The theory, design, fabrication, and measurement of a new class of planar ultrawideband
modular antenna (PUMA) arrays are presented. The proposed PUMA array class achieves …

Multibeam and beam-scanning capabilities of metasurface (MTS) antennas using multiple
feeds are investigated. The MTS synthesis is performed by direct inversion of an electric field …

A phased-array antenna is a device that generates radiation patterns whose shape and
direction can be electronically controlled by tailoring the amplitude and phase of the signals …

This paper describes digital radio astronomical receivers used for decameter and meter
wavelength observations. Since 1998, digital receivers performing on-the-fly dynamic …

An effective optimization method is proposed for the suppression of edge effects in finite
ultrawideband tightly coupled antenna arrays (TCAAs). By designing a practical finite …

Multibeam technology enables the use of two or more subbeams for joint communication
and radio sensing, to meet different requirements of beamwidth and pointing directions …

Large-aperture electromagnetic phased arrays can provide directionally controlled radiation
signals for use in applications such as communications, imaging and power delivery …

This article presents embedded element design and measurement data for an
ultrawideband (UWB) flared-notch (Vivaldi) array. The US Naval Research Laboratory (NRL) …

This article presents a dual-polarized metal-flare sliced notch antenna (SNA) array
comprising metallic Vivaldi flares “sliced” by air gaps. Aside from the slice gaps in the flares …

Abstract A new 1.4 GHz, 19-element, dual-polarization, cryogenic phased-array feed (PAF)
radio astronomy receiver has been developed for the Robert C. Byrd Green Bank Telescope …