Pub Date : 2021-04-08DOI: 10.1109/APWiMob51111.2021.9435240
Jason Brown, N. Raj
Significant research is currently focused on the issue of malicious UAVs or drones disrupting critical services (e.g. civilian airport operations). One mitigation is to track or pursue a malicious UAV back to its point of origin (and possibly its owner) using a swarm of surveillance UAVs. This becomes of particular academic interest when the malicious UAV has superior capabilities to the individual surveillance UAVs (e.g. in terms of maximum speed). In this paper, we deduce a guidance law (i.e. a rule for determining the direction of flight) for individual surveillance UAVs to maximize the tracking time of a highly capable malicious UAV. We then demonstrate the validity of the analysis using some examples with realistic contemporary UAV capability parameters. The significance of this research is that, in a networked swarm of surveillance UAVs which communicate with each other, if each surveillance UAV maximizes its tracking time, there is a higher probability that the next closest surveillance UAV can be in a position to assume tracking responsibilities when the malicious UAV moves out of tracking range of the original surveillance UAV. In order to demonstrate this, a simulation of a networked swarm of surveillance UAVs which track a high capability malicious UAV is undertaken under various scenarios.
{"title":"Guidance Law for a Surveillance UAV Swarm Tracking a High Capability Malicious UAV","authors":"Jason Brown, N. Raj","doi":"10.1109/APWiMob51111.2021.9435240","DOIUrl":"https://doi.org/10.1109/APWiMob51111.2021.9435240","url":null,"abstract":"Significant research is currently focused on the issue of malicious UAVs or drones disrupting critical services (e.g. civilian airport operations). One mitigation is to track or pursue a malicious UAV back to its point of origin (and possibly its owner) using a swarm of surveillance UAVs. This becomes of particular academic interest when the malicious UAV has superior capabilities to the individual surveillance UAVs (e.g. in terms of maximum speed). In this paper, we deduce a guidance law (i.e. a rule for determining the direction of flight) for individual surveillance UAVs to maximize the tracking time of a highly capable malicious UAV. We then demonstrate the validity of the analysis using some examples with realistic contemporary UAV capability parameters. The significance of this research is that, in a networked swarm of surveillance UAVs which communicate with each other, if each surveillance UAV maximizes its tracking time, there is a higher probability that the next closest surveillance UAV can be in a position to assume tracking responsibilities when the malicious UAV moves out of tracking range of the original surveillance UAV. In order to demonstrate this, a simulation of a networked swarm of surveillance UAVs which track a high capability malicious UAV is undertaken under various scenarios.","PeriodicalId":325270,"journal":{"name":"2021 IEEE Asia Pacific Conference on Wireless and Mobile (APWiMob)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125773297","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 : 2021-04-08DOI: 10.1109/APWiMob51111.2021.9435257
Arief Budi Santiko, Edwar, A. Munir
The growth of technological device used in wireless local area network (WLAN) such as antennas, power dividers, and filters should be able to deliver the device to be low-cost, light weight, and compact. This paper deals with the development of power divider for WLAN application which is incorporated with filter, called as filtering power divider (FPD). The conventional power divider is enhanced by adding bandpass filter (BPF) made of substrate integrated waveguide (SIW) structure. A simulation software is used to design and optimize the filter performance. The FPD which is fabricated using an RT/Duroid® 5880 dielectric substrate with the dimension of $mathbf{65} mathbf{mm}times mathbf{95 mm}$ has good performance in the frequency range of 5.92 GHz to 5.98 GHz with the insertion loss of −6.5 dB. The isolation between output port is −20dB at the center frequency of 5.95 GHz which produces very low crosstalk level. In addition, the proposed FPD has the ability to be integrated with other circuits especially for reconfigurable feeding antenna usage.
{"title":"Development of Filtering Power Divider for WLAN Application Using SIW Bandpass Filter","authors":"Arief Budi Santiko, Edwar, A. Munir","doi":"10.1109/APWiMob51111.2021.9435257","DOIUrl":"https://doi.org/10.1109/APWiMob51111.2021.9435257","url":null,"abstract":"The growth of technological device used in wireless local area network (WLAN) such as antennas, power dividers, and filters should be able to deliver the device to be low-cost, light weight, and compact. This paper deals with the development of power divider for WLAN application which is incorporated with filter, called as filtering power divider (FPD). The conventional power divider is enhanced by adding bandpass filter (BPF) made of substrate integrated waveguide (SIW) structure. A simulation software is used to design and optimize the filter performance. The FPD which is fabricated using an RT/Duroid® 5880 dielectric substrate with the dimension of $mathbf{65} mathbf{mm}times mathbf{95 mm}$ has good performance in the frequency range of 5.92 GHz to 5.98 GHz with the insertion loss of −6.5 dB. The isolation between output port is −20dB at the center frequency of 5.95 GHz which produces very low crosstalk level. In addition, the proposed FPD has the ability to be integrated with other circuits especially for reconfigurable feeding antenna usage.","PeriodicalId":325270,"journal":{"name":"2021 IEEE Asia Pacific Conference on Wireless and Mobile (APWiMob)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122573124","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 : 2021-04-08DOI: 10.1109/APWiMob51111.2021.9435206
Zulfi, J. Suryana, A. Munir
As is already known, Butler matrix is one of essential beamforming networks frequently applied for multiple beams. This is due to its characteristics which has high beam crossover level and lossless property. In this paper, a 4×4 Butler matrix is designed and fabricated to be implemented for switched-beam antenna array. It is deployed on an FR4 epoxy dielectric substrate with the thickness of 0.8 mm and the dielectric constant of 4.3. The conductor patch and groundplane use metallic copper with the thickness of 0.035 mm. Some key parameters of Butler matrix such as the amplitude and phase responses are characterized and investigated through simulation and measurement. The characterization results demonstrate that the proposed 4×4 Butler matrix takes the overall size of 136.4 mm × 87.5 mm (2.26λg × 1.45λg) and shows good amplitude and phase performances. The progressive phase difference of −40.52° ± 6.99° and the amplitude of −8.32 ± 1.08 dB were achieved at the operating frequency of 2.4 GHz. Meanwhile, the measured return loss fractional bandwidth of 16.25% could be attained at the frequency range of 2.15 GHz to 2.54 GHz.
众所周知，巴特勒矩阵是经常应用于多波束的重要波束形成网络之一。这是由于它具有高光束交叉电平和无损特性。本文设计并制作了一个4×4巴特勒矩阵，用于开关波束天线阵列的实现。它部署在厚度为0.8 mm，介电常数为4.3的FR4环氧介电基片上。导体贴片和接地线采用金属铜，厚度为0.035 mm。通过仿真和测量，对巴特勒矩阵的幅值和相位响应等关键参数进行了表征和研究。表征结果表明，4×4 Butler矩阵的总尺寸为136.4 mm × 87.5 mm (2.26λg × 1.45λg)，具有良好的幅相性能。在2.4 GHz工作频率下，实现了−40.52°±6.99°的递进相位差和−8.32±1.08 dB的幅值。同时，在2.15 GHz ~ 2.54 GHz频率范围内，测得的回波损耗分数带宽为16.25%。
{"title":"Design and Characterization of 4×4 Butler Matrix for Switched-Beam Antenna Array","authors":"Zulfi, J. Suryana, A. Munir","doi":"10.1109/APWiMob51111.2021.9435206","DOIUrl":"https://doi.org/10.1109/APWiMob51111.2021.9435206","url":null,"abstract":"As is already known, Butler matrix is one of essential beamforming networks frequently applied for multiple beams. This is due to its characteristics which has high beam crossover level and lossless property. In this paper, a 4×4 Butler matrix is designed and fabricated to be implemented for switched-beam antenna array. It is deployed on an FR4 epoxy dielectric substrate with the thickness of 0.8 mm and the dielectric constant of 4.3. The conductor patch and groundplane use metallic copper with the thickness of 0.035 mm. Some key parameters of Butler matrix such as the amplitude and phase responses are characterized and investigated through simulation and measurement. The characterization results demonstrate that the proposed 4×4 Butler matrix takes the overall size of 136.4 mm × 87.5 mm (2.26λg × 1.45λg) and shows good amplitude and phase performances. The progressive phase difference of −40.52° ± 6.99° and the amplitude of −8.32 ± 1.08 dB were achieved at the operating frequency of 2.4 GHz. Meanwhile, the measured return loss fractional bandwidth of 16.25% could be attained at the frequency range of 2.15 GHz to 2.54 GHz.","PeriodicalId":325270,"journal":{"name":"2021 IEEE Asia Pacific Conference on Wireless and Mobile (APWiMob)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128445213","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 : 2021-04-08DOI: 10.1109/APWiMob51111.2021.9435235
Rizal Cerdas Kurniawan, Rohmat Tulloh, I. D. Irawati
In this paper, Software Defined Network (SDN) technology is applied using the Open Network Operating System (ONOS), which can separate the control plane and the data plane on a network device. ONOS is installed on Raspberry-Pi 3 to minimize the use of Personal Computer (PC) devices on SDN networks. ONOS is also implemented to support Virtual Private LAN Service (VPLS) features that create the Layer-2 network by using the OpenFlow protocol. Software is connected to the host network by connecting to network overlays that are connected to the OpenFlow data plane protocol. VPLS can maximize the existing bandwidth when communication occurs between remote network devices on a local network. We tested voice over Internet Protocol (VoIP) with a variety of background traffic. The test results show that the network performance meets the good level according to the THIPON standard.
{"title":"VPLS on Software Defined Network Using ONOS Controller Based on Raspberry-Pi 3","authors":"Rizal Cerdas Kurniawan, Rohmat Tulloh, I. D. Irawati","doi":"10.1109/APWiMob51111.2021.9435235","DOIUrl":"https://doi.org/10.1109/APWiMob51111.2021.9435235","url":null,"abstract":"In this paper, Software Defined Network (SDN) technology is applied using the Open Network Operating System (ONOS), which can separate the control plane and the data plane on a network device. ONOS is installed on Raspberry-Pi 3 to minimize the use of Personal Computer (PC) devices on SDN networks. ONOS is also implemented to support Virtual Private LAN Service (VPLS) features that create the Layer-2 network by using the OpenFlow protocol. Software is connected to the host network by connecting to network overlays that are connected to the OpenFlow data plane protocol. VPLS can maximize the existing bandwidth when communication occurs between remote network devices on a local network. We tested voice over Internet Protocol (VoIP) with a variety of background traffic. The test results show that the network performance meets the good level according to the THIPON standard.","PeriodicalId":325270,"journal":{"name":"2021 IEEE Asia Pacific Conference on Wireless and Mobile (APWiMob)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133265618","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 : 2021-04-08DOI: 10.1109/APWiMob51111.2021.9435267
Adi Setyo Nugroho, Aziz Fajar, R. Sarno, C. Fatichah, A. Fahmi, S. Utomo, Francisca Notopuro
Research at Digital Imaging and Communication in Medicine (DICOM) is very useful research in the field of health. In brain images, the problem encountered is when you want to divide or segment each part of the brain. In previous studies, some of research are still segmenting from 2-dimensional images, where the results will be different for each image slice. Therefore, in this research, we conducted the Magnetic Resonance Image (MRI) segmentation of the brain from the 3-dimensional plane to prevent the information contained in the images from being lost. In the early stages, MRI images will be converted to NifTi format to obtain 3-dimensional volume. The pre-processing is added as a modification from previous research, such as, convert image to grayscale, bias field correction, and skull stripping method to remove the skull (non-brain tissue) so that only brain tissue remains from the human brain. The segmentation process is done using multi-otsu thresholding. The experimental result shows that our method has successfully got three different brain tissue named white matter (WM), gray matter (GM), cerebrospinal fluid (CSF).
{"title":"Unsupervised Method for 3D Brain Magnetic Resonance Image Segmentation","authors":"Adi Setyo Nugroho, Aziz Fajar, R. Sarno, C. Fatichah, A. Fahmi, S. Utomo, Francisca Notopuro","doi":"10.1109/APWiMob51111.2021.9435267","DOIUrl":"https://doi.org/10.1109/APWiMob51111.2021.9435267","url":null,"abstract":"Research at Digital Imaging and Communication in Medicine (DICOM) is very useful research in the field of health. In brain images, the problem encountered is when you want to divide or segment each part of the brain. In previous studies, some of research are still segmenting from 2-dimensional images, where the results will be different for each image slice. Therefore, in this research, we conducted the Magnetic Resonance Image (MRI) segmentation of the brain from the 3-dimensional plane to prevent the information contained in the images from being lost. In the early stages, MRI images will be converted to NifTi format to obtain 3-dimensional volume. The pre-processing is added as a modification from previous research, such as, convert image to grayscale, bias field correction, and skull stripping method to remove the skull (non-brain tissue) so that only brain tissue remains from the human brain. The segmentation process is done using multi-otsu thresholding. The experimental result shows that our method has successfully got three different brain tissue named white matter (WM), gray matter (GM), cerebrospinal fluid (CSF).","PeriodicalId":325270,"journal":{"name":"2021 IEEE Asia Pacific Conference on Wireless and Mobile (APWiMob)","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115780573","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 : 2021-04-08DOI: 10.1109/APWiMob51111.2021.9435269
Nikki John B. Florita, Miguel Luis R. Sesdoyro, Julian Troy C. Valdez, Richard Guinto, Wilson M. Tan
Despite the falling cost of electronics, the adoption IoT systems in households (“smart homes”) is hampered by their strict reliance on stable and reliable Internet connection, which is not readily available in all places around the world. This reliance is greater still in sensor-actuator setups that are comprised of products from several manufacturers or ecosystems, since the packets have to traverse and be processed by different cloud-based servers. In this paper, we propose a resilient IoT system which enables household IoT systems to remain functional even in the absence of an Internet connection. The system utilizes container-based virtualization in locally hosting cloud server functionality and software-defined networking (SDN) in hiding the packet redirection and providing a seamless network experience for the IoT devices. The system was built and its performance profiled as it utilized different hardware for its container-based virtualization host.
{"title":"IoT Resiliency through Edge-located Container-based Virtualization and SDN","authors":"Nikki John B. Florita, Miguel Luis R. Sesdoyro, Julian Troy C. Valdez, Richard Guinto, Wilson M. Tan","doi":"10.1109/APWiMob51111.2021.9435269","DOIUrl":"https://doi.org/10.1109/APWiMob51111.2021.9435269","url":null,"abstract":"Despite the falling cost of electronics, the adoption IoT systems in households (“smart homes”) is hampered by their strict reliance on stable and reliable Internet connection, which is not readily available in all places around the world. This reliance is greater still in sensor-actuator setups that are comprised of products from several manufacturers or ecosystems, since the packets have to traverse and be processed by different cloud-based servers. In this paper, we propose a resilient IoT system which enables household IoT systems to remain functional even in the absence of an Internet connection. The system utilizes container-based virtualization in locally hosting cloud server functionality and software-defined networking (SDN) in hiding the packet redirection and providing a seamless network experience for the IoT devices. The system was built and its performance profiled as it utilized different hardware for its container-based virtualization host.","PeriodicalId":325270,"journal":{"name":"2021 IEEE Asia Pacific Conference on Wireless and Mobile (APWiMob)","volume":"383 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114791742","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 : 2021-04-08DOI: 10.1109/APWiMob51111.2021.9435200
H. Halim, M. I. Sulaiman, Z. Mansor, R. Anwar, D. A. Nurmantris
The evolution of Wireless Body Area Network (WBAN) is made possible due to the rapid growth of wireless network and constant miniaturization of electrical devices. However, designing an antenna that is suitable for WBAN applications is challenging as the antenna should has compact size, in addition to the ability to endure low power loss during transmission and has robust communication link. Thus, a miniaturized wearable Dielectric Resonator Antenna (DRA) capable of radiating circularly polarized (CP) wave is designed. The antenna designing is done by using CST software. A total of 140 simulations is simulated in order to obtain the desired results. The DRA is used, together with conformal copper strips and miniaturized copper ground plane. The single point fed antenna is excited by a unique capital F-shaped conformal copper strips. The CP DRA offers a simulated Axial Ratio bandwidth below 3dB of ~23.85%, which is much greater than what has been reported in the previous work, with bandwidth of S11 below −10dB ~ 16.066%. In addition, the antenna designed in this research project managed to achieve an overlapped bandwidth of ~14.10% (6.9GHz – 7.94GHz). A prototype antenna is fabricated to validate the simulation result. Thus, the antenna design in this research will be helpful towards the evolution of the WBAN.
{"title":"The Design of Miniaturized Wearable Circularly Polarized Dielectric Resonator Antenna","authors":"H. Halim, M. I. Sulaiman, Z. Mansor, R. Anwar, D. A. Nurmantris","doi":"10.1109/APWiMob51111.2021.9435200","DOIUrl":"https://doi.org/10.1109/APWiMob51111.2021.9435200","url":null,"abstract":"The evolution of Wireless Body Area Network (WBAN) is made possible due to the rapid growth of wireless network and constant miniaturization of electrical devices. However, designing an antenna that is suitable for WBAN applications is challenging as the antenna should has compact size, in addition to the ability to endure low power loss during transmission and has robust communication link. Thus, a miniaturized wearable Dielectric Resonator Antenna (DRA) capable of radiating circularly polarized (CP) wave is designed. The antenna designing is done by using CST software. A total of 140 simulations is simulated in order to obtain the desired results. The DRA is used, together with conformal copper strips and miniaturized copper ground plane. The single point fed antenna is excited by a unique capital F-shaped conformal copper strips. The CP DRA offers a simulated Axial Ratio bandwidth below 3dB of ~23.85%, which is much greater than what has been reported in the previous work, with bandwidth of S11 below −10dB ~ 16.066%. In addition, the antenna designed in this research project managed to achieve an overlapped bandwidth of ~14.10% (6.9GHz – 7.94GHz). A prototype antenna is fabricated to validate the simulation result. Thus, the antenna design in this research will be helpful towards the evolution of the WBAN.","PeriodicalId":325270,"journal":{"name":"2021 IEEE Asia Pacific Conference on Wireless and Mobile (APWiMob)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125887661","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 : 2021-04-08DOI: 10.1109/APWiMob51111.2021.9435229
Syahrizal Hanif, D. Wijaya, Wawa Wikusna
In Indonesia, rice is a food commodity that has a strategic and vital role. Considering rice's importance, the government always strives to ensure food needs and a surplus of rice as food reserves. However, rice has decreased in quality and is not suitable for consumption in recent years. Conventionally, the rice shelf life prediction methods use the direct method that the rice samples are tested by smelling the rice using the human sense of smell to predict how long rice's shelf life is. Therefore, we propose another method to predict how long rice's shelf life. Developing a prediction system for the shelf life of rice uses the k-nearest neighbors (k-NN) algorithm and electronic nose (E-nose) dataset to predict how long rice's shelf life more quickly. This experiment showed that the k-NN Regression algorithm obtained the best parameters with the R2 score of 0.7217 and the RMSE score of 3.8043. This method predicts the shelf life of rice effectively and solves existing problems because it can achieve accuracy very well.
{"title":"K-Nearest Neighbors Algorithm for Prediction Shelf Life of Rice Based on Electronic Nose Dataset","authors":"Syahrizal Hanif, D. Wijaya, Wawa Wikusna","doi":"10.1109/APWiMob51111.2021.9435229","DOIUrl":"https://doi.org/10.1109/APWiMob51111.2021.9435229","url":null,"abstract":"In Indonesia, rice is a food commodity that has a strategic and vital role. Considering rice's importance, the government always strives to ensure food needs and a surplus of rice as food reserves. However, rice has decreased in quality and is not suitable for consumption in recent years. Conventionally, the rice shelf life prediction methods use the direct method that the rice samples are tested by smelling the rice using the human sense of smell to predict how long rice's shelf life is. Therefore, we propose another method to predict how long rice's shelf life. Developing a prediction system for the shelf life of rice uses the k-nearest neighbors (k-NN) algorithm and electronic nose (E-nose) dataset to predict how long rice's shelf life more quickly. This experiment showed that the k-NN Regression algorithm obtained the best parameters with the R2 score of 0.7217 and the RMSE score of 3.8043. This method predicts the shelf life of rice effectively and solves existing problems because it can achieve accuracy very well.","PeriodicalId":325270,"journal":{"name":"2021 IEEE Asia Pacific Conference on Wireless and Mobile (APWiMob)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130782255","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 : 2021-04-08DOI: 10.1109/APWiMob51111.2021.9435226
Chairunnisa, Nurul Fadilah, A. D. Prasetyo, A. Munir
The use of array antenna which has a sequential phase characteristic is sometimes required for a specific radar application. This paper deals with the design and characterization of proximity coupled square patch array antenna with sequential phase feeding network are presented for L-band radar. The proposed array antenna designed to work at the L-band frequency of 1275 MHz is constructed by 1×4 slotted and truncated corner square patches. The use of proximity coupled feed as well as corner truncation is to yield wide bandwidth response, while the slot over square patch is applied to attain circularly polarized waves. The array antenna is deployed on two layers of 1.6 mm thick flame retardant (FR) 4 epoxy dielectric substrate with the width of 95 mm and the length of 312 mm. The characterization results show that the −10 dB fractional impedance bandwidth is 5.5% in the frequency range of 1212 MHz to 1280 MHz with the 3dB axial-ratio bandwidth of 54 MHz from the frequency of 1222 MHz to 1276 MHz.
{"title":"Proximity Coupled Square Patch Array Antenna for L-Band Radar with Sequential Phase Feeding Network","authors":"Chairunnisa, Nurul Fadilah, A. D. Prasetyo, A. Munir","doi":"10.1109/APWiMob51111.2021.9435226","DOIUrl":"https://doi.org/10.1109/APWiMob51111.2021.9435226","url":null,"abstract":"The use of array antenna which has a sequential phase characteristic is sometimes required for a specific radar application. This paper deals with the design and characterization of proximity coupled square patch array antenna with sequential phase feeding network are presented for L-band radar. The proposed array antenna designed to work at the L-band frequency of 1275 MHz is constructed by 1×4 slotted and truncated corner square patches. The use of proximity coupled feed as well as corner truncation is to yield wide bandwidth response, while the slot over square patch is applied to attain circularly polarized waves. The array antenna is deployed on two layers of 1.6 mm thick flame retardant (FR) 4 epoxy dielectric substrate with the width of 95 mm and the length of 312 mm. The characterization results show that the −10 dB fractional impedance bandwidth is 5.5% in the frequency range of 1212 MHz to 1280 MHz with the 3dB axial-ratio bandwidth of 54 MHz from the frequency of 1222 MHz to 1276 MHz.","PeriodicalId":325270,"journal":{"name":"2021 IEEE Asia Pacific Conference on Wireless and Mobile (APWiMob)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133447845","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 : 2021-04-08DOI: 10.1109/APWiMob51111.2021.9435238
Muhammad Ibadurrahman Arrasyid Supriyanto, Aziz Fajar, R. Sarno, C. Fatichah, A. Fahmi, S. Utomo, Francisca Notopuro
High-resolution, high-quality imagery forms the basis of accurate 3D reconstructions. 3D reconstruction is obtained from a 3-dimensional stacking array or image sequence. In some cases the resulting slice image has a low resolution so that some parts miss information when reconstructed into 3D. The reconstruction of the new slice carried out by the researcher using the 3D interpolation technique has a disadvantage, namely that when the calculation is carried out using the structure similarity evaluation metrics, it is still unsatisfactory, therefore the following research will try to reconstruct a new slice using the optical flow approach to calculate the displacement vector field between the two adjacent slices and also we will evaluate the comparative suitability of various interpolation techniques using root mean square error (RMSE), peak signal-to-noise ratio (PSNR), structural similarity index (SSIM). experimental results shows that the use of the optical flow method in image reconstruction between I0 and I1 after interpolation has an increase in the similarity structure value of 0.002, a decrease in the NMSE value of 0.04, and an increase in the PSNR value of 2 leading to figure I0 rather than without using optical flow.
{"title":"Slice Reconstruction on 3D Medical Image using Optical Flow Approach","authors":"Muhammad Ibadurrahman Arrasyid Supriyanto, Aziz Fajar, R. Sarno, C. Fatichah, A. Fahmi, S. Utomo, Francisca Notopuro","doi":"10.1109/APWiMob51111.2021.9435238","DOIUrl":"https://doi.org/10.1109/APWiMob51111.2021.9435238","url":null,"abstract":"High-resolution, high-quality imagery forms the basis of accurate 3D reconstructions. 3D reconstruction is obtained from a 3-dimensional stacking array or image sequence. In some cases the resulting slice image has a low resolution so that some parts miss information when reconstructed into 3D. The reconstruction of the new slice carried out by the researcher using the 3D interpolation technique has a disadvantage, namely that when the calculation is carried out using the structure similarity evaluation metrics, it is still unsatisfactory, therefore the following research will try to reconstruct a new slice using the optical flow approach to calculate the displacement vector field between the two adjacent slices and also we will evaluate the comparative suitability of various interpolation techniques using root mean square error (RMSE), peak signal-to-noise ratio (PSNR), structural similarity index (SSIM). experimental results shows that the use of the optical flow method in image reconstruction between I0 and I1 after interpolation has an increase in the similarity structure value of 0.002, a decrease in the NMSE value of 0.04, and an increase in the PSNR value of 2 leading to figure I0 rather than without using optical flow.","PeriodicalId":325270,"journal":{"name":"2021 IEEE Asia Pacific Conference on Wireless and Mobile (APWiMob)","volume":"33 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123235440","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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