Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Assimonis, Stylianos D."'
In this study, we investigate and fabricate a superdirective antenna array composed of strip dipole elements operating at a frequency of 3.5 GHz. The spacing, dimensions, and phase difference of the elements are optimized to achieve a super realized
Externí odkaz:
http://arxiv.org/abs/2309.09889
Dense arrays can facilitate the integration of multiple antennas into finite volumes. In addition to the compact size, sub-wavelength spacing enables superdirectivity for endfire operation, a phenomenon that has been mainly studied for isotropic and
Externí odkaz:
http://arxiv.org/abs/2208.01422
Terahertz (THz) communication is widely deemed the next frontier of wireless networks owing to the abundant spectrum resources in the THz band. Whilst THz signals suffer from severe propagation losses, a massive antenna array can be deployed at the b
Externí odkaz:
http://arxiv.org/abs/2207.00697
A new metamaterial based, circular polarized electromagnetic energy harvester is presented in this work. The structure, which is multilayer and utilises the well-known to the literature geometry of the spiral split ring resonator, operates at the Wi-
Externí odkaz:
http://arxiv.org/abs/2204.08003
Autor:
Dovelos, Konstantinos, Assimonis, Stylianos D., Ngo, Hien Quoc, Bellalta, Boris, Matthaiou, Michail
In this paper, we study the performance of wideband terahertz (THz) communications assisted by an intelligent reflecting surface (IRS). Specifically, we first introduce a generalized channel model that is suitable for electrically large THz IRSs oper
Externí odkaz:
http://arxiv.org/abs/2110.15768
Autor:
Dovelos, Konstantinos, Assimonis, Stylianos D., Ngo, Hien Quoc, Bellalta, Boris, Matthaiou, Michail
Intelligent reflecting surface (IRS)-assisted wireless communication is widely deemed a key technology for 6G systems. The main challenge in deploying an IRS-aided terahertz (THz) link, though, is the severe propagation losses at high frequency bands
Externí odkaz:
http://arxiv.org/abs/2108.08104
Autor:
Dovelos, Konstantinos, Assimonis, Stylianos D., Ngo, Hien Quoc, Bellalta, Boris, Matthaiou, Michail
An intelligent reflecting surface (IRS) at terahertz (THz) bands is expected to have a massive number of reflecting elements to compensate for the severe propagation losses. However, as the IRS size grows, the conventional far-field assumption starts
Externí odkaz:
http://arxiv.org/abs/2103.15239
This paper summarizes an investigation around millimeter-wave (mmWave) multimode circular antenna array based beamformer capable of specially encoded data transmission in a wide coverage area. The circular antenna array is capable of an entire 360 de
Externí odkaz:
http://arxiv.org/abs/2101.05213
This paper investigates multi-mode and orbital angular momentum (OAM) mode data transmission techniques by a using a circular antenna array, operating at 28 GHz. The classical mode excitation of the latter is modified such that in the horizontal plan
Externí odkaz:
http://arxiv.org/abs/2010.16049
In this article, three new inter-symbol interference (ISI)-free pulses with enhanced performance compared to the state-of-the-art are proposed and studied in terms of frequency and time domain characteristics. They are based on inverse hyperbolic fun
Externí odkaz:
http://arxiv.org/abs/2010.14035