Title :
Chassis influence on the input impedance and SAR characteristics of handset antennas
Author :
Weiping Dou ; Chia, M.Y.W.
Author_Institution :
Centre for Wireless Commun., Singapore, Singapore
Abstract :
The paper investigates the chassis influence on the interaction between the handset antenna and the human model. The free space input impedance of the antenna varies with different chassis size. Simulated results show that the human model with no hands is inductively coupled to the antenna, and the impedance matching is still good in the presence of the human model assuming that the source impedance matches the free space input impedance. The results also show that the specific absorption rate (SAR), another important performance for handsets, can be optimised by properly choosing the chassis size. In addition, the chassis influence on the antenna efficiency is also presented.
Keywords :
biological effects of radiation; biological tissues; electric impedance; electromagnetic coupling; electromagnetic induction; electromagnetic wave absorption; health hazards; impedance matching; mobile antennas; telephone sets; FDTD calculations; SAR characteristics; antenna efficiency; biological effects; chassis influence; chassis size; free space input impedance; handset antennas; human model; impedance matching; inductive coupling; input impedance; simulated results; source impedance; specific absorption rate; tissue; Brain modeling; Finite difference methods; Humans; Immune system; Impedance matching; Shape; Specific absorption rate; Telephone sets; Time domain analysis; Wireless communication;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2001. IEEE
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-7070-8
DOI :
10.1109/APS.2001.960033
