The 110 m radio telescope (QTT), which is proposed to be built in Xinjiang Qitai, will be in
the list of world-leading large scale scientific facilities, becoming the world's largest fully …

A circular quadruple-ridged flared horn achieving almost-constant beamwidth over 6: 1
bandwidth is presented. This horn is the first demonstration of a wideband feed for radio …

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) …

The electrodynamics eigenmodes boundary problems' solutions for the eigenmodes of
coaxial quad-ridged waveguides are presented. These solutions have been obtained by …

We present a quad-ridge horn antenna as a feed for a reflector antenna for use in radio
astronomy applications. The antenna uses elliptically shaped sidewalls to limit the variation …

Introduction. The utilization of ridged structures in modern waveguide devises is dis-cussed.
The goals of the research presented in the paper are defined. TE modes. The geometrical …

The results of numerical investigation of sectoral coaxial ridged waveguides eigenmodes of
two configurations (with a ridge on inner or outer wall) for different cross-section dimensions …

The Eleven antenna is a log-periodic folded-dipole-pair array with two unique radiation
characteristics: a constant beamwidth and a fixed phase center location over a decade …

This letter proposes a new ridged horn antenna with adjustable metallic grid sidewalls and a
cross-shaped back cavity. An improved design of the coaxial-line-to-ridged-waveguide …

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 …