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Data transmission capacity of ad-hoc wireless networks could be increased by using multi-path transmission and minimising mutual interference between nodes. This approach could also be used to extend D2D communication opportunities in 5G. The objective of this paper is theoretical analysis and computer simulation to reveal the best conditions for combining smart antennas and multi-path transmission...
We investigated the millimeter-wave absorber integrated planar slot array antenna for a 120-GHz-band close proximity wireless system. Precise alignment and multiple reflection between Tx-Rx antennas become the problem for the application of >100-GHz-close-proximity wireless system. The millimeter-wave absorber integrated planar slot array antenna solves these problems. We adopted the split-ring...
Design one-dimensional antenna array of eight-elements using composite materials for wireless imaging transmission system is proposed in this paper. Firstly, the single element is designed to resonate at Zeroth-order using a pair of Double positive (DPS) and Epsilon negative (ENG) materials meta-structured transmission line (MTL). Secondly, using seven of 1:2 T-Junction power dividers based on microstrip...
Terahertz (THz) band (0.1–10 THz) communication, which is envisioned as one of the key wireless communication technologies of the next decade, exhibits an extremely large bandwidth at the cost of an extremely high path loss. The unique distance-dependent behavior on the available bandwidth in THz communication interrelates all THz properties, and affects the design and performances within and across...
We have proposed and developed array-antenna-electrode electro-optic modulators for 5G mobile communication systems in dense user environments. In this paper, we report a newly-designed device for the operation in 60 GHz band with the orthogonal polarization. This device is applicable for MMW wireless polarization multiplexing.
A novel high gain printed dipole-yagi antenna array is proposed in this paper. This antenna has the gain peak of 15.86 dBi and the bandwidth of 1.4 GHz from 4.2 GHz to 5.6 GHz with wide angle coverage in azimuth plane. An antenna prototype has been tested in this paper. The measurements agree with simulations results. This low-profile antenna is easily integrated in front-end for modern wireless communication...
This paper presents an orbit angular momentum (OAM) based wireless communication system combined with multi-input multi-ouput (MIMO) technique, where each MIMO branch multiplexes several OAM signals. The achievable sum-rate and array gain of the OAM-MIMO system relative to pure MIMO are analyzed. Results show that, when at near distance, e.g, the OAM beams are such collimated that each branch suffers...
The features of compact-range communication system is introduced briefly. The system in presence of a shadowing object is simply modelled. Modified Edge Representation is applied to evaluate field strength of the system. In the end, bit error rate (BER) is roughly estimated under the multipath-free condition.
In this paper, several Terahertz (THz) high-gain planar integrated antenna arrays developed in University of Electronic Science and Technology of China (UESTC) are introduced based on the diffusion welding technology. Thanks to their wideband, high-gain and compact configuration, these types of antenna arrays present excellent candidates for THz multi-gigahertz capacity wireless systems.
This paper presents our study on a single-offset parabolic reflector antenna operating at 220 GHz, which offers high gain as well as the capability of beam steering for longdistance high-capacity terahertz wireless communications. With a switch-controlled array placing on the offset focal plane as the primary feed, the beam steering can be realized by selecting single element in different position...
This paper investigates potential advantages of linear irregular sparse antenna arrays over their regular counterparts in a mm-wave line-of-sight (LOS) multiple-input multiple-output (MIMO) scenario. The comparison is based on numerical computations of MIMO eigenvalues of the corresponding channel matrices and the resulting channel capacity. Identical linear antenna arrays are assumed at the transmitter...
Presented is a method to produce a 2D reference test zone for over-the-air measurements in a random line-of-sight environment for vehicular applications. The ideal threshold receiver model is used to design the chamber array at 3 GHz for LTE/LTE-A systems. The analysis focuses on the fluctuations of the reference power measurements at a user-defined probability of detection level of bit-streams. Numerical...
MIMO technology is expected to play a key role in the endeavour to reach the capacity target of 5G systems, in conjunction with the use of frequencies above 6 GHz. This communication paradigm is anticipated to be utilised also in the wireless backhaul domain, in order to meet the high capacity requirements of the future wireless transport networks. The performance of the considered MIMO transmission...
Liquid crystal polymer (LCP) substrates are used to design 3D conformal antenna elements in laser direct structuring technology (LDS) for MIMO and phased-array applications. Perspectives for energy-oriented built-in-self-test (BIST) compensation solutions are drawn for multiphysics electromagnetic-thermal-mechanical co-design of chip-package-PCB systems undergoing stochastic changes in their integration...
Power dividers/combiners are used as fundamental unit for power combining/splitting in different RF/Microwave circuits such as power amplifier modules, antenna array feeds or mixers. Most common types are based on quarter wave transmission line and their miniaturization is challenging especially in frequency less than GHz range where they exhibit very large physical size that make their use impractical...
This paper presents a high-gain millimeter-wave array antenna highly integrated on a single organic chip package. The multi-phased beam steering capability is enabled to reduce multipath fading and over-the-air applications around 30GHz. To improve antenna bandwidth, gain and radiation efficiency, a dual-patch antenna is built on a superstrate structure. A number of design attributes, such as patch,...
In this work, we present the design of a novel large load-controlled multiple-active multiple-passive (LC-MAMP) antenna array that operates at 19.25 GHz. In addition, we describe a method that enables us to perform robust, low-complexity, arbitrary channel-dependent precoding with such arrays as well as a communication protocol that limits the computational complexity associated with beam tracking...
For mounting antennas on a thin (ka∼0.5) cylindrical platform, new designs are required. In this paper, a conformal Planar Inverted-F Antenna (PIFA) for mounting on such a cylinder is presented. The PIFA configuration is low cost and easily fabricated. Simulations indicate a −10dB impedance bandwidth of 16%. This new design is a good candidate for antennas for wireless communications and navigation...
Cloud Modulation (CM) is a novel transmission method that mitigates the non-linear impairments introduced by the Radio-over-Fiber (RoF) links of a distributed antenna system. In CM, constant-envelope phase-modulated radio symbols are transmitted over the fiber fronthaul to mitigate the non-linear distortion originated by the opto-electrical interfaces, optical fibers, and RF power amplifiers. In contrast...
This paper describes the first available 5G testbeds as designed by 5G CHAMPION, a collaborative research project undertaken by over twenty consortium members and targeting the provision of 5G services at the 2018 Winter Olympics in Korea. In order to provide 5G services such as augmented reality (AR), virtual reality (VR), high quality, interactive multi-player video games, the testbeds shall fulfill...
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