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Abstract:
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The 20th century witnessed the extensive use of microwaves in industrial, scientific
and medical fields. The major hindrance to many developments in the ISM field is the lack
of knowledge about the effect of microwaves on materials used in various applications. The
study of the interaction of microwaves with materials demanded the knowledge of the
dielectric properties of these materials. However, the dielectric properties of many of these
materials are still unknown or less studied. This thesis is an effort to shed light into the
dielectric properties of some materials which are used in medical, scientific and industrial
fields. Microwave phantoms are those materials used in microwave simulation applications.
Effort has been taken to develop and characterize low cost, eco-friendly phantoms from
Biomaterials and Bioceramics. The interaction of microwaves with living tissues paved way
to the development of materials for electromagnetic shielding. Materials with good
conductivity/absorption properties could be used for EMI shielding applications.
Conducting polymer materials are developed and characterized in this context.
The materials which are developed and analyzed in this thesis are Biomaterials,
Bioceramics and Conducting polymers. The use of materials of biological origin in scientific
and medical applications provides an eco-friendly pathway. The microwave characterization
of the materials were done using cavity material perturbation method. Low cost and ecofriendly
biomaterial films were developed from Arrowroot and Chitosan. The developed
films could be used in applications such as microwave phantom material, capsule material in
pharmaceutical applications, trans-dermal patch material and eco-friendly Band-Aids.
Bioceramics with better bioresorption and biocompatibility were synthesized. Bioceramics
such as Hydroxyapatite, Beta tricalcium phosphate and Biphasic Calcium Phosphate were
studied. The prepared bioceramics could be used as phantom material representing
Collagen, Bone marrow, Human abdominal wall fat and Human chest fat. Conducting
polymers- based on Polyaniline, are developed and characterized. The developed materials
can be used in electromagnetic shielding applications such as in anechoic chambers,
transmission cables etc |