On the Synthesis of Sub-Arrayed Planar Array Antennas for Tracking Radar Applications

Synthesis of Monopulse Sub-arrayed Linear and Planar Array Antennas with Optimized Sidelobes

In this paper, three approaches for the synthesis of the optimal compromise between sum and difference patterns for subarrayed linear and planar arrays are presented. The synthesis problem is formulated as the definition of the sub-array configuration and the corresponding sub-array weights to minimize the maximum level of the sidelobes of the compromise difference pattern. In the first approac...

Sidelobe Reduction through Element Phase Control in Sub-arrayed Array Antennas

When dealing with the synthesis sub-arrayed array antennas, the phase control, necessary for beam steering purposes, can be also exploited to reduce the undesired secondary lobes caused by the periodic spatial distribution of the amplitude excitations on the aperture when contiguous and identical sub-arrays are used. In order to determine the phase values of the array elements for a fixed sub-a...

Complementary Periodic Structures for Miniaturization of Planar Antennas

In this paper various layered planar periodic structures which provide miniaturization of planar antennas are proposed and discussed. The proposed designs are based on two concepts, reactive impedance surfaces and complementary periodic structures. In the proposed structures, complementary periodic rings and slots are patterned on the intermediate boundaries of the dielectric layers. A patch an...

Synthesis of Sub-arrayed Monopulse Planar Arrays by Means of an Innovative Excitation Matching Method

A Comprehensive Study of Resistor-Loaded Planar Dipole Antennas for Ground Penetrating Radar Applications

iii Abstract Ground penetrating radar (GPR) systems are increasingly being used for the detection and location of buried objects within the upper regions of the earth’s surface. The antenna is the most critical component of such a system. This thesis presents a comprehensive study of resistor-loaded planar dipole antennas for GPR applications using both theory and experiments. The theoretical a...