Pub Date : 2023-02-07DOI: 10.1109/IMAS55807.2023.10066905
O. Sokunbi, Hussein Attia, Abubakar Hamza, A. Shamim, A. Kishk
A low-cost innovative MIMO antenna configuration with minimal separation between the radiating elements and high isolation over a wide frequency band is presented. Several precisely designed slots with various forms, locations, and sizes are etched on the radiating patches to improve inter-element isolation throughout the mm-wave band of 30–41 GHz impedance bandwidth. This achieved elements isolation better than 70 dB with an inter-element spacing of 0.2 mm (0.02A at 30 GHz). The suggested self-isolation method is validated by designing a 1x2 MIMO array configuration. The innovative mm-wave antenna has the following characteristics over the desired bandwidth: high impedance bandwidth (30%) and low mutual coupling (70 dB). To the authors' knowledge, the present design is the first to demonstrate such broadband isolation enhancement in the mm-wave frequency range without any sophisticated decoupling structure such as metamaterial or frequency-selective surface.
提出了一种低成本的创新MIMO天线结构，具有最小的辐射元件之间的间隔和在宽频带上的高隔离。在辐射贴片上蚀刻几个具有不同形式、位置和尺寸的精确设计槽，以提高30-41 GHz阻抗带宽的毫米波频段内元件间的隔离。这使得元件隔离优于70 dB，元件间距为0.2 mm (30 GHz时为0.02A)。通过设计一个1x2 MIMO阵列，验证了所提出的自隔离方法。创新毫米波天线在期望带宽上具有以下特点:高阻抗带宽(30%)和低互耦(70 dB)。据作者所知，目前的设计首次在毫米波频率范围内展示了这种宽带隔离增强，而无需任何复杂的去耦结构，如超材料或频率选择表面。
{"title":"Self-Isolated Multiple-Input-Multiple-Output Antenna for mm-Wave Applications","authors":"O. Sokunbi, Hussein Attia, Abubakar Hamza, A. Shamim, A. Kishk","doi":"10.1109/IMAS55807.2023.10066905","DOIUrl":"https://doi.org/10.1109/IMAS55807.2023.10066905","url":null,"abstract":"A low-cost innovative MIMO antenna configuration with minimal separation between the radiating elements and high isolation over a wide frequency band is presented. Several precisely designed slots with various forms, locations, and sizes are etched on the radiating patches to improve inter-element isolation throughout the mm-wave band of 30–41 GHz impedance bandwidth. This achieved elements isolation better than 70 dB with an inter-element spacing of 0.2 mm (0.02A at 30 GHz). The suggested self-isolation method is validated by designing a 1x2 MIMO array configuration. The innovative mm-wave antenna has the following characteristics over the desired bandwidth: high impedance bandwidth (30%) and low mutual coupling (70 dB). To the authors' knowledge, the present design is the first to demonstrate such broadband isolation enhancement in the mm-wave frequency range without any sophisticated decoupling structure such as metamaterial or frequency-selective surface.","PeriodicalId":246624,"journal":{"name":"2023 International Microwave and Antenna Symposium (IMAS)","volume":"100 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":"133123386","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}
Pub Date : 2023-02-07DOI: 10.1109/IMAS55807.2023.10066922
Ahmed S. I. Amar, Nasser Ojaroudi, Mohammad Alibakhshikenari, H. El-Hennawy, M. Darwish
A wide-scan broadband phased array with highly-miniaturized resonators is studied in this paper for 5G cellular networks. Simple and straightforward design procedures are followed. Eight modified dipole antenna resonators have been arranged linearly across the top of the smartphone substrate, which is made of RT5880. The suggested array design is exhibiting a broad impedance bandwidth from 25 to 36 GHz (more than 10 GHz) supporting several candidate bands of 5G spectrum such as 26, 28, 32, and 36 GHz. In addition to its wide operation band and high efficiency, the introduced array offers several promising features such as highly miniaturized profile, well-defined end-fire radiation, wide beam steering capability, as well as sufficient efficiency and gain levels.
{"title":"Wide-Scan Phased Array Antenna Design for Broadband 5G Cellular Networks","authors":"Ahmed S. I. Amar, Nasser Ojaroudi, Mohammad Alibakhshikenari, H. El-Hennawy, M. Darwish","doi":"10.1109/IMAS55807.2023.10066922","DOIUrl":"https://doi.org/10.1109/IMAS55807.2023.10066922","url":null,"abstract":"A wide-scan broadband phased array with highly-miniaturized resonators is studied in this paper for 5G cellular networks. Simple and straightforward design procedures are followed. Eight modified dipole antenna resonators have been arranged linearly across the top of the smartphone substrate, which is made of RT5880. The suggested array design is exhibiting a broad impedance bandwidth from 25 to 36 GHz (more than 10 GHz) supporting several candidate bands of 5G spectrum such as 26, 28, 32, and 36 GHz. In addition to its wide operation band and high efficiency, the introduced array offers several promising features such as highly miniaturized profile, well-defined end-fire radiation, wide beam steering capability, as well as sufficient efficiency and gain levels.","PeriodicalId":246624,"journal":{"name":"2023 International Microwave and Antenna Symposium (IMAS)","volume":"52 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":"127099963","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}
Pub Date : 2023-02-07DOI: 10.1109/IMAS55807.2023.10066911
Davi V. Q. Rodrigues, Changzhi Li
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.
{"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}
Pub Date : 2023-02-07DOI: 10.1109/IMAS55807.2023.10066918
Zainodean du Toit, Fahmi Mokhupuki, D. D. De Villiers
The design of a three-fold symmetry tri-ridged waveguide orthomode transducer is presented. This ridged waveguide setup enhances the single-mode bandwidth of the structure, ensuring that higher-order modes are not excited which in turn eliminates unwanted resonances when the component is used as a horn antenna feeding network. The simulated performance shows a return loss that is below - 20 dB across the entire 3:1 operating bandwidth.
{"title":"Tri-Ridged Waveguide Orthomode Transducer","authors":"Zainodean du Toit, Fahmi Mokhupuki, D. D. De Villiers","doi":"10.1109/IMAS55807.2023.10066918","DOIUrl":"https://doi.org/10.1109/IMAS55807.2023.10066918","url":null,"abstract":"The design of a three-fold symmetry tri-ridged waveguide orthomode transducer is presented. This ridged waveguide setup enhances the single-mode bandwidth of the structure, ensuring that higher-order modes are not excited which in turn eliminates unwanted resonances when the component is used as a horn antenna feeding network. The simulated performance shows a return loss that is below - 20 dB across the entire 3:1 operating bandwidth.","PeriodicalId":246624,"journal":{"name":"2023 International Microwave and Antenna Symposium (IMAS)","volume":"7 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":"127299557","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}
Pub Date : 2023-02-07DOI: 10.1109/IMAS55807.2023.10066883
Enes Aksoy, Haroon Khan, Yun Chen, Leszek Raschkowski, L. Thiele, Sławomir Stańczak
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.
{"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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：