Recently, superresolution techniques for Direction of arrival (DOA) estimation, such as MUSIC (MUltiple SIgnal Classification) algorithm [1], have become indispensable. By the assumption of an ideal array antenna, following problems are caused in an actual measurement. Array elements often have gain and phase errors, and mutual coupling effects cannot be also ignored in general, which degrade p...

Wideband, wide-scan antenna arrays are a promising candidate for the future wireless networks and as well as an essential part of experimental radio astrophysics. Understanding the underline physics of the element performance in the array environment is paramount to develop and improve the performance of array systems. The focus of this thesis is to develop novel wideband antenna array technolo...