Summary
International Symposium on Antennas and Propagation
2008
Session Number:4C34
Session:
Number:4C34-1
Small Internal Antennas for Cell-Phones Application
Sheng-Yi Huang, Shih-Ying Sun, Jwo-Shiun Sun,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
Small antennas are more widely used in wireless communication systems than before. The characteristics of small antennas like gain, efficiency, impedance bandwidth, and radiation patterns have been studied for application in real phones [1]. The embedded antennas are widely made due to such characteristics as low-profile, low-price, low Specific Absorption Rate (SAR), and easier fabrication [2-5]. However, nowadays still there is no any research organization in the world that can propose statistics proving cancer attributed to human body tissue exposed to Electromagnetic (EM) energy. But surely, EM radiation energy will cause the biological effects and pathological changes on the human organizations [6-7]. The presented antennas are designed in Universal Mobile Telecommunication System (UMTS) of 1920 - 2170 MHz and Digital Video Broadcast?Handheld (DVB-H+ ) of 1452 - 1492 MHz. The resonant frequency of UMTS is made by using a Planar Inverted-F Antenna (PIFA) element; the other resonant frequency of DVB-H+ is made by using meander-line configurations. The total volume of the antennas is greatly reduced by 65 % compared to generally internal radiators. The ratios of impedance bandwidth of the antennas related to the central frequencies 1.5 and 2.1 GHz are 20 % and 18 %, respectively. The good characteristics of the antenna such as omni-directional far-field radiation patterns are attainable. The experimental results show fairly good agreement with the numerical data by High Frequency Structure Simulator (HFSS).