zulkalnain, Alhegazi Ammar, Alsariera Hussein, Abd Rahman Norhanani

Przegląd Elektrotechniczny

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2020

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R. 96, nr 8

168--175

EN

In this paper, a microwave planar sensor based on symmetrical split ring resonator (SSRR) is investigated. This sensor uses ring resonator with slits at 0o and 180o angles as method to realize the harmonic resonant frequency response and then, it integrated with symmetrical split ring for suppressing the undesired harmonic spurious. Compact size, simplicity, cost effective, and ease of fabrication are the main advantage of SSRR sensor. The model of analytical equivalent circuit is proposed and the characteristic of band-pass and band-stop are derived and investigated for the analysed SSRR with/without spurliners filters. The performance and sensitivity of the SSRR sensor is high with an average accuracy between 96% to 98 % at narrow band frequencies. This type of resonators sensors can detect the material properties under their chemical or physical changes which is essential for numerous applications such as quality control, agriculture, bio-sensing, medicine and pharmacy, food industry, and material science.

PL

Przedstawiono mikrofalowy czujnik planarny bazujący na symetrycznych pierścieniowych rezonatorach. Wykorzystano pierścieniowy rezonator ze szczeliną przy kącie 0o i 180o w celu uzyskania odpowiedniej częstotliwości rezonansowej. Zaproponowano schemat zastępczy czujnika skąd obliczono pasmo częstotliwości. Czujnik może być wykorzystywany do badania materiałów.

2

Design and investigation on wideband antenna based on polydimethylsiloxane (PDMS) for medical imaging application

Li Nga Yan, Zakaria Zahriladha, Shairi Noor Azwan, Alsariera Hussein, Alahnomi Rammah

Przegląd Elektrotechniczny

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2020

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R. 96, nr 3

89--92

EN

This paper presents an antenna for the medical imaging application which can detect unusual tissues on any part of the body. A compact design of wideband antenna with wearable properties is proposed for the medical imaging application. The wideband antenna is designed with introducing notches to the patch and a t-shaped slot at the partial ground. Polydimethylsiloxane (PDMS) is introduced to the antenna for the implementation of the wearable antenna. The proposed antenna operated in a frequency range of 3GHz to 6GHz. The antenna that embedded with PDMS shows a good agreement to the antenna without PDMS. An experimental proposed structure shows a good agreement with the simulated results. The overall dimension of the antenna is 24mm(W) x 38mm( L) which consider is a miniature antenna. This proposed design give an alternative solution for the antenna which cannot be wear on the body and protect the antenna. The introduction of PDMS will reduce the signal reflection cause by the high coupling of the human body.

PL

W artykule opisano antenę umożliwiającą wykrywanie zmian w tkance w ciele człowieka. Antena została zaprojektowana do celw obrazowania medycznego. Antena pracuje w zakresie częstotliwości 3 – 6 GHz. Rozmiary anteny wynoszą 24 x 38 mm. Konstrukcja anteny umożlwia ciągła pracę w różnych warunkach i wykorzystuje polydimethylsiloxane PDMS.

3

Compact CPW-Fed broadband circularly polarized monopole antenna with inverted L-shaped strip and asymmetric ground plane

Alsariera Hussein, Zakaria Zahriladha, Isa A. A. M., Al-Heety Othman S., Zeain M. Y., Abu-Khadrah Ahmed I., Alahnomi R., Mabrok Mussa

Przegląd Elektrotechniczny

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2020

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R. 96, nr 4

53--56

EN

The design of a coplanar waveguide-fed (CPW-fed) broadband circularly polarized printed monopole antenna is proposed. The antenna consists of a simple rectangular radiator monopole, an inverted L-shaped strip, a horizontal stub, and a modified asymmetric ground plane. Simulation results indicate that the impedance bandwidth (IBW) is 121% (1.575–6.4 GHz), and the axial ratio bandwidth (ARBW) is 64.3% (2.85– 5.55 GHz). A parametric study is performed for verification. Results indicate that the proposed antenna is suitable for different wireless communications systems.

PL

Zaprezentowano projekt szerokopasmowej cyrkularnej jednobiegunowej anteny. Antena składa się z z prostokątnego radiatora, paska o odwróconym kształcie L I asymetrycznej płaszczyzny uziemionej. Symulacje wykazały dobrą pracę w paśmie 2.85 – 5.55 GHz. Wyniki symmulacji porównano z wynikami badania modelu.