Abstract :
Radio telescopes are transitioning to a new generation of faster and more sensitive instruments, and technology demonstrators for projects such as the multi-billion dollar Square Kilometer Array (SKA) are undergoing rapid development internationally. These efforts have focused attention on research issues associated with novel antenna technologies for radio astronomy. The intention of the Special Issue is to describe some of the recent developments from these major worldwide radio astronomy instrumentation efforts with an emphasis on the antenna and radio frequency technologies.
