The Fourier iterative algorithm (FIA) is a wellknown planar phase retrieval method. The algorithm uses conventional amplitude measurements on two surfaces placed in different distances from the measured antenna. In this paper FIA will be applied in cylindrical geometry. In this case near-field transformations use high order Hankel functions which are known to become singular in case of measurem...

A new shaped circularly polarized dielectric resonator antenna (CP DRA) is studied with branch-line coupler and log-periodic balun for the GPS application. Since the coupler and balun are located under the DRA, it does not increase the footprint of the antenna, as a result the system is very compact. Two configurations are considered in this paper. In the first configuration, an external 50Ω lo...

A design study has been performed for a lightweight, cylindrical array antenna for a hostile-mortar-locating radar system. A mathematical model of the array was developed which permitted tradeoff studies to be made of various array parameters. Data computed using the model compared very well with experimental and other theoretical data. Critical components of the array were built and tested and...

This thesis presents design of dielectric resonator loaded antenna for wireless applications. The design is a Different shape Dielectric Resonator Antenna (DRA) using different material for wireless applications. Here the DRA is excited by conformal patch connected to co-axial feeding which is an effective feed mechanism and more efficient in energy coupling than other types of feeding techniqu...

A compact wideband antenna with cylindrical conformal geometry is proposed . The radiating element of this antenna consists of an Eshaped patch that assumes a conformal orientation relative to the cylindrical surface in order to yield maximum bandwidth. The antenna is fed by waveguide feeding connected to the radiating patch at the longer side Radiation properties of the proposed including far-...