In this communication, we present a new optimization and realization of a quadruple-ridge
flared horn (QRFH) as a feed for reflector antennas of the square kilometer array (SKA) …

In this article, an omnidirectional dual-polarized antenna with synergetic electromagnetic
and aerodynamic properties is propounded for high-speed diversity systems. The …

We describe a new type of ultrawideband feed antenna based on nested coaxial
waveguides. The feed is for radio astronomy applications and covers two closely spaced …

Formulas for calculation of aperture efficiency of a primarily-focused parabolic reflector with
a rotationally symmetric feed, or so-called Body-of-Revolution (BOR) feed, can be found in …

A sinuous antenna, projected onto a pyramidal structure, is presented as a possible wide
band single pixel feed candidate for the Square Kilometre Array reflector system. Simulated …

The design of a 2.2 to 4.4 GHz coaxial waveguide feed antenna for radio telescopes is
described. An iris matching network is designed to improve the unmatched aperture …

Quadruple-ridge Flared Horns (QRFHs) have been showing qualified performance as the
feed antennas for the reflecting systems in the Square Kilometre Array (SKA). However, due …

Designing shaped offset Gregorian reflector systems to operate with several
interchangeable feed horns, over frequency bandwidths of more than a decade, with …

Several large radio astronomy projects, such as SKA, FAST and VLBI, are under
development in different phases towards their final goals. Among all future radio telescopes …

A new truly conical geometry of Eleven antenna for high frequency applications is proposed
in the paper. By using this geometry, the antenna petal arrays are made on only one piece of …