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A Wideband Wearable Antenna Based on Metasurface 一种基于超表面的宽带可穿戴天线
2020 IEEE International RF and Microwave Conference (RFM) Pub Date : 2020-12-14 DOI: 10.1109/RFM50841.2020.9344787
S. Yan, Kai Zhang, P. Soh
{"title":"A Wideband Wearable Antenna Based on Metasurface","authors":"S. Yan, Kai Zhang, P. Soh","doi":"10.1109/RFM50841.2020.9344787","DOIUrl":"https://doi.org/10.1109/RFM50841.2020.9344787","url":null,"abstract":"This paper presents a design of a wideband antenna based on metasurface for wearable applications. The operating band of the proposed antenna can cover the industrial, scientific, and medical (ISM) 2.45 GHz band, and the resonant frequencies can be tuned simply by adjusting the dispersion curve of the metasurface through the calculation of a single unit cell. In this design, the metasurface consists of a 3×3 array of unit cells, which are fed by a printed coplanar waveguide (CPW) monopole antenna. By modeling the metasurface as a two dimensional composite right/left-handed transmission line (CRLH TL), the negative modes can be excited in this design, which can miniaturize the dimension of the antenna significantly. Then two negative modes are combined to extend the working band. The footprint of the proposed antenna is 50.6×43.5 mm2 (0.14λ02), and the impedance matching band ranges from 2.2 GHz to 2.65 GHz, with a fractional bandwidth of 18.3%. The maximum gain is 4.35 dBi and 2.57 dBi in free space and on the human body, respectively. This design provides a new approach to realize wideband miniaturized antennas for wearable applications.","PeriodicalId":138339,"journal":{"name":"2020 IEEE International RF and Microwave Conference (RFM)","volume":"266 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122945109","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: 2
Impact of Mode of Operations on the Electromagnetic Emissions of a Complex Electronic Device 操作方式对复杂电子器件电磁发射的影响
2020 IEEE International RF and Microwave Conference (RFM) Pub Date : 2020-12-14 DOI: 10.1109/RFM50841.2020.9344780
M. Baharuddin, Mohammad Tausiful Islam, T. Yuwono, C. Smartt, David W. P. Thomas
{"title":"Impact of Mode of Operations on the Electromagnetic Emissions of a Complex Electronic Device","authors":"M. Baharuddin, Mohammad Tausiful Islam, T. Yuwono, C. Smartt, David W. P. Thomas","doi":"10.1109/RFM50841.2020.9344780","DOIUrl":"https://doi.org/10.1109/RFM50841.2020.9344780","url":null,"abstract":"Predicting the propagation of electromagnetic (EM) emissions by using a method based on the Wigner transformation requires source data from near-field measurement. The near-field data can be recorded in a time domain via a two-probe measurement system. Before the measurement is performed, the chosen device under test must be investigated to understand how the programs running in the background could affect the characteristic of the EM emissions. Three different programs, namely local number crunching, filling random numbers into sequential addresses and filling random numbers into random addresses, are tested and analysed. Time-frequency plot and autocorrelation function analysis are used as tools to study the effect of the device's mode of operations on the characteristic of the radiated emissions. Results from the time-frequency plot analysis prove that different programs can produce EM emissions of different characters and, at the same time, affect the ensemble average of the autocorrelation function.","PeriodicalId":138339,"journal":{"name":"2020 IEEE International RF and Microwave Conference (RFM)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127582133","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
Caustic Analysis of Reflected Rays from a Spherical Reflector Antenna 球面反射面天线反射射线的焦散分析
2020 IEEE International RF and Microwave Conference (RFM) Pub Date : 2020-12-14 DOI: 10.1109/RFM50841.2020.9344797
K. Quzwain, Ayuni Afiqah Arjunaidi, Yoshihide Yamada, K. Kamardin, N. Rahman, A. Ismail, N. Dinh
{"title":"Caustic Analysis of Reflected Rays from a Spherical Reflector Antenna","authors":"K. Quzwain, Ayuni Afiqah Arjunaidi, Yoshihide Yamada, K. Kamardin, N. Rahman, A. Ismail, N. Dinh","doi":"10.1109/RFM50841.2020.9344797","DOIUrl":"https://doi.org/10.1109/RFM50841.2020.9344797","url":null,"abstract":"Now, 5G mobile system is developing to increase user capacity and reduce connection latency. At radio wave technology, new challenges such as millimeter wave (28GHz), small cell size and multi beam base station are introduced. At millimeter wave, where antenna size becomes small size of almost 30cm, a reflector antenna becomes promising. In order to use a reflector antenna for multi beam application, a spherical reflector is suitable. However, a spherical reflector has a problem of distributed caustics. In designing antenna, to clarify caustic positions is important. In this paper, the caustic position equation is derived. Accuracy of the equation is ensured by comparing with MATLAB simulation results. Finally, useful data for dual spherical reflector designing is obtained.","PeriodicalId":138339,"journal":{"name":"2020 IEEE International RF and Microwave Conference (RFM)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114597276","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
Wearable Social Distancing Detection System 可穿戴社交距离检测系统
2020 IEEE International RF and Microwave Conference (RFM) Pub Date : 2020-12-14 DOI: 10.1109/RFM50841.2020.9344786
F.A Ahmad Naqiyuddin, W. Mansor, N. M. Sallehuddin, M. N. S. Mohd Johari, M. A. S. Shazlan, A. N. Bakar
{"title":"Wearable Social Distancing Detection System","authors":"F.A Ahmad Naqiyuddin, W. Mansor, N. M. Sallehuddin, M. N. S. Mohd Johari, M. A. S. Shazlan, A. N. Bakar","doi":"10.1109/RFM50841.2020.9344786","DOIUrl":"https://doi.org/10.1109/RFM50841.2020.9344786","url":null,"abstract":"The conventional method of keeping people at a safe distance in the Covid-19 Standard Operating System could not ensure everyone obeys the rule. An automatic social distancing system needs to be created to assist and train individuals to stay at a safe distance of at least 1 m. This paper proposes a wearable social distancing detector that uses a microcontroller with an ultrasonic sensor to detect the distance between two persons and provides a warning if the person fails to obey the rule. The system could perform social distancing detection accurately and can assist in the movement of people in an area. Index Terms - ultrasonic sensor, Covid-19, physical distancing, ARM microcontroller","PeriodicalId":138339,"journal":{"name":"2020 IEEE International RF and Microwave Conference (RFM)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130891051","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: 9
A Compact SRR Loaded Dual Band Antenna with Modified Ground for WLAN/WiMAX Applications 一种适用于WLAN/WiMAX应用的带有改良接地的紧凑SRR负载双频天线
2020 IEEE International RF and Microwave Conference (RFM) Pub Date : 2020-12-14 DOI: 10.1109/RFM50841.2020.9344749
S. Toshniwal, Amit Prajapati, Ritesh Sarswat, Lokesh Kulhari, Sayong Rawat, Riduan Ahmad, B. Ahmad, K. Ray
{"title":"A Compact SRR Loaded Dual Band Antenna with Modified Ground for WLAN/WiMAX Applications","authors":"S. Toshniwal, Amit Prajapati, Ritesh Sarswat, Lokesh Kulhari, Sayong Rawat, Riduan Ahmad, B. Ahmad, K. Ray","doi":"10.1109/RFM50841.2020.9344749","DOIUrl":"https://doi.org/10.1109/RFM50841.2020.9344749","url":null,"abstract":"A design has been performed using compact dual band, planar, rectangular printed antenna for WLAN/WiMAX applications. The proposed antenna achieved dual frequency bands by loading modified SRR with inverted π shaped DGS. By using the defective ground plane with inverted π structure slot, the designed antenna resonates at dual frequencies. The first resonant frequency is shown at 3.5 GHz (in between the band 3.119 GHz – 4.13 GHz) with maximum return loss of −22.485 dB which is WiMAX frequency band. The second resonant frequency is shown at 5.8 GHz (in between the band 5.725 GHz −6.108 GHz) with maximum return loss of −15.6 dB which is WLAN frequency band. These bands are assigned to the IEEE 802.11a/b/g and IEEE 802.16e standards. The proposed design of antenna is fabricated with a compact size of 30 mm x 30 mm. The patch antenna is designed as per required standards for WLAN and WiMAX and its return loss and VSWR plots are admitted. CST Microwave Studio is considered for designing with slotted partial ground, stairs and stubs and optimization. Special configuration has been performed to get better results.","PeriodicalId":138339,"journal":{"name":"2020 IEEE International RF and Microwave Conference (RFM)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116579107","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
Selection of Suitable Feeding Mechanism for Maximum Gain in Reflectarrays 反射镜增益最大化的馈入机构选择
2020 IEEE International RF and Microwave Conference (RFM) Pub Date : 2020-12-14 DOI: 10.1109/RFM50841.2020.9344775
M. H. Dahri, M. Jamaluddin, F. Seman, M. Kamarudin
{"title":"Selection of Suitable Feeding Mechanism for Maximum Gain in Reflectarrays","authors":"M. H. Dahri, M. Jamaluddin, F. Seman, M. Kamarudin","doi":"10.1109/RFM50841.2020.9344775","DOIUrl":"https://doi.org/10.1109/RFM50841.2020.9344775","url":null,"abstract":"Feeding is a very crucial part in performance analysis of reflectarray antenna. A suitable type, position and distance of the feed in reflectarray can be selected to attain a desirable result. In this paper, a center feed reflectarray of 332 square patch elements is selected to find its suitable feed with proper distance for maximum gain performance at 26 GHz. The analysis is performed with three different horn feeds of 10dB, 15dB and 20dB gain. Additionally, the feed distance (f) with respect to the reflectarray size (D) is varied from 0.4D to 1.3D. It is observed that, the each feed offers a maximum gain at a different distance, even though the reflectarray is initially designed at a feed distance of 1D. The 10dB, 15dB and 20dB feeds offer their respective maximum gains at a feed distance of 0.8D, 0.9D and 0.5D respectively. Simulated results have been verified with measurements where a maximum measured reflectarray gain of 27.3dB has been obtained with a 10dB horn feed at a distance of 0.8D.","PeriodicalId":138339,"journal":{"name":"2020 IEEE International RF and Microwave Conference (RFM)","volume":"257 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117029736","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 Dual-Band Frequency Reconfigurable Antenna Array Based on Reconfigurable Defected Ground Structure 一种基于可重构缺陷地结构的双频可重构天线阵列
2020 IEEE International RF and Microwave Conference (RFM) Pub Date : 2020-12-14 DOI: 10.1109/RFM50841.2020.9344790
K. Ahmad, M. Aziz, N. Abdullah
{"title":"A Dual-Band Frequency Reconfigurable Antenna Array Based on Reconfigurable Defected Ground Structure","authors":"K. Ahmad, M. Aziz, N. Abdullah","doi":"10.1109/RFM50841.2020.9344790","DOIUrl":"https://doi.org/10.1109/RFM50841.2020.9344790","url":null,"abstract":"Reconfigurable antenna array has gained considerable interest in nowadays wireless communication systems. In this article is proposed, a simple structure of a dual-patch element antenna array incorporated three semicircles-defected ground structures to achieve a wideband microstrip antenna array with frequency reconfigurable. For the feeding network, the T-junction power divider approach used. In the simulation, RF switches are considered as copper tracks and are inserted in the defected ground structure slots to reconfigure the frequency. The proposed antenna array operates in dual bands with frequency reconfigurable properties for application in the C -band (6.91-7.49 GHz) and (7.03-7.67 GHz). Hence, antenna array works in dual switching states: ON and OFF.","PeriodicalId":138339,"journal":{"name":"2020 IEEE International RF and Microwave Conference (RFM)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131769759","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: 2
Practical Considerations for the CW Power Amplifier Design for Lower Hybrid Frequency Applications 低混合频率连续波功率放大器设计的实际考虑
2020 IEEE International RF and Microwave Conference (RFM) Pub Date : 2020-12-14 DOI: 10.1109/RFM50841.2020.9344753
Sandeep R. Sainkar, A. Cheeran, G. Shinde, P. K. Sharma, H. Dixit
{"title":"Practical Considerations for the CW Power Amplifier Design for Lower Hybrid Frequency Applications","authors":"Sandeep R. Sainkar, A. Cheeran, G. Shinde, P. K. Sharma, H. Dixit","doi":"10.1109/RFM50841.2020.9344753","DOIUrl":"https://doi.org/10.1109/RFM50841.2020.9344753","url":null,"abstract":"The paper discusses the practical design considerations for a continuous wave power amplifier operating at 3.7 GHz. It describes several issues such as layout routing, selection of components, tolerance etc. The paper suggests appropriate measures for the development of a realistic circuit of a power amplifier. The simulated results show an output power of 45.3 dBm for an efficiency of 50 %. The measured results are comparable and would be further optimized.","PeriodicalId":138339,"journal":{"name":"2020 IEEE International RF and Microwave Conference (RFM)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127226968","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
Microstrip Rectangular Inset-Fed Patch Array Antenna for WiMax Application 用于WiMax的微带矩形插入馈电贴片阵列天线
2020 IEEE International RF and Microwave Conference (RFM) Pub Date : 2020-12-14 DOI: 10.1109/RFM50841.2020.9344799
N. Wahab, S. Nordin, W. N. W. Muhamad, S. S. Sarnin
{"title":"Microstrip Rectangular Inset-Fed Patch Array Antenna for WiMax Application","authors":"N. Wahab, S. Nordin, W. N. W. Muhamad, S. S. Sarnin","doi":"10.1109/RFM50841.2020.9344799","DOIUrl":"https://doi.org/10.1109/RFM50841.2020.9344799","url":null,"abstract":"This paper discussed on the rectangular patch antenna designs and performances using inset-fed feeding technique. Two antenna arrangements are presented with the first one is using basic rectangular patch while the second antenna is based on 4×1 array with corporate feeding arrangement. Both antennas are designed at 2.5 GHz, on microstrip substrate, type FR4 with dielectric constant, $varepsilon_{r}=4.3$ and thickness of h = 1.6mm. The antennas are simulated using CST Microwave Studio software and fabricated to validate the work. The performances are measured in terms of return loss, gain, and directivity and are found agreeable with simulations. It was found that the array antenna has successfully increased the gain 4 times higher and improved directivity compared to the single patch antenna making it a good candidate for wireless and WiMax applications.","PeriodicalId":138339,"journal":{"name":"2020 IEEE International RF and Microwave Conference (RFM)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126201029","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: 4
PCL-BPF using Different Types of Defected Ground Structure (DGS) in Microwave Applications 利用不同类型缺陷接地结构(DGS)的PCL-BPF在微波中的应用
2020 IEEE International RF and Microwave Conference (RFM) Pub Date : 2020-12-14 DOI: 10.1109/rfm50841.2020.9344732
Syaza Syafiqah bt Zaidan, Dayang Azra binti Awang Mat, K. H. Hong Ping, S. Sahrani, Dyg Norkhairunnisa bt Abang Zaidel
{"title":"PCL-BPF using Different Types of Defected Ground Structure (DGS) in Microwave Applications","authors":"Syaza Syafiqah bt Zaidan, Dayang Azra binti Awang Mat, K. H. Hong Ping, S. Sahrani, Dyg Norkhairunnisa bt Abang Zaidel","doi":"10.1109/rfm50841.2020.9344732","DOIUrl":"https://doi.org/10.1109/rfm50841.2020.9344732","url":null,"abstract":"This paper presents the analysis on different types of DGS on parallel coupled line filter for microwave applications. The filter is design using Rogers RO4003C as its substrate with thickness of 0.813mm and dielectric permittivity of 3.38. Different DGS types are chosen to investigate its effect towards the filter's performances. The simulation is done using Advance Design System (ADS) V2020 and measured using R&S Vector Network Analyzer. It shows that the parallel coupled line filter with H-shaped type, resulted reduction in size and enhancement of both insertion and return loss compare to conventional parallel line coupled filter. The filter is then fabricated with the size of 18.017mm×22.036mm, and gave the results of measured return loss, 20.238dB and insertion loss of 1.412dB compare to conventional design, with the size of 18.553mm×26.930mm with return loss of 11.042dB and insertion loss of 1.781dB respectively.","PeriodicalId":138339,"journal":{"name":"2020 IEEE International RF and Microwave Conference (RFM)","volume":"464 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123652872","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
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