Design and Evaluation of a Flexible Dual-Band Meander Line Monopole Antenna for On- and Off-Body Healthcare Applications
| Autor: | Soeung Socheatra, Muhammad Imran, Cheab Sovuthy, Tale Saeidi, Shahid M. Ali, Zulfiqur Ali, Sima Noghanian, Qammer H. Abbasi |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Coupling
Physics on- and off-body communications Mechanical Engineering Acoustics 020208 electrical & electronic engineering Impedance matching 020206 networking & telecommunications 02 engineering and technology Article Planar Control and Systems Engineering TJ1-1570 0202 electrical engineering electronic engineering information engineering Mechanical engineering and machinery Multi-band device Electrical and Electronic Engineering Antenna (radio) WBAN Omnidirectional antenna Monopole antenna wearable antenna Ground plane SAR |
| Zdroj: | Micromachines Volume 12 Issue 5 Micromachines, Vol 12, Iss 475, p 475 (2021) |
| ISSN: | 2072-666X |
| Popis: | The human body is an extremely challenging environment for wearable antennas due to the complex antenna-body coupling effects. In this article, a compact flexible dual-band planar meander line monopole antenna (MMA) with a truncated ground plane made of multiple layers of standard off-the-shelf materials is evaluated to validate its performance when worn by different subjects to help the designers who are shaping future complex on-/off-body wireless devices. The antenna was fabricated, and the measured results agreed well with those from the simulations. As a reference, in free-space, the antenna provided omnidirectional radiation patterns (ORP), with a wide impedance bandwidth of 1282.4 (450.5) MHz with a maximum gain of 3.03 dBi (4.85 dBi) in the lower (upper) bands. The impedance bandwidth could reach up to 688.9 MHz (500.9 MHz) and 1261.7 MHz (524.2 MHz) with the gain of 3.80 dBi (4.67 dBi) and 3.00 dBi (4.55 dBi), respectively, on the human chest and arm. The stability in results shows that this flexible antenna is sufficiently robust against the variations introduced by the human body. A maximum measured shift of 0.5 and 100 MHz in the wide impedance matching and resonance frequency was observed in both bands, respectively, while an optimal gap between the antenna and human body was maintained. This stability of the working frequency provides robustness against various conditions including bending, movement, and relatively large fabrication tolerances. |
| Databáze: | OpenAIRE |
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