Pub Date : 2020-08-26DOI: 10.1109/iWEM49354.2020.9237421
Chi-Fang Huang, Yi-Hung Hsu, Li-Cheng Hsiao
This paper demonstrates a design technique of an accurate contactless voltage probe. The basic theory of electrostatic field for this design is mentioned firstly. Then, for accurate measurement and EMI consideration, a dedicate electrode, a filtering and amplifying circuit, and a shielding chamber are designed. Measured signal by this device is also presented as a method confirmation.
{"title":"Design of an Accurate Contactless Voltage Probe Including a Signal Processing Circuit","authors":"Chi-Fang Huang, Yi-Hung Hsu, Li-Cheng Hsiao","doi":"10.1109/iWEM49354.2020.9237421","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237421","url":null,"abstract":"This paper demonstrates a design technique of an accurate contactless voltage probe. The basic theory of electrostatic field for this design is mentioned firstly. Then, for accurate measurement and EMI consideration, a dedicate electrode, a filtering and amplifying circuit, and a shielding chamber are designed. Measured signal by this device is also presented as a method confirmation.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"195 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121740994","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}
In this paper we propose an all-pass design of three section branch line structure. Based on three-section branch line structure, we derive the corresponding formula with the required circuit conditions and create charts for the design. A prototype operating at 2.45GHz is designed, simulated, fabricated and measured to verify the validity of the design procedure.
{"title":"An All-Pass Design of a Three-section Branch Line Structure","authors":"Yu-hsiang Chou, Nadiah Alhusna Pramudya, Jan-Dong Tseng","doi":"10.1109/iWEM49354.2020.9237442","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237442","url":null,"abstract":"In this paper we propose an all-pass design of three section branch line structure. Based on three-section branch line structure, we derive the corresponding formula with the required circuit conditions and create charts for the design. A prototype operating at 2.45GHz is designed, simulated, fabricated and measured to verify the validity of the design procedure.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123464275","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 : 2020-08-26DOI: 10.1109/iWEM49354.2020.9237446
C. Lin, Hsuan-Fu Wang, Hai Zhou
This paper revealed an effective method to judge the quality levels of apples with optical images which could avoid the damages caused by touching measurement. When only using photographs of the apples, the quality levels cannot be effectively identified via auto optical inspection methods. We proposed a structured light projection system for detecting the apple surface topography which is corresponding to the small changes during storage periods. This system uses cosine waves with different phases to project onto the apple surface and then uses three phases to reconstruct the object. In order to get the most suitable spatial frequency for this system, we tested six spatial frequencies: f = 0.001, f = 0.003, f = 0.005, f = 0.008, f = 0.01, and f = 0.08. Test results show that the spatial frequency f = 0.008 is best for our samples and hardware equipment. A convolutional neural network modified from LeNet is used to classify both the pictures: directly captured from apples and the reconstructed pictures from the structured lighting system. Experiments were performed on 30 fresh apples which then storage for a period of 7 days, 14 days and 21 days. The results of the convolutional neural network trained on structured light system samples showed that the accuracy was 87%, but the accuracy of the results of only using photography of apples was just 46%.
本文提出了一种利用光学图像判断苹果质量水平的有效方法，避免了触摸测量造成的损害。当仅使用苹果的照片时，通过自动光学检测方法无法有效识别质量水平。我们提出了一种用于检测苹果表面形貌的结构光投影系统，该系统与苹果在贮藏期间的微小变化相对应。该系统使用不同相位的余弦波投射到苹果表面，然后使用三个相位重建物体。为了得到最适合该系统的空间频率，我们测试了6个空间频率:f = 0.001, f = 0.003, f = 0.005, f = 0.008, f = 0.01和f = 0.08。测试结果表明，空间频率f = 0.008最适合我们的样品和硬件设备。使用LeNet改进的卷积神经网络对直接从苹果中捕获的图像和从结构化照明系统中重建的图像进行分类。实验以30个新鲜苹果为研究对象，分别保存7天、14天和21天。在结构光系统样本上训练的卷积神经网络的结果表明，准确率为87%，但仅使用苹果照片的结果准确率仅为46%。
{"title":"A study of measurement technology based on Structured Light Detection and Deep Learning","authors":"C. Lin, Hsuan-Fu Wang, Hai Zhou","doi":"10.1109/iWEM49354.2020.9237446","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237446","url":null,"abstract":"This paper revealed an effective method to judge the quality levels of apples with optical images which could avoid the damages caused by touching measurement. When only using photographs of the apples, the quality levels cannot be effectively identified via auto optical inspection methods. We proposed a structured light projection system for detecting the apple surface topography which is corresponding to the small changes during storage periods. This system uses cosine waves with different phases to project onto the apple surface and then uses three phases to reconstruct the object. In order to get the most suitable spatial frequency for this system, we tested six spatial frequencies: f = 0.001, f = 0.003, f = 0.005, f = 0.008, f = 0.01, and f = 0.08. Test results show that the spatial frequency f = 0.008 is best for our samples and hardware equipment. A convolutional neural network modified from LeNet is used to classify both the pictures: directly captured from apples and the reconstructed pictures from the structured lighting system. Experiments were performed on 30 fresh apples which then storage for a period of 7 days, 14 days and 21 days. The results of the convolutional neural network trained on structured light system samples showed that the accuracy was 87%, but the accuracy of the results of only using photography of apples was just 46%.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133636854","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 : 2020-08-26DOI: 10.1109/iWEM49354.2020.9237436
He-Tsung Hung, H. Su
This article proposes an uniplanar antenna operating in the LTE 900/1800/2600 and the WLAN-2.4/-5.2 bands for the laptop applications. The size of this antenna is 45 ×9 × 0.8 mm3 and it fabricated on a FR4 glass epoxy substrate. This antenna is mounted on the 260 × 200 × 0.1 mm3 copper sheet. The efficiency and peak gain are 31-81% and −0.05–5 dBi, respectively.
{"title":"An Uniplanar Multi-bands Antenna For The Laptop Applications","authors":"He-Tsung Hung, H. Su","doi":"10.1109/iWEM49354.2020.9237436","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237436","url":null,"abstract":"This article proposes an uniplanar antenna operating in the LTE 900/1800/2600 and the WLAN-2.4/-5.2 bands for the laptop applications. The size of this antenna is 45 ×9 × 0.8 mm3 and it fabricated on a FR4 glass epoxy substrate. This antenna is mounted on the 260 × 200 × 0.1 mm3 copper sheet. The efficiency and peak gain are 31-81% and −0.05–5 dBi, respectively.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133262414","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 : 2020-08-26DOI: 10.1109/iWEM49354.2020.9237413
Chih-Chung Lin, D. Lin, Chin-Cheng Chien
A novel dual band open loop antenna refers to a slot and an inverted-L ground (Inverted-L) between the main resonant radiating elements connected to two radiating metal elements. short-line), and is directly printed on a FR4 PCB board substrate, so that the antenna can obtain dual frequency operating frequency. It contains a parallel bent main resonant radiating element connected to the feeding end, which can be adjusted to the size of the radiating element by changing the quarter-wavelength based on A high-frequency operating frequency band and an inverted-L short-line radiating element. One end of a rectangular metal element is connected to the main common-amplitude radiation metal element, and the other end is provided with a parallel slot and Inverted-L short-line radiating elements are coupled to obtain a low-frequency operating frequency band; and the gap of this parallel slot is exactly 0.01λ wavelength of the operating frequency, and the coupling part radiation pattern. The surface current generated by the loop is used to increase the antenna operating bandwidth (Bandwidth), so that the antenna can obtain dual-band operating bandwidth and good antenna gain.
{"title":"Dual Band Compact Open Loop Antenna Design for Wireless Local Area Network","authors":"Chih-Chung Lin, D. Lin, Chin-Cheng Chien","doi":"10.1109/iWEM49354.2020.9237413","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237413","url":null,"abstract":"A novel dual band open loop antenna refers to a slot and an inverted-L ground (Inverted-L) between the main resonant radiating elements connected to two radiating metal elements. short-line), and is directly printed on a FR4 PCB board substrate, so that the antenna can obtain dual frequency operating frequency. It contains a parallel bent main resonant radiating element connected to the feeding end, which can be adjusted to the size of the radiating element by changing the quarter-wavelength based on A high-frequency operating frequency band and an inverted-L short-line radiating element. One end of a rectangular metal element is connected to the main common-amplitude radiation metal element, and the other end is provided with a parallel slot and Inverted-L short-line radiating elements are coupled to obtain a low-frequency operating frequency band; and the gap of this parallel slot is exactly 0.01λ wavelength of the operating frequency, and the coupling part radiation pattern. The surface current generated by the loop is used to increase the antenna operating bandwidth (Bandwidth), so that the antenna can obtain dual-band operating bandwidth and good antenna gain.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"233 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116157073","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 : 2020-08-26DOI: 10.1109/iWEM49354.2020.9237450
Yinfeng Xia, Yingsong Li, Wei Xue, X. Liu
In this paper, an asymmetric coplanar strip (ACS) fed microstrip antenna is proposed, which is matched by an active circuit to increase the bandwidth. The proposed antenna is composed of feeding line, asymmetric ground plane, rectangle radiation patch. The antenna operates at 384 MHz and 645 MHz with a small fractional bandwidth of 19.2% and 18%, respectively, when the active circuit is not incorporated into the antenna matching network. By properly designing and optimizing the active circuit, the bandwidth has been greatly enhanced and a −10 dB fractional bandwidth of 197.7% from 5 MHz to 877 MHz has been achieved for the proposed antenna system.
{"title":"An ACS-fed Super Wideband Active Antenna","authors":"Yinfeng Xia, Yingsong Li, Wei Xue, X. Liu","doi":"10.1109/iWEM49354.2020.9237450","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237450","url":null,"abstract":"In this paper, an asymmetric coplanar strip (ACS) fed microstrip antenna is proposed, which is matched by an active circuit to increase the bandwidth. The proposed antenna is composed of feeding line, asymmetric ground plane, rectangle radiation patch. The antenna operates at 384 MHz and 645 MHz with a small fractional bandwidth of 19.2% and 18%, respectively, when the active circuit is not incorporated into the antenna matching network. By properly designing and optimizing the active circuit, the bandwidth has been greatly enhanced and a −10 dB fractional bandwidth of 197.7% from 5 MHz to 877 MHz has been achieved for the proposed antenna system.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121185058","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}
This paper proposes a co-planar waveguide (CPW) for GNSS fed circularly polarized antenna, which mainly contributes to proper slotting and implantation of metal stubs on the ground plane to control impedance matching and axial ratio. By embedding two slots in the monopole antenna, it can achieve better impedance matching. In addition, an L-shaped slot is buried in the ground plane and a T-shaped stump is added. Combined with its own ground structure, it helps the antenna to excite an electric field with a phase difference of 90 degrees and equal amplitude at high frequency to achieve a circle polarized radiation characteristics. The antenna proposed in this paper uses FR4 as the substrate, and its antenna size is 55 × 55 × 1.6 mm3, and can cover the global navigation system (GNSS E1/L1/G1) and WiFi 2.45 GHz operating band.
{"title":"Coplanar Antenna Design for GNSS and WiFi Applications","authors":"Chih-Chiang Chen, Zei-Wei Huang, Kai-Hong Jheng, Zhi-De Lin, C. Sim, Horng-Dean Chen","doi":"10.1109/iWEM49354.2020.9237405","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237405","url":null,"abstract":"This paper proposes a co-planar waveguide (CPW) for GNSS fed circularly polarized antenna, which mainly contributes to proper slotting and implantation of metal stubs on the ground plane to control impedance matching and axial ratio. By embedding two slots in the monopole antenna, it can achieve better impedance matching. In addition, an L-shaped slot is buried in the ground plane and a T-shaped stump is added. Combined with its own ground structure, it helps the antenna to excite an electric field with a phase difference of 90 degrees and equal amplitude at high frequency to achieve a circle polarized radiation characteristics. The antenna proposed in this paper uses FR4 as the substrate, and its antenna size is 55 × 55 × 1.6 mm3, and can cover the global navigation system (GNSS E1/L1/G1) and WiFi 2.45 GHz operating band.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115401069","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 : 2020-08-26DOI: 10.1109/iWEM49354.2020.9237419
Yuka Shinozaki, H. Arai
In this paper, a NON-reciprocal spatial bandpass filter (BPF) is proposed. That contains magnetized ferrites like conventional isolators and has different transmission coefficient depending on the incident direction of the plane wave. Depending on the incident direction of the incident wave, the transition coefficients were −5.8 dB and −11.3 dB, and the power ratio was approximately 3.5 times.
{"title":"A Study of NON-reciprocal Spatial Band Pass Filter","authors":"Yuka Shinozaki, H. Arai","doi":"10.1109/iWEM49354.2020.9237419","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237419","url":null,"abstract":"In this paper, a NON-reciprocal spatial bandpass filter (BPF) is proposed. That contains magnetized ferrites like conventional isolators and has different transmission coefficient depending on the incident direction of the plane wave. Depending on the incident direction of the incident wave, the transition coefficients were −5.8 dB and −11.3 dB, and the power ratio was approximately 3.5 times.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"188 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123208610","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 : 2020-08-26DOI: 10.1109/iWEM49354.2020.9237423
Tzong-Dar Wu, Zhi-Jun Chen, Chung-Cheng Chang, Hsuan-Fu Wang
This paper presents the design of a remote monitoring system for open ocean aquaculture, which is based on the integration of two long-range wireless communication technologies: the IEEE 802.11ac wireless bridge and the LoRa-Android embedded system. The system is composed of sensors and underwater camera that can measure the seawater quality and observe the fish behavior in aquaculture cages in real time. The sensor and video electrical cables were connected to the watertight control unit attached to the upper frame of the cage with stainless steel brackets and wire rope. The sensor data and video recorded in control unit were sent to the remote data center located on land by LoRa wireless module and IEEE 802.11ac wireless bridge, respectively. Finally, all these data were uploaded to NTOU (National Taiwan Ocean University) Cloud center. To extend the system run time for the daily operation period under the fixed battery capacity, a remote relay controller has been used in the watertight control unit. The entire system can be shut down by remote commands except the relay itself and the wireless subsystem. In addition, the wireless subsystem can be turned off by setting a periodic wake-up time in the relay controller for power saving. The preliminary experiment was performed at Gongliao in New Taipei City to test the proposed system. After successful testing, the whole system has been setup at the fish farm at Pingtung for long-term testing. The experiment results show that the proposed wireless sensor network has good suitability and sustainability when applied in the field of open ocean aquaculture.
{"title":"Design of a Wireless Sensor Network for Open Ocean Aquaculture Based on 802.11 ac Wireless Bridge and LoRa™ Technology","authors":"Tzong-Dar Wu, Zhi-Jun Chen, Chung-Cheng Chang, Hsuan-Fu Wang","doi":"10.1109/iWEM49354.2020.9237423","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237423","url":null,"abstract":"This paper presents the design of a remote monitoring system for open ocean aquaculture, which is based on the integration of two long-range wireless communication technologies: the IEEE 802.11ac wireless bridge and the LoRa-Android embedded system. The system is composed of sensors and underwater camera that can measure the seawater quality and observe the fish behavior in aquaculture cages in real time. The sensor and video electrical cables were connected to the watertight control unit attached to the upper frame of the cage with stainless steel brackets and wire rope. The sensor data and video recorded in control unit were sent to the remote data center located on land by LoRa wireless module and IEEE 802.11ac wireless bridge, respectively. Finally, all these data were uploaded to NTOU (National Taiwan Ocean University) Cloud center. To extend the system run time for the daily operation period under the fixed battery capacity, a remote relay controller has been used in the watertight control unit. The entire system can be shut down by remote commands except the relay itself and the wireless subsystem. In addition, the wireless subsystem can be turned off by setting a periodic wake-up time in the relay controller for power saving. The preliminary experiment was performed at Gongliao in New Taipei City to test the proposed system. After successful testing, the whole system has been setup at the fish farm at Pingtung for long-term testing. The experiment results show that the proposed wireless sensor network has good suitability and sustainability when applied in the field of open ocean aquaculture.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131448175","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 : 2020-08-26DOI: 10.1109/iWEM49354.2020.9237406
I. Chen, C. Peng, Hsiang-An Liu, You-ming Chen
A 4×4 MIMO antenna for 5G NR mobile handsets application is proposed in this article. A monopole antenna joints with loop antenna, edge perturbation and asymmetric co-planar waveguide (ACPW) feeding structure is designed to be operated in 5G NR FR1 (3300MHz-3600MHz and 4800MHz-5000MHz) bands. A prototype of the proposed antenna with 10.2 mm in length and 2.8 mm in width is fabricated and investigated experimentally. The polarization diversity is used to arrange the four antennas setup. The experimental results indicate that the isolation (S21) between the antennas is more than 20dB, and the envelope correlation coefficient (ECC) is less than 0.02. The specific absorption rate (SAR) for an input power of 23dBm in 5G NR FR1 band meet the SAR limit of 1.6 mW/g of FCC regulatory limit.
本文提出了一种适用于5G NR手机应用的4×4 MIMO天线。设计了一种环形天线、边缘摄动和非对称共面波导馈电结构的单极天线接头，工作在5G NR FR1 (3300MHz-3600MHz和4800MHz-5000MHz)频段。制作了长10.2 mm、宽2.8 mm的天线样机并进行了实验研究。利用极化分集对四根天线进行布置。实验结果表明，天线间的隔离度(S21)大于20dB，包络相关系数(ECC)小于0.02。在5G NR FR1频段输入功率为23dBm时，比吸收率(SAR)满足FCC规定的1.6 mW/g的SAR限值。
{"title":"4×4 MIMO antenna design for 5G NR FR1 mobile handset applications","authors":"I. Chen, C. Peng, Hsiang-An Liu, You-ming Chen","doi":"10.1109/iWEM49354.2020.9237406","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237406","url":null,"abstract":"A 4×4 MIMO antenna for 5G NR mobile handsets application is proposed in this article. A monopole antenna joints with loop antenna, edge perturbation and asymmetric co-planar waveguide (ACPW) feeding structure is designed to be operated in 5G NR FR1 (3300MHz-3600MHz and 4800MHz-5000MHz) bands. A prototype of the proposed antenna with 10.2 mm in length and 2.8 mm in width is fabricated and investigated experimentally. The polarization diversity is used to arrange the four antennas setup. The experimental results indicate that the isolation (S21) between the antennas is more than 20dB, and the envelope correlation coefficient (ECC) is less than 0.02. The specific absorption rate (SAR) for an input power of 23dBm in 5G NR FR1 band meet the SAR limit of 1.6 mW/g of FCC regulatory limit.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117248619","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}
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