This thesis presents the development of a hat-fed refector antenna with radome to be used
as satellite earth station. The antenna with self supported feed is relatively compact, circular …

We present three methods for producing lightweight waveguide-and antenna components
by autocatalytic electroless copper plating on plastics. Waveguides for the Ku-band are …

In order to meet the requirements of the new generation of radio telescopes, we have
developed a new topology called DYQSA, which stands for DYson Quad-Spiral Array. The …

Dielectric resonator antennas have been demonstrated to be an efficient radiator, especially
with the possibility of fabricating it at low cost based on 3-D printing technologies. However …

In this paper, a systematic design technique for quadruple-ridged flared horn antennas is
presented, to enhance the radiation properties through the profiling of the ridge taper. The …

We present the design, manufacture, and measured performance of a dielectrically loaded
quad-ridge flared horn (QRFH) feed for decade bandwidth radio astronomy application. The …

Ultrawideband (UWB) technology has many advantages compared to its narrowband
counterpart in many applications. We present a new compact low‐cost UWB radar for indoor …

A quadraxial feed, excited by two orthogonal differential modes, is proposed for ultra
wideband quadruple-ridged flared horn (QRFH) antennas that obviates the need for a balun …

Future ultra-wideband (UWB) radio telescopes require UWB feeds for reflector antennas,
and many new UWB feed technologies have gained substantial progress to satisfy the tough …

A dual-linearly polarized travelling-wave array antenna design at Ku-band composed by a
novel single element named as triple plus slot is presented. It is formed by a plus slot with an …