Ultra-high angular resolution in astronomy has always been an important vehicle for making
fundamental discoveries. Recent results in direct imaging of the vicinity of the supermassive …

Radio astronomy is a subfield of astronomy that explores the universe via radio signals up to
a few terahertz. Since the first detection of radio signals from the Milky Way by Karl G. Jansky …

Context. The Atacama Large Millimeter/submillimeter Array (ALMA) has been in operation
since 2011, but it has not yet been populated with the full suite of its planned frequency …

To the best of the author's knowledge, several studies during 1960–2019 were carried out
on wideband and ultrawideband LNAs just to render optimum LNAs for SAW‐less Radio …

This letter presents a 67–116-GHz low-noise amplifier (LNA) module with state-of-the-art
cryogenic noise performance. The LNA is based on a monolithic microwave integrated …

It is expected that the operation of microwave kinetic inductance travelling wave parametric
amplifiers (KITWPAs) can be extended to the millimetre (mm) and the sub-mm wavelength …

This article presents a-band integrated transceiver (T/R) single chip based on gallium nitride
(GaN) high electron mobility transistor (HEMT) technology for active electronically scanned …

The fundamental limits of the microwave noise performance of high electron-mobility
transistors (HEMTs) are of scientific and practical interest for applications in radio astronomy …

The article is concerned with the experimental evidence that proves technical feasibility of
the hybrid planar integration (HPI) scheme that has been proposed to construct …

A high-performance low-loss high-reflection-loss compact double-ridged waveguide
orthomode transducer (OMT) for the 67–116 GHz band has been designed, fabricated, and …