2023 International Microwave and Antenna Symposium (IMAS)最新文献_第7页

Self-Isolated Multiple-Input-Multiple-Output Antenna for mm-Wave Applications 用于毫米波应用的自隔离多输入多输出天线

2023 International Microwave and Antenna Symposium (IMAS) Pub Date : 2023-02-07 DOI: 10.1109/IMAS55807.2023.10066905

O. Sokunbi, Hussein Attia, Abubakar Hamza, A. Shamim, A. Kishk

引用次数: 0

Wide-Scan Phased Array Antenna Design for Broadband 5G Cellular Networks 宽带5G蜂窝网络宽扫描相控阵天线设计

2023 International Microwave and Antenna Symposium (IMAS) Pub Date : 2023-02-07 DOI: 10.1109/IMAS55807.2023.10066922

Ahmed S. I. Amar, Nasser Ojaroudi, Mohammad Alibakhshikenari, H. El-Hennawy, M. Darwish

引用次数: 2

A Microwave Passive Topology Based on Simultaneous Injection-Locking and Injection-Pulling for Passive Indoor Sensing Applications 一种基于同时注入锁定和注入拉动的微波无源拓扑用于被动室内传感

2023 International Microwave and Antenna Symposium (IMAS) Pub Date : 2023-02-07 DOI: 10.1109/IMAS55807.2023.10066911

Davi V. Q. Rodrigues, Changzhi Li

{"title":"A Microwave Passive Topology Based on Simultaneous Injection-Locking and Injection-Pulling for Passive Indoor Sensing Applications","authors":"Davi V. Q. Rodrigues, Changzhi Li","doi":"10.1109/IMAS55807.2023.10066911","DOIUrl":"https://doi.org/10.1109/IMAS55807.2023.10066911","url":null,"abstract":"The opportunistic use of ambient radio-frequency (RF) signals for e-healthcare, smart living, security, and IoT applications has been attracting significant attention over the last years. Researchers and engineers have already proposed various approaches to integrate wireless communication with remote sensing by passively collecting Wi-Fi 2.4-GHz frequency band signals in indoor environments. Most of the existing passive sensing methods demand complex digital signal processing algorithms and/or adaptations to existent radio topology. In this paper, a passive microwave topology based on simultaneous injection-locking and injection-pulling of a RF oscillator for indoor passive sensing applications is presented. The direct-path signals from a source of RF waves and the signals that are phase-modulated by the target's motion are captured, combined, and fed into the injection-locking port of an oscillator. Due to the highly selective injection-locking for the stronger direct-path signal, and the injection-pulling behavior for the weaker scattered signal, the phase shifts of the electromagnetic waves that bounce off a moving target can be recovered. Experimental results demonstrate the feasibility of the proposed technique for microwave passive vital signs monitoring.","PeriodicalId":246624,"journal":{"name":"2023 International Microwave and Antenna Symposium (IMAS)","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114343860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tri-Ridged Waveguide Orthomode Transducer 三脊波导正交换能器

2023 International Microwave and Antenna Symposium (IMAS) Pub Date : 2023-02-07 DOI: 10.1109/IMAS55807.2023.10066918

Zainodean du Toit, Fahmi Mokhupuki, D. D. De Villiers

引用次数: 0

Accurate Vegetation Models with Low Computational Complexity for Ray Tracing 低计算复杂度的精确植被射线追踪模型

2023 International Microwave and Antenna Symposium (IMAS) Pub Date : 2023-02-07 DOI: 10.1109/IMAS55807.2023.10066883

Enes Aksoy, Haroon Khan, Yun Chen, Leszek Raschkowski, L. Thiele, Sławomir Stańczak

{"title":"Accurate Vegetation Models with Low Computational Complexity for Ray Tracing","authors":"Enes Aksoy, Haroon Khan, Yun Chen, Leszek Raschkowski, L. Thiele, Sławomir Stańczak","doi":"10.1109/IMAS55807.2023.10066883","DOIUrl":"https://doi.org/10.1109/IMAS55807.2023.10066883","url":null,"abstract":"The frequency bands for communication standards are continuously increasing, as it can be seen from fifth generation (5G) and beyond 5G communications. This is done, to increase the capabilities of communication systems and enable new technologies, e.g. autonomous driving and wireless sensor networks. Therefore, reliable channel characterization methods, such as ray tracing, are needed to implement and guarantee the functionality of these new technologies. The effects of vegetation on ray tracing simulations are often times dismissed, due to their modeling challenges and high resulting computational overhead for simulations, as well as their generally small influence on the communication channel. However, with increasing frequencies for 5G, these effects cannot be dismissed anymore. So despite the modeling challenges, vegetation effects have to be included in ray tracing simulations for an accurate channel characterization. This paper aims to create a vegetation model with low computational complexity for ray tracing simulations, while depicting the effects of real vegetation as close as possible. It is shown, that even simple approaches to model vegetation with low computational overhead are often times sufficient to capture significant effects on the communication channel.","PeriodicalId":246624,"journal":{"name":"2023 International Microwave and Antenna Symposium (IMAS)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115039747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0