Advanced searches left 3/3

5g - Wiley Online Library

Summarized by Plex Scholar
Last Updated: 10 May 2022

* If you want to update the article please login/register

Metamaterial inspired LPDA MIMO array for upper band 5G applications

paraphrasedoutput array is introduced in this paper. An improved upper band 5G multiple-output array is shown in this paper. The new array is based on a wide band LPDA antenna loaded with epsilon near-zero index metamaterial. More than dBi gain increase can be attributed to the metamaterial cells' conversion, which has led to more than 3 dBi gain. The array covers a wide variety of MMW frequencies, from 26 up to 39 GHz. The LPDA antenna element build consists of five arms printed on RO5880 substrate, with alternating five arms printed on it. Both ends of the substrate are uniformly placed on parallel microstrip feeding transmission lines. The MIMOLPDA array has stable radiation characteristics over the operating band, according to its owner. At 36 GHz for a single element radiator, a maximum realized gain of 11 dBi is achieved. Both the single antenna element and the MIMO array have excellent agreement with simulation results, according to the fabricated prototypes.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/mmce.23212


Improving the working volume by a high‐efficiency antenna array in a reverberation chamber for 5G testing

However, the RC's common metal mechanical stirrer takes up a substantial space. In RC, the measurement results are compared to the metal mechanical stirrer, revealing that the antenna array increases the working volume and stirrer significantly.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/mmce.23207


Asymmetric‐fed triband antenna for military radars and 5G applications using microstrip technology

In microstrip antennas, antenna size reduction while maintaining high quality and multiband characteristics with wide bandwidths is highly sought and challenging in microstrip antennas. On a 7 1 mm3 FR4 substrate with a permittivity of 4. 4 and a loss tangent of 0. 02. In both the operating frequency bands, the rated antenna shows a maximum stable gain of 5. 32 dB and an average radiation efficiencies of 77. 87%. The resulting results show that the quasi-rho-shaped antenna is suitable for military radars and 5G applications.

Source link: https://onlinelibrary.wiley.com/doi/10.1049/tje2.12142


A low‐profile dual‐band dual‐polarized tightly spaced antenna array with artificial magnetic conductor surface for 5G micro base station application

In this paper, a new low-profile dual-band dual-polarized closely spaced antenna array with artificially coated conductor surface for 5G micro base station applications is suggested. The final results reveal that the dual band array has an impedance bandwidth of 13. 8% to 6%, covering China's sub-6GHz band. The antenna's greatest realized gain is 10 dBi at the lower band and 13. 7 dBi at the upper band, making it a good candidate for 5G micro base stations.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/mmce.23192


BCSM: Blockchain‐based cooperative spectrum management system for 5G NR‐U and WiFi coexistence in the unlicensed band

To reduce traffic jam and increase 5G network capacity in the unlicensed band, the 5G NRU technology helps 5G networks in the unlicensed band to relieve traffic jam and boosts 5G networks' capacity. The unlicensed band is already used by several heterogeneous network access technologies. As a result, 5G NRU networks will be operational in the vicinity of other coexisting networks, such as WiFi networks in the 5 GHz and 6 GHz bands, which include WiFi networks. As the decision about the spectrum state is made based on the local decisions of multiple sensing nodes, Cooperative Spectrum Sensing enhances the spectrum assessment process. CSS is abused by combining blockchain technology with Blockchain technology to produce a decentralized cooperative spectrum management platform called Blockchain-Based Cooperative Spectrum Management. An algorithm is developed for performing distributed cooperative spectrum analysis between the 5G NRU base stations and the traffic in their immediate vicinity.

Source link: https://onlinelibrary.wiley.com/doi/10.1049/cmu2.12399


Practical and secure multifactor authentication protocol for autonomous vehicles in 5G

Autonomous cars can not only improve traffic flow and congestion, but also have strategic significance for the growth of the transportation industry. The problems of AV can be solved by taking advantage of 5G ultra-wide bandwidth, low latency, and high availability when combined with Internet of Vehicles. Hence, this paper recommends a flexible and safe multifactor authentication scheme for AV in a 5G network. The article demonstrates the protocol's reliability by BAN logic and Scyther simulation. According to an informal security review, the protocol meets the current security requirements.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/spe.3087

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions