Results 31 to 40 of about 92,941 (196)

Conformal Antenna Array for Millimeter-Wave Communications: Performance Evaluation

, 2015
In this paper, we study the influence of the radius of a cylindrical supporting structure on radiation properties of a conformal millimeter-wave antenna array.
Bisognin, A., Devillers, F., Ferrero, F., Kolmonen, V-M., Kyro, M., Luxey, C., Raisanen, A. V., Semkin, V.   +7 more
core   +3 more sources

Thinning of Sierpinski fractal array antennas using bounded binary fractal-tapering techniques for space and advanced wireless applications

ICT Express, 2019
Fractal arrays are repetitive-geometry-based smart arrays having impressive array factor properties. However, the performance of these arrays degrades owing to their large number of antenna elements at higher expansion levels. This research work presents
V.A. Sankar Ponnapalli, P.V.Y. Jayasree
doaj   +1 more source

BROADBAND ANTENNAS AND ANTENNA ARRAYS WITH REACTIVE LOADS [PDF]

Telecommunications and Radio Engineering, 2018
Subject and Purpose. The results of studies of actual methods for expanding the frequency range of vibrational curved whip and loop antennas, and antenna arrays based on them are presented. Optimal designs of broadband antennas with the concentrated reactive loads included in the shoulders are considered. Methods and methodology.
V. V. Ovsyanikov, E. R. Beznosova
openaire   +1 more source

Capacity Optimization of MIMO Systems Involving Conformal Antenna Arrays using a Search Group Algorithm

Algerian Journal of Signals and Systems, 2020
MIMO systems constitute a backbone of the fourth and fifth generations of wireless communication systems. The purpose of this paper is to introduce the involvement of conformal antenna arrays into MIMO systems.
Abdelmadjid RECIOUI
doaj   +1 more source

Dual-Polarization and Dual-Band Conical-Beam Array Antenna Based on Dual-Mode Cross-Slotted Cylindrical Waveguide

IEEE Access, 2021
Two designs of conical-beam array antennas are presented for different fifth-generation applications. They are based on slotted cylindrical waveguides and a travelling-wave topology, where the waveguide is used to progressively excite a cross-slot array.
Pablo Sanchez-Olivares, Jose Luis Masa-Campos, Eduardo Garcia-Marin   +2 more
doaj   +1 more source

Eliminating stray radiation inside large area imaging arrays

, 2018
With increasing array size, it is increasingly important to control stray radiation inside the detector chips themselves. We demonstrate this effect with focal plane arrays of absorber coupled Lumped Element microwave Kinetic Inductance Detectors (LEKIDs)
Barry, Peter, Baryshev, Andrey, Baselmans, Jochem J. A., Bueno, Juan, Doyle, Simon M., Ferrari, Lorenza, Gao, Jian-Rong, Llombart, Nuria, Murugesan, Vignesh, Thoen, David J., Yates, Stephen J. C., Yurduseven, Ozan, Zmuidzinas, Jonas   +12 more
core   +1 more source

Capacity evaluation of LoS-optimised and standard MIMO antenna arrays at 5.2 GHz [PDF]

, 2007
In this paper, the channel capacity of MIMO communication systems is evaluated from measurements in a home environment at 5.2 GHz. The capacity performance of a novel line-of-sight (LoS)-optimised antenna array architecture is investigated and compared ...
Nix, AR, Sarris, I
core   +2 more sources

W‐band single‐layer circularly‐polarised antenna based on compact gap waveguide

IET Microwaves, Antennas & Propagation
A single‐layered W band circularly polarised (CP) antenna array fed by a sequential feeding network using compact gap waveguides (GWs) with reduced pins is presented.
Zheng Liu, Shi‐Shan Qi, Yingrui Yu, Wen Wu   +3 more
doaj   +1 more source

Performance of the Smart Antenna Aided Generalized Multicarrier DS-CDMA Downlink using both Time-Domain Spreading and Steered Space-Time Spreading

, 2005
In this contribution a generalized MC DS-CDMA system invoking smart antennas for improving the achievable performance in the downlink of the system is studied, which is capable of minimizing the downlink interference inflicted upon co-channel mobiles ...
Hanzo, L., Hu, B., Yang, L-L.
core   +1 more source

Orbital Angular Momentum for Wireless Communications: Key Performance Indicators and Performance Comparison

IEEE Access
Orbital angular momentum (OAM) is an intrinsic property of electromagnetic (EM) waves that has opened new possibilities for enhancing the capacity of wireless communications. Consequently, it has garnered significant attention in recent years.
Zihao Wang, Mohammed El-Hajjar, Lie-Liang Yang   +2 more
doaj   +1 more source