Characterization of dual band 900MHz and 1800MHz antenna in the presence of human hand

2016 International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications (ICRAMET) Pub Date : 2016-10-01 DOI:10.1109/ICRAMET.2016.7849590

D. Subramaniam, M. Jusoh, T. Sabapathy, M. Jais, A. A. Al-Hadi

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Abstract

A dual band planar inverted F antenna (PIFA) is designed and the performance is analyzed with the presence of mobile phone casing and the presence of human hand The proposed antenna has three main elements, the ground plane, radiating patch and a shorting plate. The PIFA is fabricated on FR4 substrate with dielectric constant of 4.5. The proposed antenna dimension is optimized to achieve a compact dimension of 100(L) × 40(W) × 0.035(H) mm. The antenna operates in 900MHz for lower band and 1800MHz in higher band with reflection coefficient of less than −10dB. The proposed antenna is fed by 50Ω coaxial probe feeding. The antenna is measured using realistic casing to analyze the performance of the antenna. The impedance and reflection coefficient of the antenna with the presence of mobile casing and human hand are investigated. The investigation revealed that the results is stable at lower frequency band, 900 MHz. However, the resonant frequency is slightly shifted at higher frequency band, 1800 MHz when it is measured with mobile phone casing.

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人手存在下900MHz和1800MHz双频段天线的特性

设计了一种双频平面倒F天线(PIFA)，并在手机机壳存在和人手存在的情况下对其性能进行了分析。该天线由接地面、辐射贴片和短板三部分组成。在介电常数为4.5的FR4衬底上制备了PIFA。天线尺寸经过优化，达到100(L) × 40(W) × 0.035(H) mm的紧凑尺寸，下频段工作频率为900MHz，上频段工作频率为1800MHz，反射系数小于−10dB。该天线采用50Ω同轴探针馈电方式。采用真实机匣对天线进行了测量，分析了天线的性能。研究了移动机壳和人手存在时天线的阻抗和反射系数。调查结果表明，在较低的频段(900 MHz)，结果是稳定的。但在更高频段，用手机外壳测量时，谐振频率略有偏移，为1800 MHz。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2016 International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications (ICRAMET)

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