Pub Date : 2020-08-26DOI: 10.1109/iwem49354.2020.9237429
Shunichi Kaneoka, Wataru Iida, Hiroshi Hashiguchi, T. Baba, H. Arai
This paper presents the comparison of optical leaky waveguide antenna, i.e., grating waveguide (GWG), waffle waveguide (WWG) and waffle-iron waveguide (WIWG) by the optical experiment.
{"title":"Experimental evaluation on optical leaky waveguide antenna by waffle-iron structure","authors":"Shunichi Kaneoka, Wataru Iida, Hiroshi Hashiguchi, T. Baba, H. Arai","doi":"10.1109/iwem49354.2020.9237429","DOIUrl":"https://doi.org/10.1109/iwem49354.2020.9237429","url":null,"abstract":"This paper presents the comparison of optical leaky waveguide antenna, i.e., grating waveguide (GWG), waffle waveguide (WWG) and waffle-iron waveguide (WIWG) by the optical experiment.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"1 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":"129941256","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/iWEM49354.2020.9237454
Kevin Chen
Wireless communication development is based on the needed information transferred by the user demands. Thus the verification for this purpose is always required between the system provider and users. There are many testing requirements dealing with performance issue for specific technology. We are here to make an overview on these requirements and try to conclude and summarize the key characteristics to be verified. Hope this make it simplifier for third party to support industry to develop the performance verification in an effective way.
{"title":"Overview of the Performance Verification for Wireless Communication System : * Note: Sub-titles are not captured in Xplore and should not be used","authors":"Kevin Chen","doi":"10.1109/iWEM49354.2020.9237454","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237454","url":null,"abstract":"Wireless communication development is based on the needed information transferred by the user demands. Thus the verification for this purpose is always required between the system provider and users. There are many testing requirements dealing with performance issue for specific technology. We are here to make an overview on these requirements and try to conclude and summarize the key characteristics to be verified. Hope this make it simplifier for third party to support industry to develop the performance verification in an effective way.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"152 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":"115988870","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/iWEM49354.2020.9237448
Y. Cheng, Chia-Wei Hsu, Chien‐Jen Wang
In this work, we have successfully designed and fabricated a triple-band grounded radiation antenna for applications of the multiple-system integration. An eight-like-loop slit is embedded in the ground. An eight-like-loop slit is etched in the ground plane to excite multiple resonant modes. Additionally, by embedding two rectangular slots at two terminals of the eight-like-loop slit, the capacitance of the ground plane resonator decreases such that the impedance matching condition in the upper-frequency band can be improved. Finally, a triple-band frequency response is derived by etching a simple matching circuit. The proposed antenna achieves the measured impedance bandwidths from 1.02 to 1.06, from 1.35 to 1.62, and from 1.96 to 2.55 GHz.
{"title":"A Triple-Band Slot Antenna by Using Balun Excitation and Ground Radiation","authors":"Y. Cheng, Chia-Wei Hsu, Chien‐Jen Wang","doi":"10.1109/iWEM49354.2020.9237448","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237448","url":null,"abstract":"In this work, we have successfully designed and fabricated a triple-band grounded radiation antenna for applications of the multiple-system integration. An eight-like-loop slit is embedded in the ground. An eight-like-loop slit is etched in the ground plane to excite multiple resonant modes. Additionally, by embedding two rectangular slots at two terminals of the eight-like-loop slit, the capacitance of the ground plane resonator decreases such that the impedance matching condition in the upper-frequency band can be improved. Finally, a triple-band frequency response is derived by etching a simple matching circuit. The proposed antenna achieves the measured impedance bandwidths from 1.02 to 1.06, from 1.35 to 1.62, and from 1.96 to 2.55 GHz.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"37 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":"115998109","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/iwem49354.2020.9237441
{"title":"Copyright","authors":"","doi":"10.1109/iwem49354.2020.9237441","DOIUrl":"https://doi.org/10.1109/iwem49354.2020.9237441","url":null,"abstract":"","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":"122518365","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/iWEM49354.2020.9237416
I. Huang, Chin-Lung Liao, Shih-Yuan Chen
This paper presents a dual-linearly-polarized printed dual-dipole antenna array and its polarimetric radar system application. A 5×5 antenna array with a 3-D feeding circuit for S-band is designed, fabricated, and tested. For the array, the half-power beamwidth is around 20 degrees with a gain of 16.1±0.8 dBi and 15.75±0.75 dBi for the x- and y-polarized sub-arrays, respectively, from 3.1 GHz to 3.5 GHz. The efficiency is larger than 60% and 69% for the x- and y-polarized sub-arrays, respectively.
{"title":"Dual-Linearly-Polarized Printed Dual-Dipole Antenna Array for Polarimetric Radar Application","authors":"I. Huang, Chin-Lung Liao, Shih-Yuan Chen","doi":"10.1109/iWEM49354.2020.9237416","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237416","url":null,"abstract":"This paper presents a dual-linearly-polarized printed dual-dipole antenna array and its polarimetric radar system application. A 5×5 antenna array with a 3-D feeding circuit for S-band is designed, fabricated, and tested. For the array, the half-power beamwidth is around 20 degrees with a gain of 16.1±0.8 dBi and 15.75±0.75 dBi for the x- and y-polarized sub-arrays, respectively, from 3.1 GHz to 3.5 GHz. The efficiency is larger than 60% and 69% for the x- and y-polarized sub-arrays, respectively.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"84 1 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":"127979738","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/iWEM49354.2020.9237452
Chih-Hung Lee, D. Lin, Hsin-Piao Lin
In this paper, we proposed a new design AC voltage probe for EMI AC conduction pretest and debug. This AC voltage probe has a strong positive correlation with the results of LISN. It can be used for the designers and engineers to check if the product can meet the limit of AC conducted noises before the final test. The different type and value capacitors were applied for this probe and the best configuration was found in the study. The proposed structure has been implemented for the conducted emissions measurement from 150 kHz to 30 MHz, which is verified to fulfill the preliminary test of DUT. This probe is simple and useful for AC conduction pretest in the stage of design, and it is also a low-cost and effective tool for EMI AC conduction problems diagnosis and debug.
{"title":"A New Design of AC Voltage Probe for EMI Conducted Emission Measurement","authors":"Chih-Hung Lee, D. Lin, Hsin-Piao Lin","doi":"10.1109/iWEM49354.2020.9237452","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237452","url":null,"abstract":"In this paper, we proposed a new design AC voltage probe for EMI AC conduction pretest and debug. This AC voltage probe has a strong positive correlation with the results of LISN. It can be used for the designers and engineers to check if the product can meet the limit of AC conducted noises before the final test. The different type and value capacitors were applied for this probe and the best configuration was found in the study. The proposed structure has been implemented for the conducted emissions measurement from 150 kHz to 30 MHz, which is verified to fulfill the preliminary test of DUT. This probe is simple and useful for AC conduction pretest in the stage of design, and it is also a low-cost and effective tool for EMI AC conduction problems diagnosis and debug.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"1 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":"131060379","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/iWEM49354.2020.9237420
Yu-Cong Wang, Chih-Cheng Li, You-sheng Li, S. Wu
This paper simulates and verifies the conducted interference of EMI on the basis of four-layer template, and proposes to suppress the noise by destroying the resonant cavity or the return current. One suppression proposal which designs a planar passive circuit, which is placed on the metal plane of the resonant cavity, forming a special pattern, it can be a filter, transformer or divider, suppressing noise at a specific frequency, the other one is using the differential signal. Finally, we mainly using HFSS to simulate the scattering parameters of the top transmission line and the line of differential signal to verify the EMI effect on the four-layer template.
{"title":"Simulating and verifying the electromagnetic interference on the four-layer PCB","authors":"Yu-Cong Wang, Chih-Cheng Li, You-sheng Li, S. Wu","doi":"10.1109/iWEM49354.2020.9237420","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237420","url":null,"abstract":"This paper simulates and verifies the conducted interference of EMI on the basis of four-layer template, and proposes to suppress the noise by destroying the resonant cavity or the return current. One suppression proposal which designs a planar passive circuit, which is placed on the metal plane of the resonant cavity, forming a special pattern, it can be a filter, transformer or divider, suppressing noise at a specific frequency, the other one is using the differential signal. Finally, we mainly using HFSS to simulate the scattering parameters of the top transmission line and the line of differential signal to verify the EMI effect on the four-layer template.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"12 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":"124094747","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/iWEM49354.2020.9237422
Tzong-Dar Wu, Yuting Yen, J. H. Wang, R. Huang, Hung-Wei Lee, Hsuan-Fu Wang
In recent years, convolutional neural network (CNN) has been increasingly considered as a promising technology for military and homeland security applications. The fusion of CNN and Support vector machine (SVM), a popular traditional machine learning approach, has received intensive attention in the field of synthetic aperture radar (SAR) automatic target recognition (ATR). This paper, firstly, discusses the effects of some preprocessing and image enhancement methods on the performance of SAR ATR, starting with the pre-trained AlexNet in a transfer-learning based approach. Secondly, the architecture of AlexNet is modified to form a new model suitable for SAR ATR. Finally, we propose a hybrid model associated with the success of the learning feature of our CNN model and the ability of SVM to process high-dimensional dataset effectively. To evaluate the proposed method, experiments are performed on the Moving and Stationary Target Acquisition and Recognition (MSTAR) public database. The comparative results demonstrate that these preprocessing and enhancement methods prior to the deep-learning process are not necessary since the feature representation ability of AlexNet is already powerful. Furthermore, experimental results on the benchmark MSTAR dataset illustrate the effectiveness of the proposed new model. On classification of ten-class targets, the commonly used translation augmentation for training data has been performed. By combining the CNN and SVM, the classification accuracy percentages can be slightly improved for our proposed new model.
{"title":"Automatic Target Recognition in SAR Images Based on a Combination of CNN and SVM","authors":"Tzong-Dar Wu, Yuting Yen, J. H. Wang, R. Huang, Hung-Wei Lee, Hsuan-Fu Wang","doi":"10.1109/iWEM49354.2020.9237422","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237422","url":null,"abstract":"In recent years, convolutional neural network (CNN) has been increasingly considered as a promising technology for military and homeland security applications. The fusion of CNN and Support vector machine (SVM), a popular traditional machine learning approach, has received intensive attention in the field of synthetic aperture radar (SAR) automatic target recognition (ATR). This paper, firstly, discusses the effects of some preprocessing and image enhancement methods on the performance of SAR ATR, starting with the pre-trained AlexNet in a transfer-learning based approach. Secondly, the architecture of AlexNet is modified to form a new model suitable for SAR ATR. Finally, we propose a hybrid model associated with the success of the learning feature of our CNN model and the ability of SVM to process high-dimensional dataset effectively. To evaluate the proposed method, experiments are performed on the Moving and Stationary Target Acquisition and Recognition (MSTAR) public database. The comparative results demonstrate that these preprocessing and enhancement methods prior to the deep-learning process are not necessary since the feature representation ability of AlexNet is already powerful. Furthermore, experimental results on the benchmark MSTAR dataset illustrate the effectiveness of the proposed new model. On classification of ten-class targets, the commonly used translation augmentation for training data has been performed. By combining the CNN and SVM, the classification accuracy percentages can be slightly improved for our proposed new model.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"102 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":"114568828","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/iWEM49354.2020.9237395
Yi-Xin Lin, Yen‐Sheng Chen
A high-gain antenna covering 1.7-5.5 GHz based on a quasi-Yagi structure is proposed for frequency-coded chipless radiofrequency identification (RFID) handheld readers. To enhance the capacity of chipless RFID, a broadband spectrum is required. In addition, when chipless tags are arranged facing the reader, a high-gain reader antenna is desired such that detection reliability can be improved. To meet the two requirements simultaneously, we propose an antenna that uses the quasi-Yagi configuration with a broadened impedance bandwidth and large front-to-back ratio (FBR). The bandwidth improvement is achieved using a bow-tie shaped driven dipole. The enhancement of gain is obtained using optimized parameters for directors and a reflector. Simulated results indicate that the impedance bandwidth is 1.70-5.53 GHz. The broadside gain and FBR vary over the passband are 3.7-5.3 dBi and 4.8-16.8 dB, respectively. The performance of the antenna is suitable for the chipless RFID system that has a data capacity of 21 bits.
{"title":"Broadband and High-Gain Antenna for Frequency-Coded Chipless RFID Handheld Readers","authors":"Yi-Xin Lin, Yen‐Sheng Chen","doi":"10.1109/iWEM49354.2020.9237395","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237395","url":null,"abstract":"A high-gain antenna covering 1.7-5.5 GHz based on a quasi-Yagi structure is proposed for frequency-coded chipless radiofrequency identification (RFID) handheld readers. To enhance the capacity of chipless RFID, a broadband spectrum is required. In addition, when chipless tags are arranged facing the reader, a high-gain reader antenna is desired such that detection reliability can be improved. To meet the two requirements simultaneously, we propose an antenna that uses the quasi-Yagi configuration with a broadened impedance bandwidth and large front-to-back ratio (FBR). The bandwidth improvement is achieved using a bow-tie shaped driven dipole. The enhancement of gain is obtained using optimized parameters for directors and a reflector. Simulated results indicate that the impedance bandwidth is 1.70-5.53 GHz. The broadside gain and FBR vary over the passband are 3.7-5.3 dBi and 4.8-16.8 dB, respectively. The performance of the antenna is suitable for the chipless RFID system that has a data capacity of 21 bits.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"59 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":"125918825","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 study describes a design of a tag antenna for Radio Frequency Identification (RFID) in the Ultra-High Frequency (UHF) which allows different tuning methods to tune the antenna's impedance on metallic objects. The compact patch antenna consists of a C-Shaped resonator and a ground plane connected a small shorting wall and fed by a loop in the middle of the C-Shaped resonator. A couple of slits etched around the shorting wall and a slot etched in the center of the C-shaped resonator result in a flexible adjusting method to match a conjugating impedance with the UCODE 8/8m chip (19 - j234 Ω at 915 MHz). The optimal design with an overall size of 30 × 30 × 3 mm3 (0.092 λ0 x 0.092 λ0 x 0.0092 λ0) yields a reading range of 6.4 m for the effective isotropic radiated power (EIRP) of 4.0 W.
{"title":"Compact Shorted C-Shaped Patch Antenna for UHF RFID Tag Mounted on Metallic Objects","authors":"Nguyen Minh Tan, Yi‐Fang Lin, Chun-Hsien Chang, Chia‐Te Liao, Hua‐Ming Chen","doi":"10.1109/iWEM49354.2020.9237434","DOIUrl":"https://doi.org/10.1109/iWEM49354.2020.9237434","url":null,"abstract":"This study describes a design of a tag antenna for Radio Frequency Identification (RFID) in the Ultra-High Frequency (UHF) which allows different tuning methods to tune the antenna's impedance on metallic objects. The compact patch antenna consists of a C-Shaped resonator and a ground plane connected a small shorting wall and fed by a loop in the middle of the C-Shaped resonator. A couple of slits etched around the shorting wall and a slot etched in the center of the C-shaped resonator result in a flexible adjusting method to match a conjugating impedance with the UCODE 8/8m chip (19 - j234 Ω at 915 MHz). The optimal design with an overall size of 30 × 30 × 3 mm3 (0.092 λ0 x 0.092 λ0 x 0.0092 λ0) yields a reading range of 6.4 m for the effective isotropic radiated power (EIRP) of 4.0 W.","PeriodicalId":201518,"journal":{"name":"2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"63 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":"124495741","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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