Hyperthermia treatment is used to treat the tumors. The objective of this treatment is to

raise the temperature in tumor up to such a therapeutic level that the cell death occurs.

The challenge in this specific treatment is how to make it possible to achieve the

temperature increase in deeply seated tumors, while protecting the nearby healthy tissues

from unnecessary heating. Because of this issue, limitations are put on the treatment for

tumor patients. To meet with the above stated challenge, a new ultra wide band antenna

array is presented.

The aim of this thesis is to design an ultra-wide band antenna array that consists of single

multilayered staked patch antennas working in the frequency range from 400MHz-1GHz.

In order to increase the bandwidth a stacked patch antenna is designed and optimized by

implementing various methods such as washer feeding, layered structures, using shorting

pins, multilayered substrates and

 -slot etching. These parameters have been optimized

in order to find the optimal results to ensure good matching and reduced size of antenna.

Along with design, the availability of components in open market with respect to cost and

ease of access has also been taken into consideration during design process.

In final part of this thesis, single antennas have been arranged in annular array placed in

matching liquid between antennas and phantom to measure SAR distribution and level of

hot spots on the surface of phantom.

Furthermore, single stacked patch antenna has been investigated and compared with

initially designed U-slot etched stacked patch antenna [17]. Also the comparison for

arrays has been described with respect to matching, coupling and level of hot spots on

surface of phantom

Keywords:

Hyperthermia, water bolus, phantom, patch antenna, annular array, SAR