Laila, D; Dr.Mohanan, P(Cochin University of Science And Technology, October , 2012)
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Abstract:
Antennas, the key element in wireless communication devices had
undergone amazing developments especially in the direction of compactness
and safety aspects. In the last two decades, the use of the cellular phones has
become the most popular mode of communication across the globe. At the same
time, the concerns about the radiation effects have increased in the general
public. The main concern of this thesis is to develop a mobile antenna which
gives reduced RF interference to the user. The reduction of the power absorbed
by the user can tremendously avoid any possible health hazards.
The radiation characteristic of a monopole antenna is modified with good
radiation characteristics suitable for a mobile handset. The modification is
implemented by using different resonating structures which provides reduced
radiation along one direction. The direction of less radiation can be changed by
modifying the planar antenna structure to a ground folded antenna. This
modified structure with excellent radiation characteristic is suitable for modern
wireless handheld devices with less user RF interference. Specific Absorption
Rate (SAR) is an important parameter for mobile handset. The SAR is
estimated for the newly developed antenna for different conditions and
discussed in this thesis.
Description:
Department of Electronics, Cochin University of Science And Technology