الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Recently, hyperthermia attracts more attention to produce a rise in temperature according
to power absorption inside a tumor volume There are different types of applicators that may be used to achieve this goal.
This thesis introduces two types of applicators to be used at microwave frequencies. The dipole radiation through a strati tied biological medilll11 is investigated. Also, an aperture with infinite metal flange is applied to radiate electromagnetic waves at different frequencies through a biological medium. This is discussed using Hertz vectors through multilayered media. It is found that aperture antenna can be used more successtldly than dipole antenna.
Internal field of a body with a homogeneous material and closed surface due to applying aperture on its surface is calculated using double integral around this surface. This is used to get the power deposited inside a model of a cylindrical muscle at multifrequencies to study their effect on focusing.
It is known that phased array can be used to focus the transmitted waves inside a certain location. Therefore, in this thesis, an aperture phased array may be used to focus the electromagnetic power inside a cylindrical biological model composed of fat and muscle layers using the equivalence principle. This principle is used to determine the field inside a multilayered cylindrical model. In addition, the peak value of the power absorption due to the aperture phase array can be controlled by adjusting the phase and amplitude of the excitation of each aperture.