scholarly journals Realization of High Impedance Surface Characteristics Using a Periodically Transformed Artificial Magnetic Conductor Structure and Reduction Technique of Specific Absorption Rate

2013 ◽  
Vol 13 (2) ◽  
pp. 113-119 ◽  
Author(s):  
Seungwoo Lee ◽  
Seung-Yeop Rhee ◽  
Pan-Yeol Kim ◽  
Nam Kim
Keyword(s):  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Surface Characteristics ◽  
Reduction Technique ◽  
Magnetic Conductor ◽  
Impédance Surface ◽  
Specific Absorption ◽  
Artificial Magnetic Conductor ◽  
High Impedance ◽  
High Impedance Surface

scholarly journals PERANCANGAN DAN FABRIKASI PENYERAP GELOMBANG ELEKTROMAGNETIK PATCH SEGI ENAM BERBASIS SURFACE TEXTURED

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Levy Olivia Nur ◽  
Achmad Munir ◽  
Sugihartono Sugihartono ◽  
Adit Kurniawan
Keyword(s):  
Magnetic Conductor ◽  
Impédance Surface ◽  
Impedance Surface ◽  
Artificial Magnetic Conductor ◽  
High Impedance ◽  
High Impedance Surface

Teknologi surface textured yang merupakan salah satu teknik untuk pengembangan penyerap gelombang elektromagnetik telah mengalami perkembangan yang cukup pesat dalam dekade terakhir ini. Pada aplikasi penyerap, teknologi ini mampu mengurangi ketebalan material sehingga memungkinkan realisasi material yang lebih tipis. Secara prinsip, teknik ini menggunakan lapisan AMC (artificial magnetic conductor) yang mempunyai high impedance surface. Untuk mendapatkan tingkat penyerapan yang tinggi yang dapat bekerja pada frekuensi penyerapan yang diinginkan, metal patch dari penyerap tersebut dibuat dengan bentuk tertentu. Pada penelitian ini, dilakukan investigasi bentuk patch segi enam sama sisi yang dicetak di atas substrat dielektrik FR4 Epoxy dengan ketebalan 3,2 mm. Ukuran substrat dielektrik sel satuan yang didapatkan untuk bentuk segi enam 30 mm � 26,5 mm, sedangkan lebar sisi patch yang diperoleh 14 mm. Selanjutnya untuk mendapatkan tingkat penyerapan yang baik dilakukan penambahan elemen resistif pada patch. Nilai resistor yang perlu ditambahkan pada patch saat perancangan adalah 514 : dengan tingkat penyerapan pada frekuensi kerjanya sebesar 47 dB. Pengukuran telah dilakukan dengan menggunakan alat bantu PPW simulator. Kemudian dilakukan proses pemisahan karakteristik penyerap dari alat pengukurannya. Penambahan resistor sebesar 487 : memberikan pengaruh karakteristik penyerapan hingga 34 dB lebih baik sekitar 7 dB pada frekuensi resonansi 2,78 GHz bila dibandingkan dengan pengukuran tanpa R. Kata Kunci: AMC, penyerap, karakterisasi, patch, surface textured, sel satuan

Novel monopole antenna on a single AMC cell for low SAR

2020 ◽  
Vol 12 (9) ◽  
pp. 825-830
Author(s):  
G. Bulla ◽  
A. A. de Salles ◽  
C. Fernández-Rodríguez
Keyword(s):  
Health Risks ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Mobile Terminal ◽  
Monopole Antenna ◽  
Radiation Efficiency ◽  
Magnetic Conductor ◽  
Specific Absorption ◽  
Artificial Magnetic Conductor

AbstractThe design, simulations, and optimized results for a novel low specific absorption rate (SAR) monopole antenna on a single artificial magnetic conductor (AMC) cell are described in this paper. Simulated results show a reduction close to 70% in the 1 g ps SAR for the developed monopole antenna with the AMC in comparison to the monopole antenna without AMC. This allows higher radiation efficiency, battery drain reduction as well as mobile terminal user health risks reduction.

scholarly journals Textile Diamond Dipole and Artificial Magnetic Conductor Performance under Bending, Wetness and Specific Absorption Rate Measurements

2015 ◽  
Vol 24 (3) ◽  
pp. 729-738 ◽  
Author(s):  
K. Kamardin ◽  
M. K. A. Rahim ◽  
P. S. Hall ◽  
N. A. Samsuri ◽  
M. E. Jalil ◽  
...  
Keyword(s):  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Magnetic Conductor ◽  
Specific Absorption ◽  
Artificial Magnetic Conductor

Application of Auxiliary Antenna Elements for SAR Reduction in the Human Head

2014 ◽  
Vol 974 ◽  
pp. 288-292 ◽  
Author(s):  
M.I. Hossain ◽  
Rashed Iqbal Faruque Mohammad ◽  
M.T. Islam ◽  
N.H.M. Hanafi
Keyword(s):  
Mobile Phone ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Cellular Phone ◽  
Human Head ◽  
Reduction Technique ◽  
Health Hazards ◽  
Bandwidth Efficiency ◽  
Specific Absorption ◽  
Reduction Methods

The aim of this paper is to review various techniques smeared in the last decade for the elevation of low Specific Absorption Rate (SAR) of cellular phone using auxiliary antenna elements. Considering health hazards of EM radiation from mobile phone, it is discernible that a mobile phone antenna must have low SAR characteristics which can be achieved by imposing SAR reduction methods. There are some abridgments for every reduction technique which restrain the extensive use of available mobile phone considering bandwidth, efficiency, size, cost and easy implementation. Among all of SAR reduction methods metamaterial technique may be more satisfying considering all aspects. Along with, we can consider SAR affecting parameters and make optimization for better response.

A compact flexible textile artificial magnetic conductor-based wearable monopole antenna for low specific absorption rate wrist applications

2020 ◽  
pp. 1-7 ◽  
Author(s):  
Mohamed El Atrash ◽  
Mahmoud A. Abdalla ◽  
Hadia M. Elhennawy
Keyword(s):  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Integrated Design ◽  
Monopole Antenna ◽  
Human Hand ◽  
Total Efficiency ◽  
Magnetic Conductor ◽  
Specific Absorption ◽  
Hand Model ◽  
Human Hand Model

Abstract A compact monopole antenna backed with a 1 × 2 textile-based artificial magnetic conductor (AMC) array is proposed. Textile was mainly selected for the AMC materials according to an investigation that took place between different AMC substrate materials, where it was settled that the textile one displayed the highest antenna gain and efficiency. The monopole antenna and the AMC, distanced apart by 5 mm, combined form the integrated design. It operates at 2.4 GHz, which was particularly selected as the resonant frequency for wirelessly sending the subject's symptoms data via Wi-Fi, with realized gain and total efficiency of 6.76 dBi and 88.4%, respectively, in free space. Separated by 3 mm from the specific anthropomorphic mannequin human hand model, it displays a realized gain and total efficiency of 4.06 dBi and 44.39%, respectively, in a flat condition. Furthermore, it exhibits a specific absorption rate (SAR) of 1.8 W/kg averaged over 10 g of tissue. When bent over the human hand model, it performs well and exhibits a maximum SAR of 0.521 and 0.406 W/kg, averaged over 1 and 10 g of tissues, respectively. As a result of such outcomes, the proposed integrated design can be nominated for wearable hand/wrist and Wi-Fi applications.

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