Results 91 to 100 of about 3,736 (226)
Broadband Lumped Mirror Array mmWave Antenna for Wireless and Defense Systems
Journal of Electrical and Computer Engineering, Volume 2025, Issue 1, 2025.This article introduces a novel lumped mirror array mmWave antenna designed for multiband microwave applications, including 5G, satellite communication, and defense systems. The antenna operates over a broad frequency range from 4.7 to 67.63 GHz, offering excellent impedance bandwidth of 70.4%. Developed on an FR‐4 substrate with dimensions of 160 × 70
Manish Varun Yadav +7 more
wiley +1 more source
Stretchable-Substrate-Impregnated Fabric: Deployable Reflectarray Antennas for CubeSats
IEEE AccessThis paper proposes a stretchable-substrate-impregnated fabric for deployable high-gain antenna for small satellites. Constellations of small satellites offer worldwide coverage of wireless communication and earth observation; high-gain antennas are ...
Masato Machida +3 more
doaj +1 more source
Cellular reflectarray antenna and method of making same [PDF]
, 2010 A method of manufacturing a cellular reflectarray antenna arranged in an m by n matrix of radiating elements for communication with a satellite includes steps of determining a delay .phi.m,n for each of said m by n matrix of elements of said cellular ...
Romanofsky, Robert R
core +2 more sources
IEEE Open Journal of Antennas and PropagationThis work presents a reflectarray-based base station antenna to integrate both backhaul (BH) and fronthaul (FH). The reflectarray operates at 28 GHz in dual linear polarization, using one polarization for the BH and another for the FH. The BH is a pencil
Alvaro F. Vaquero +3 more
doaj +1 more source
Millimeter Wave Beam Steering Reflectarray Antenna Based on Mechanical Rotation of Array
IEEE Access, 2019 This work provides design and analysis of a beam steering reflectarray antenna, designed at 26 GHz, based on the mechanical rotation of the array. Unit cells based on circular ring elements are designed, and scattering parameter measurements have been ...
Muhammad Inam Abbasi +5 more
doaj +1 more source
What is brand? Some insights in the historical development [PDF]
, 2018 The aim of this study is to enhance understanding in the philosophy of the brand along with its historical development around the world. Its main purpose is to clarify the nature of the brand, its origination, ancient phase, digital phase and the future ...
Ismail, Fadillah +3 more
core
Axially symmetric dual‐reflectarray antennas
Electronics Letters, 2014 An axially symmetric dual‐reflectarray antenna is proposed. A main reflectarray is designed to mimic a paraboloidal main reflector, and a sub‐reflectarray is designed to mimic a hyperboloidal or an ellipsoidal sub‐reflector. The dual‐reflectarray antenna is more compact than the conventional curved dual reflector.
Ji Hwan Yoon +3 more
openaire +1 more source
Bandwidth Behavior of Closely Spaced Aperture-Coupled Reflectarrays
International Journal of Antennas and Propagation, 2012 The bandwidth features of reflectarray antennas are analyzed by examining in detail the phase errors due to the compensation mechanism for spatial phase delays.
F. Venneri, S. Costanzo, G. Di Massa
doaj +1 more source
Recent Developments of Reflectarray Antennas for Reconfigurable Beams Using Surface-Mounted RF-MEMS [PDF]
, 2012 Some of the most recent developments in reconfigurable reflectarrays using surface-mounted RF-MEMS, which have been developed at the Universidad Politécnica de Madrid, are summarized in this paper.
Arrebola Baena, Manuel +3 more
core +3 more sources
Design, manufacture and measurement of a low-cost reflectarray for global earth coverage [PDF]
, 2016 In this work a low-cost reflectarray with isoflux pattern for global Earth coverage is designed, manufactured and measured at 30GHz. The isoflux template is mathematically derived for a generic satellite and then particularized for a geostationary orbit.
Arrebola Baena, Manuel +5 more
core +2 more sources