Title :
FDTD simulations and measurements on planar antennas for mobile phones
Author :
De Salles, Alvaro A A ; Ferndadez, C.R. ; Bonadiman, Mateus
Author_Institution :
Electr. Eng. Dept., Univ. Fed. do Rio Grande do Sul, Porto Alegre, Brazil
Abstract :
The design, simulation and measurements of a rectangular microstrip (or "patch") antenna at 1.9 GHz are summarized in this paper. The Voltage Standing Wave Ratio (VSWR) of this antenna and its bandwidth are simulated using the software Ansoft Ensemble™. Also, the horizontal plane radiation pattern and the Specific Absorption Rate (SAR) in the user\´s head, as well as the near and the far field are simulated using an algorithm based in the Finite Difference Time Domain (FDTD) method. Measurements of the VSWR and of the radiation patterns on the horizontal and vertical planes are also shown. It can be observed that this type of antennas can be an adequate alternative to improve the performance of mobile phones and to reduce the non ionizing energy absorbed in the user\´s head, reducing therefore health risks.
Keywords :
UHF antennas; antenna radiation patterns; biological effects of microwaves; cellular radio; finite difference time-domain analysis; microstrip antennas; mobile antennas; mobile handsets; FDTD simulation; biological effects; cellular phones; health risks; horizontal plane radiation pattern; horizontal planes; mobile phones; planar antenna; rectangular microstrip antenna; specific absorption rate; vertical planes; voltage standing wave ratio; Antenna measurements; Antenna radiation patterns; Bandwidth; Finite difference methods; Microstrip antennas; Mobile handsets; Planar arrays; Specific absorption rate; Time domain analysis; Voltage;
Conference_Titel :
Microwave and Optoelectronics Conference, 2003. IMOC 2003. Proceedings of the 2003 SBMO/IEEE MTT-S International
Print_ISBN :
0-7803-7824-5
DOI :
10.1109/IMOC.2003.1242866
