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Novel Wearable Antennas for Wireless Communication Systems
Published in Albert Sabban, Novel Wearable Antennas for Communication and Medical Systems, 2017
The use of microstrip antennas is well known in mobile telephony handsets [30]. The PIFA (planar inverted F antenna) configuration is popular in mobile communication systems. The advantages of PIFAs are their low profile, their low fabrication costs < and easy integration within the system structure. One of the miniaturization techniques used in this antenna system is based on space-filling curves. In some particular cases of antenna configuration, the antenna shape may be described as a multi-level structure. The multilevel technique has been already proposed to reduce the physical dimensions of microstrip antennas. The present integrated multi-service antenna system for communication systems is comprised of the following parts and features.
Analysis of Electromagnetic Absorption in Human Head by Wireless Devices
Published in Purna Chandra Mishra, Muhamad Mat Noor, Anh Tuan Hoang, Advances in Mechanical and Industrial Engineering, 2022
Total Radiated Power emitted by the mobile phone is comparatively minimum if the frequency is less. The frequency of the tested mobile phone is 880.2 MHz and 897.4 MHz and the TPR value is 26.57 dBm and 26.99 dBm respectively. From the test report it is clear that the 3D view of antenna radiation pattern shows that the radiation emitted by the branded mobile phone is comparatively less than the radiation emitted by the unbranded mobile phone. For inverted F Antenna the resonant frequency is decreased and input resistance at resonance is reduced as the inductance is increased. With a reduction in input resistance the impedance match to a 50 Ω system is improved. Notice also that the bandwidth is reduced as the resonant frequency decreases.
Wearable Compact Fractal Antennas for 5G and Medical Systems
Published in Albert Sabban, Wearable Systems and Antennas Technologies for 5G, IOT and Medical Systems, 2020
The use of microstrip antennas is well known in mobile telephony handsets [22]. The planar inverted-F antenna (PIFA) configuration is popular in mobile communication systems. The advantages of PIFAs are their low profile, their low fabrication costs and an easy integration within the system structure. One of the miniaturization techniques used in this antenna system is based on SFCs. In some specific cases of antenna configuration systems, the antenna shape may be described as a multilevel structure. A multilevel technique has already been proposed to reduce the physical dimensions of microstrip antennas. The presented integrated multiservice antenna system for a communication system comprises the following parts and features.
A Novel Design of Epidermal Flexible Antenna on Supraorbital Nerve to Correlate Diabetes and Anemia
Published in IETE Journal of Research, 2023
Kannagi V, A Jawahar, Vijay Nath
A planar inverted-F antenna (PIFA) is widely utilized in communications. A PIFA for the chemical sensing of ion concentration has been presented. When there is an increase in the ion concentration, the reflection coefficient of PIFA decreases considerably. The PIFA sensor exhibits a linear detection range from 0.15 to 15 μM [13]. The application of advanced carbon nano-materials for flexible antenna sensors has gained much interest because of their excellent electromechanical properties. However, carbon nanomaterial based composites must overcome problems such as toughness and low conductivity. A flexible multi-layer graphene film with a high conductivity of 106 S/m has been analyzed for use in antenna-based wearable sensors [14].