scholarly journals Magneto-Optical Isolator Based on Ultra-Wideband Photonic Crystals Waveguide for 5G Communication System

Crystals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 570 ◽  
Author(s):  
Yong Wang ◽  
Biaogang Xu ◽  
Dengguo Zhang ◽  
Shixiang Xu ◽  
Zheng Dong ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Communication Systems ◽  
High Efficiency ◽  
Three Dimensional ◽  
Transmission Efficiency ◽  
Ultra Wideband ◽  
Wave Band ◽  
Optical Isolator ◽  
Millimeter Wave Band ◽  
5G Communication

This paper presents a novel magneto-optical isolator based on an ultra-wideband and high efficiency photonic crystals (PCs) waveguide and gyromagnetic ferrites. The three-dimensional numerical simulation finds that the photonic crystals waveguide’s (PCW) transmission efficiency rises with its height and width. The corresponding experiments are performed by using a triangular lattice Al2O3 dielectric posts array in 5G millimeter wave band. The measured transmission efficiency is up to 90.78% for the optimal PCs waveguide structure, which has ultra-wide operating bandwidth from 23.45 to 31.25 GHz. The magneto-optical isolator is designed by inserting two rectangular gyromagnetic ferrites into the PCs waveguide. Due to the contrast between the effective permeability of the left and right circular polarization waves passing through the magnetized ferrite sheets, the ferromagnetic resonance absorption of the forward and reverse waves is different. By using finite element method, the isolation is optimized to be 49.49 dB for the isolator and its relative bandwidth reaches 8.85%. The high isolation, broadband, and easy integration indicate that our designed magneto-optical isolator has significant advantage in 5G communication systems.

scholarly journals Nature Inspired MIMO Antenna System for Future mmWave Technologies

Micromachines ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1083
Author(s):  
Saifur Rahman ◽  
Xin-cheng Ren ◽  
Ahsan Altaf ◽  
Muhammad Irfan ◽  
Mujeeb Abdullah ◽  
...  
Keyword(s):  
Communication Systems ◽  
High Efficiency ◽  
Multiple Input Multiple Output ◽  
Antenna System ◽  
Potential Candidate ◽  
Mimo Antenna ◽  
Communication Devices ◽  
Input Multiple Output ◽  
Measured Efficiency ◽  
5G Communication

In this work, a new Multiple Input Multiple Output (MIMO) antenna system with a novel shape inspired by nature is proposed for Fifth-Generation (5G) communication systems. The antenna is designed on a Rogers 5880. The dielectric constant of the substrate is 2.2, and the loss tangent is assumed to be 0.0009. The gain of the system for the desired bandwidth is nearly 8 dB. The simulated and the measured efficiency of the proposed system is 95% and 80%, respectively. To demonstrate the capability of the system as a potential candidate for future 5G communication devices, MIMO key performance parameters such as the Envelope Correlation Coefficient (ECC) and Diversity Gain (DG) are computed. It is found that the proposed system has low ECC, constant DG, and high efficiency for the desired bandwidth.

scholarly journals Ultra-Wideband Dual-Polarized Antenna With Three Resonant Modes for 2G/3G/4G/5G Communication Systems

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 43214-43221 ◽  
Author(s):  
Yaohui Zhang ◽  
Yonghong Zhang ◽  
Daotong Li ◽  
Kunning Liu ◽  
Yong Fan
Keyword(s):  
Communication Systems ◽  
Ultra Wideband ◽  
Resonant Modes ◽  
5G Communication ◽  
Dual Polarized ◽  
Dual Polarized Antenna

scholarly journals Four Ports Double Y-Shaped Ultra-Wideband Magneto-Photonic Crystals Circulator for 5G Communication System

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 120463-120474 ◽  
Author(s):  
Yong Wang ◽  
Dengguo Zhang ◽  
Biaogang Xu ◽  
Zheng Dong ◽  
Xuanke Zeng ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Communication System ◽  
Ultra Wideband ◽  
5G Communication

Study of photonic crystals at millimeter wave band

2007 ◽  
Author(s):  
Mingyu Lu ◽  
Nan-Wei Chen ◽  
Jonathan W. Bredow ◽  
Sungyong Jung ◽  
Saibun Tjuatja
Keyword(s):  
Photonic Crystals ◽  
Millimeter Wave ◽  
Wave Band ◽  
Millimeter Wave Band

scholarly journals Waveguide Manufacturing Technologies for Next-Generation Millimeter-Wave Antennas

Micromachines ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1565
Author(s):  
Lucas Polo-López ◽  
Pablo Sanchez-Olivares ◽  
Eduardo García-Marín ◽  
Jorge A. Ruiz-Cruz ◽  
Juan Córcoles ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Communication Systems ◽  
Phase Shifter ◽  
Electrical Discharge Machining ◽  
Wave Band ◽  
Next Generation ◽  
Direct Metal Laser Sintering ◽  
Millimeter Wave Band ◽  
Manufacturing Technologies ◽  
Millimeter Wave Antennas

Some recent waveguide-based antennas are presented in this paper, designed for the next generation of communication systems operating at the millimeter-wave band. The presented prototypes have been conceived to be manufactured using different state-of-the-art techniques, involving subtractive and additive approaches. All the designs have used the latest developments in the field of manufacturing to guarantee the required accuracy for operation at millimeter-wave frequencies, where tolerances are extremely tight. Different designs will be presented, including a monopulse antenna combining a comparator network, a mode converter, and a spline profile horn; a tunable phase shifter that is integrated into an array to implement reconfigurability of the main lobe direction; and a conformal array antenna. These prototypes were manufactured by diverse approaches taking into account the waveguide configuration, combining parts with high-precision milling, electrical discharge machining, direct metal laser sintering, or stereolithography with spray metallization, showing very competitive performances at the millimeter-wave band till 40 GHz.

scholarly journals System Coverage and Capacity Analysis on Millimeter-Wave Band for 5G Mobile Communication Systems with Massive Antenna Structure

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Jun Suk Kim ◽  
Jae Sheung Shin ◽  
Sung-Min Oh ◽  
Ae-Soon Park ◽  
Min Young Chung
Keyword(s):  
Millimeter Wave ◽  
Mobile Communication ◽  
Mobile Communications ◽  
Communication Systems ◽  
Wave Band ◽  
Mobile Communication Systems ◽  
Antenna Structure ◽  
Millimeter Wave Band ◽  
5G Mobile Communications ◽  
Central Network

The use of a millimeter-wave band defined as a 30–300 GHz range is significant element for improving performance of 5th generation (5G) mobile communication systems. However, since the millimeter-wave signal has peculiar propagation characteristics especially toward non-line-of-sight regions, the system architecture and antenna structure for 5G mobile communications should be designed to overcome these propagation limitations. For realization of the 5G mobile communications, electronics and telecommunications research institute (ETRI) is developing central network applying various massive antenna structures with beamforming. In this paper, we have introduced the central network and evaluated the system coverage and capacity through C++ language-based simulations with real geospatial information.

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