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2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)最新文献

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Unidirectional Quadrupole Antenna on an Ultra-thin Flexible Substrate for 5G IoT Applications 5G物联网应用的超薄柔性基板单向四极天线
2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC) Pub Date : 2021-08-09 DOI: 10.1109/APWC52648.2021.9539553
Rocio Rodriguez-Cano, R. Ziolkowski
{"title":"Unidirectional Quadrupole Antenna on an Ultra-thin Flexible Substrate for 5G IoT Applications","authors":"Rocio Rodriguez-Cano, R. Ziolkowski","doi":"10.1109/APWC52648.2021.9539553","DOIUrl":"https://doi.org/10.1109/APWC52648.2021.9539553","url":null,"abstract":"In this work, the effects of bending our developed unidirectional quadrupole-based broadside-radiating antenna are studied. The compact, ultra-thin planar structure is bent both along its longitudinal and transversal directions. Bending the structure along the short edge (transversal direction), provides very similar performance to the flat structure. On the other hand, when the structure is bent along the long edge, the resonance frequency of the antenna experiences a slight down shift and its front-to-back ratio (FTBR) decreases a little. Nevertheless, it is demonstrated that the performance is still very acceptable and the quadrupolar system works very well in its planar and both bent states.","PeriodicalId":253455,"journal":{"name":"2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129073451","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
A Wideband Lateral Excited Metamaterial Unit Cell with High Refractive Index 高折射率宽带横向激发超材料单体电池
2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC) Pub Date : 2021-08-09 DOI: 10.1109/APWC52648.2021.9539545
Xue Ren, Q. Lin, H. Wong
{"title":"A Wideband Lateral Excited Metamaterial Unit Cell with High Refractive Index","authors":"Xue Ren, Q. Lin, H. Wong","doi":"10.1109/APWC52648.2021.9539545","DOIUrl":"https://doi.org/10.1109/APWC52648.2021.9539545","url":null,"abstract":"Metamaterial unit cell-based lens antennas have been widely investigated due to their outstanding ability of controlling electromagnetic wave [1] . On the basis of different metamaterial unit cell design, negative-, low/zero-, and gradient-refractive index lens antennas have been developed. In general, the metamaterial unit cell with high refractive index and wideband is preferred in such designs to improve the lens’ performance. Traditionally, the lenses are usually excited by normal or oblique incident waves. For some special applications, such as end-fire lens antenna [2] and planar antenna [3] , metamaterial lenses usually located inside the radiation aperture or the unit cell is printed on the substrate, making the lateral excited lens is more applicable. Besides, the lateral excitation scheme avoids the limitation of choosing the height of commercial substrate, especially for the lenses composed of core layer and corresponding impedance layer. Therefore, a wideband lateral excited metamaterial unit cell is proposed and its effective refractive index is investigated in this contribution.","PeriodicalId":253455,"journal":{"name":"2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121376577","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
Analysis and Simulation of the Effects of Superstate Layer on the Performance of Microstrip Antennas 超态层对微带天线性能影响的分析与仿真
2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC) Pub Date : 2021-08-09 DOI: 10.1109/APWC52648.2021.9539779
Amanda Karine Miranda, L. M. de Mendonça
{"title":"Analysis and Simulation of the Effects of Superstate Layer on the Performance of Microstrip Antennas","authors":"Amanda Karine Miranda, L. M. de Mendonça","doi":"10.1109/APWC52648.2021.9539779","DOIUrl":"https://doi.org/10.1109/APWC52648.2021.9539779","url":null,"abstract":"Nowadays studies show that when layers of dielectric superstructures are placed above a microstrip patch antenna, changes in its gain and resonant characteristics are observed. Thus, this paper investigates the effect of the height of the superstrate above the antenna by simulation, obtained using High-Frequency Structure Simulator (HFSS) software that is the commercial tool used here for microwave structures design. As a result, we obtain a better performance, main the gain of the antenna of the antenna, by incorporating those superstrates. The analyzed antenna covers the frequency S-band, with a range from 2 GHz to 4 GHz. This antenna structure with a superstrate can be used in communications satellites.","PeriodicalId":253455,"journal":{"name":"2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116556379","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
Antenna Reflections in Shared-Antenna In-Band Full-Duplex Systems : (Invited Paper) 共享天线带内全双工系统中的天线反射(特邀论文)
2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC) Pub Date : 2021-08-09 DOI: 10.1109/APWC52648.2021.9539694
K. Kolodziej, J. Doane, B. Perry
{"title":"Antenna Reflections in Shared-Antenna In-Band Full-Duplex Systems : (Invited Paper)","authors":"K. Kolodziej, J. Doane, B. Perry","doi":"10.1109/APWC52648.2021.9539694","DOIUrl":"https://doi.org/10.1109/APWC52648.2021.9539694","url":null,"abstract":"As opposed to multiple-antenna solutions, in-band full-duplex (IBFD) systems can utilize a shared antenna for signal transmission and reception to reduce the device form factor. These single-antenna designs, however, must additionally consider the self-interference (SI) that is generated by antenna impedance-mismatch reflections. This paper investigates the effect of different antenna loads and transmission line lengths for commercially-available magnetic circulator and omnidirectional antenna components operating between 2 and 6 GHz. The results indicate that both the load impedance and the distance between the antenna and interface device can drastically impact the composite SI frequency-selectivity, which influences the overall IBFD system bandwidth.","PeriodicalId":253455,"journal":{"name":"2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126789307","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
Radiation Pattern Reconfigurable Antenna Using Liquid Metal Vias 基于液态金属过孔的辐射方向图可重构天线
2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC) Pub Date : 2021-08-09 DOI: 10.1109/APWC52648.2021.9539582
Shaker Alkaraki, J. Kelly, M. Allayioti
{"title":"Radiation Pattern Reconfigurable Antenna Using Liquid Metal Vias","authors":"Shaker Alkaraki, J. Kelly, M. Allayioti","doi":"10.1109/APWC52648.2021.9539582","DOIUrl":"https://doi.org/10.1109/APWC52648.2021.9539582","url":null,"abstract":"This paper presents a moderately high directivity (~12 dBi) antenna having a reconfigurable radiation pattern. The proposed antenna, illustrated in Fig. 1 , is closely based on existing designs [1] - [2] . The proposed antenna consists of a driven element, surrounded by four parasitics. Both the driven element and parasitics, are circular microstrip patch resonators and all have a radius of 9.6mm. The driven element is fed using an SMA connector and energy from this element couples into the parasitics. Each parasitic incorporates a chill hole. A key novelty of the work is that we use a commercially available liquid metal (EGaIn) based on an alloy of Gallium to fill the hole and form a via. When the via is in place we say that the parasitic is ON. Consequently that particular parasitic is short circuited to ground, causing it to act as a reflector. This has the effect of reducing the electric field strength on the surface of those patches to a very low level which effectively deactivates the excitation of TMu mode, as shown in Fig. 2(a) and (b) . The beam, therefore steers away from the ON state parasitics. When the via is removed we say that the parasitic is OFF and it acts as a director. The OFF state parasitics have the effect of increasing the aperture area of the antenna and hence the directivity. The antenna is designed on a substrate with a thickness of 1 mm and dielectric constant of 2.7. The overall dimensions of the proposed antenna are 34 mm × 34 mm","PeriodicalId":253455,"journal":{"name":"2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125956188","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: 3
Reconfigurable Surface Wave Fluid Antenna for Spatial MIMO Applications 用于空间MIMO应用的可重构表面波流体天线
2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC) Pub Date : 2021-08-09 DOI: 10.1109/APWC52648.2021.9539785
Yuanjun Shen, K. Tong, Kai‐Kit Wong
{"title":"Reconfigurable Surface Wave Fluid Antenna for Spatial MIMO Applications","authors":"Yuanjun Shen, K. Tong, Kai‐Kit Wong","doi":"10.1109/APWC52648.2021.9539785","DOIUrl":"https://doi.org/10.1109/APWC52648.2021.9539785","url":null,"abstract":"This paper presents the design of a surface wave fluid antenna which can realizes beamshaping and spatial diversity for MIMO applications. The proposed design only required one RF input to achieve spatial diversity when comparing to the conventional multiple RF input ports approaches. The surface wave fluid antenna is designed for the millimeter-wave 5G mobile communications band from 24 to 28 GHz. The simulation results show that the radiation direction of the antenna can be controlled by changing the position of the fluid metal radiator.","PeriodicalId":253455,"journal":{"name":"2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125196490","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: 5
On the Utility of 3D Printing for the Design of Meanderline Polarizers 3D打印技术在曲线形偏光片设计中的应用
2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC) Pub Date : 2021-08-09 DOI: 10.1109/apwc52648.2021.9539856
Songyi Yen, G. R. Friedrichs, E. Lier, T. Hand, W. N. Kefauver, D. Filipović
{"title":"On the Utility of 3D Printing for the Design of Meanderline Polarizers","authors":"Songyi Yen, G. R. Friedrichs, E. Lier, T. Hand, W. N. Kefauver, D. Filipović","doi":"10.1109/apwc52648.2021.9539856","DOIUrl":"https://doi.org/10.1109/apwc52648.2021.9539856","url":null,"abstract":"To achieve circular polarization (CP) from a linearly polarized (LP) antenna, we typically use polarizers. These structures, often referred to as circular polarizers, use layers of printed highly conducting meandered lines separated by dielectric spacers [1]. The latter are often chosen to be lightweight, low permittivity foam, for example Rohacell. As an extension of this concept, discussed herein is the replacement of homogenous commercial off-the-shelf foam spacers with a dielectric lattice. This structure is fabricated using 3D printing, resulting in lower lead times, lower costs, and increased customizability. In this work, we integrate a meanderline polarizer (MLP) with a planar inverted-F antenna (PIFA) unit-cell using artificial 3D printed dielectric.","PeriodicalId":253455,"journal":{"name":"2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"172 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133644632","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: 1
Large-Signal Performance Optimization of Inverted-F Antenna Tuned by Switchable RF Capacitor 可切换射频电容调谐倒f天线的大信号性能优化
2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC) Pub Date : 2021-08-09 DOI: 10.1109/APWC52648.2021.9539628
V. Solomko, Oguzhan Oezdamar, R. Weigel, A. Hagelauer
{"title":"Large-Signal Performance Optimization of Inverted-F Antenna Tuned by Switchable RF Capacitor","authors":"V. Solomko, Oguzhan Oezdamar, R. Weigel, A. Hagelauer","doi":"10.1109/APWC52648.2021.9539628","DOIUrl":"https://doi.org/10.1109/APWC52648.2021.9539628","url":null,"abstract":"Harmonics emission by an aperture-tuned IFA (inverted-F antenna) is studied. The analytical analysis is conducted using a transmission-line model of the antenna. Based on the results of analysis, an optimization example for the large-signal performance of a carrier-aggregation front-end tuned by a high-voltage switchable RF capacitor is presented, the findings are supported by the measurements on a hardware demonstrator. According to the experimental results, the power of a second harmonic at 1800 MHz coupled from the main into diversity antenna is reduced by 10 dB by fine-selecting the position of the capacitor-based tuning network along the radiating element of the main antenna.","PeriodicalId":253455,"journal":{"name":"2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123398143","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
Massive-Beam MIMO for LEO/VLEO VHTS 用于LEO/VLEO VHTS的大波束MIMO
2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC) Pub Date : 2021-08-09 DOI: 10.1109/APWC52648.2021.9539866
S. Foo, Wen Tong
{"title":"Massive-Beam MIMO for LEO/VLEO VHTS","authors":"S. Foo, Wen Tong","doi":"10.1109/APWC52648.2021.9539866","DOIUrl":"https://doi.org/10.1109/APWC52648.2021.9539866","url":null,"abstract":"This paper presents a new concept of high-gain steerable massive-beam MIMO phased array. Massive-MIMO technology is well developed for terrestrial communications but has not yet been implemented for satellite communications primarily due to factors such as long transmission delay, short coherence time and high atmospheric losses, which makes it impossible to obtain the required instantaneous channel state information (iCSI). The proposed method uses massive number of overlapping beams in orthogonal beam space and simplified linear precoding using statistical CSI to achieve the massive MIMO performance. The massive orthogonal-beam-space array results in higher signal strength (SNR) for the pilot signals and much faster array processing. This concept is particularly suited for future low-orbit very-high-throughput satellite (VHTS) communications.","PeriodicalId":253455,"journal":{"name":"2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125026293","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
Novel Aspects of Horn-Antenna Beam Misalignment at THz Frequencies 太赫兹频段喇叭天线波束失调的新问题
2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC) Pub Date : 2021-08-09 DOI: 10.1109/apwc52648.2021.9539835
F. Sheikh, Yamen Zantah, M. Al-Hasan, T. Kaiser
{"title":"Novel Aspects of Horn-Antenna Beam Misalignment at THz Frequencies","authors":"F. Sheikh, Yamen Zantah, M. Al-Hasan, T. Kaiser","doi":"10.1109/apwc52648.2021.9539835","DOIUrl":"https://doi.org/10.1109/apwc52648.2021.9539835","url":null,"abstract":"To achieve 1 Tb/s wireless links considering simplified modulation schemes, that are in short-range and at terahertz (THz) frequencies, the quest for overwhelming extreme bandwidths is self-evident. In this paper, we analyze the channel performance and limitations of THz communication systems at 300 GHz carrier frequency due to the horn-antenna beam misalignment in line-of-sight (LoS) scenario. Firstly, a ray-tracer is employed to examine the implications of beam spot size for varied distances. Then, these effects are studied in terms of link coverage and the achievable data rates when altering the antenna positions horizontally and vertically. A VNA-based 300 GHz transmission system is used to experimentally validate the above mentioned implications in terms of distance and antenna positions. Finally, the impact of beam spot size is studied by rotating the antennas. To the best of our knowledge, this work reports the first ever recorded implications of beam spot size on the THz wireless links.","PeriodicalId":253455,"journal":{"name":"2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125944919","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: 1
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