Pub Date : 2023-05-09DOI: 10.1109/ECTI-CON58255.2023.10153223
Chanokchon Chen, Suchaisri Lion, Aphirak Jansang, C. Jaikaeo, A. Phonphoem, Withawat Tangtrongpairoj
LoRa is a promising solution for long-range transmission with low power consumption, which is suitable for small vessel tracking systems. However, the LoRa is not designed for a scalable tracking system resulting in the most deficient performance. This paper proposes a dynamic time slot allocation protocol based on multi-channel LoRa communication. The protocol combines the idea of CSMA/CA Time Division Multiplexing and Frequency Division Multiplexing. This protocol has an adaption channel rate that chooses the appropriate channel for each device and a dynamic max slot mechanism that adjusts the number of max slots for each round. The experimental results on NS3 show that this protocol has better network performance in terms of average time to send all packets compared to general Static and Dynamic TDMA. This paper designs for small vessel tracking system based on multi-channel LoRa communication.
{"title":"Dynamic Slot Allocation Protocol for Multi-Channel LoRa Communication","authors":"Chanokchon Chen, Suchaisri Lion, Aphirak Jansang, C. Jaikaeo, A. Phonphoem, Withawat Tangtrongpairoj","doi":"10.1109/ECTI-CON58255.2023.10153223","DOIUrl":"https://doi.org/10.1109/ECTI-CON58255.2023.10153223","url":null,"abstract":"LoRa is a promising solution for long-range transmission with low power consumption, which is suitable for small vessel tracking systems. However, the LoRa is not designed for a scalable tracking system resulting in the most deficient performance. This paper proposes a dynamic time slot allocation protocol based on multi-channel LoRa communication. The protocol combines the idea of CSMA/CA Time Division Multiplexing and Frequency Division Multiplexing. This protocol has an adaption channel rate that chooses the appropriate channel for each device and a dynamic max slot mechanism that adjusts the number of max slots for each round. The experimental results on NS3 show that this protocol has better network performance in terms of average time to send all packets compared to general Static and Dynamic TDMA. This paper designs for small vessel tracking system based on multi-channel LoRa communication.","PeriodicalId":340768,"journal":{"name":"2023 20th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124554367","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 : 2023-05-09DOI: 10.1109/ECTI-CON58255.2023.10153182
Kan Kanpanya, J. Sarasook
This paper presents effect of non-uniform electric field on yield of bio-oil in fast pyrolysis process. This aim compares the influence of three electrodes types on bio-oil yield. The electric field is non uniform field; rod-cylindrical electrodes. Cylindrical electrodes made of stainless which diameter is 50 mm with the length of 250 mm. Three rod electrodes types include stainless, copper wire and tungsten wire. Stainless rod diameter is 4 mm with 150 mm in length, the copper rod made of 0.1 mm copper wire rolls around bamboo stick with the total diameter of 4 mm and finally, tungsten rod made of 0.1 mm tungsten wire rolls around bamboo stick with the total diameter of 4 mm also. The experiment in pyrolysis process at 500°C with Nitrogen gas at IPSI pressure. The feed bio-mass rate is 100 g/hr. The bio mass size is 250-425 micrometer made of Cassava rhizomes and stems. The 12 KV DC voltage is supple for electrode testing at 2 hours. The bio mass feeder is 200 g. The current and voltage is measured to find conduction of pyrolysis gas. From experimental results, it is found that copper is highest current and then tungsten and stainless. The bio oil yield gotten by three rode electrode type; tungsten wire, copper wire and stainless are 63.54, 60.24 and 30.64 respectively. It is summarize that the tungsten wire rod electrode is the most suitable for fast pyrolysis vapor condensation system by ESP (Electrostatic precipitator) technique.
{"title":"Effect of Non Uniform Electric Field on Yield of Bio-oil in Fast Pyrolysis Process","authors":"Kan Kanpanya, J. Sarasook","doi":"10.1109/ECTI-CON58255.2023.10153182","DOIUrl":"https://doi.org/10.1109/ECTI-CON58255.2023.10153182","url":null,"abstract":"This paper presents effect of non-uniform electric field on yield of bio-oil in fast pyrolysis process. This aim compares the influence of three electrodes types on bio-oil yield. The electric field is non uniform field; rod-cylindrical electrodes. Cylindrical electrodes made of stainless which diameter is 50 mm with the length of 250 mm. Three rod electrodes types include stainless, copper wire and tungsten wire. Stainless rod diameter is 4 mm with 150 mm in length, the copper rod made of 0.1 mm copper wire rolls around bamboo stick with the total diameter of 4 mm and finally, tungsten rod made of 0.1 mm tungsten wire rolls around bamboo stick with the total diameter of 4 mm also. The experiment in pyrolysis process at 500°C with Nitrogen gas at IPSI pressure. The feed bio-mass rate is 100 g/hr. The bio mass size is 250-425 micrometer made of Cassava rhizomes and stems. The 12 KV DC voltage is supple for electrode testing at 2 hours. The bio mass feeder is 200 g. The current and voltage is measured to find conduction of pyrolysis gas. From experimental results, it is found that copper is highest current and then tungsten and stainless. The bio oil yield gotten by three rode electrode type; tungsten wire, copper wire and stainless are 63.54, 60.24 and 30.64 respectively. It is summarize that the tungsten wire rod electrode is the most suitable for fast pyrolysis vapor condensation system by ESP (Electrostatic precipitator) technique.","PeriodicalId":340768,"journal":{"name":"2023 20th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131325338","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 : 2023-05-09DOI: 10.1109/ECTI-CON58255.2023.10153270
Sanya Phowong, Krishda Srichanpiyom, Premsak Puangploy, Chaow Euafua, M. Phothisonothai
In the COVID-19 outbreak, the promotion of the use of Andrographis Paniculata (ADG) as a complementary treatment of mild COVID-19 patients has been announced in Thailand. This paper aims to present an automated system for ADG plating on the basis of smart agriculture platform using Internet of Things (IoT) technology. The proposed platform is designed for entirely planting throughout the ADG’s lifecycle divided into three experimental stages and able to process time-dependent heterogeneous information on the edge layer as a pre-processing, i.e., temperature, soil moisture, light exposure, acidic/basic pH value, soil fertility, and near-infrared spectrum. To determine the optimal condition of volumetric water content (VWC), the rule-based decision support system (DSS) model has been applied on the cloud layer as a final decision. The effectiveness of the proposed platform in terms of three stages lifecycle ADG plating and a cost estimation have also been presented.
{"title":"A Low-Cost Edge and Cloud Computing Based Smart Agriculture Platform for Lifecycle Andrographis Paniculata Planting","authors":"Sanya Phowong, Krishda Srichanpiyom, Premsak Puangploy, Chaow Euafua, M. Phothisonothai","doi":"10.1109/ECTI-CON58255.2023.10153270","DOIUrl":"https://doi.org/10.1109/ECTI-CON58255.2023.10153270","url":null,"abstract":"In the COVID-19 outbreak, the promotion of the use of Andrographis Paniculata (ADG) as a complementary treatment of mild COVID-19 patients has been announced in Thailand. This paper aims to present an automated system for ADG plating on the basis of smart agriculture platform using Internet of Things (IoT) technology. The proposed platform is designed for entirely planting throughout the ADG’s lifecycle divided into three experimental stages and able to process time-dependent heterogeneous information on the edge layer as a pre-processing, i.e., temperature, soil moisture, light exposure, acidic/basic pH value, soil fertility, and near-infrared spectrum. To determine the optimal condition of volumetric water content (VWC), the rule-based decision support system (DSS) model has been applied on the cloud layer as a final decision. The effectiveness of the proposed platform in terms of three stages lifecycle ADG plating and a cost estimation have also been presented.","PeriodicalId":340768,"journal":{"name":"2023 20th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"430 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123863349","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 : 2023-05-09DOI: 10.1109/ECTI-CON58255.2023.10153285
Thunwa Boonlert, Naowarat Tephiruk, K. Hongesombut
The generation of electricity is transitioning away from fossil fuels and toward renewable energy. Power electronics dominated power systems, resulting in low-inertia grids. Virtual inertia control strategies have been developed to compensate for lacking inertia. The conventional controller, however, is not adjustable to diverse system dynamics due to the fixed gain of inertia. A fuzzy-based adaptive virtual inertia controller is proposed in this study by focusing on grid frequency responses and energy consumption of energy storage. The controller is tested using a major disturbance, such as a big load shift. The results reveal that an adaptive gain of inertia help improves frequency response while consuming less energy than a fixed inertia gain.
{"title":"Fuzzy-based Adaptive Virtual Inertia Control to Improve Frequency Responses with Less Energy","authors":"Thunwa Boonlert, Naowarat Tephiruk, K. Hongesombut","doi":"10.1109/ECTI-CON58255.2023.10153285","DOIUrl":"https://doi.org/10.1109/ECTI-CON58255.2023.10153285","url":null,"abstract":"The generation of electricity is transitioning away from fossil fuels and toward renewable energy. Power electronics dominated power systems, resulting in low-inertia grids. Virtual inertia control strategies have been developed to compensate for lacking inertia. The conventional controller, however, is not adjustable to diverse system dynamics due to the fixed gain of inertia. A fuzzy-based adaptive virtual inertia controller is proposed in this study by focusing on grid frequency responses and energy consumption of energy storage. The controller is tested using a major disturbance, such as a big load shift. The results reveal that an adaptive gain of inertia help improves frequency response while consuming less energy than a fixed inertia gain.","PeriodicalId":340768,"journal":{"name":"2023 20th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115040527","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 : 2023-05-09DOI: 10.1109/ECTI-CON58255.2023.10153380
Kitiphon Sukpreecha, T. Lertwiriyaprapa, D. Torrungrueng, K. Phaebua
This paper presents an electromagnetic (EM) near-field interpolation for spherical near-field (NF) to farfield (FF) transformations. The two-dimensional (2D) NF interpolation techniques are studied in this work including the 2D linear technique namely the bilinear and low-degree polynomials technique, called bicubic Spline, in order to reduce an effect of NF under-sampling data to FF antenna radiation pattern error. The NF-FF transformation algorithm is implemented by using the spherical wave expansion with trapezoidal rule numerical integration. In the investigation, an under-sampling NF data of the seven-patch array antenna is simulated from the CST Microwave Studio simulation program, where the sampling angles are larger than the maximum sampling angles criteria of the NF spherical sampling theorem. It is found that the FF radiation patterns of AUT from the proposed technique using Spline interpolation and simulated FF radiation pattern are in good agreement. The FF antenna radiation pattern error is reduced. The undersampling NF angles of 25.65 % are studied with FF radiation pattern magnitude error lower than 3 dB. The under-sampling NF data provides less time-consuming of NF data collection. The FF antenna radiation pattern error will be reduced by using appropriate NF interpolation techniques.
{"title":"Electromagnetic Near-field Interpolation for Spherical Near-field to Far-field Transformations","authors":"Kitiphon Sukpreecha, T. Lertwiriyaprapa, D. Torrungrueng, K. Phaebua","doi":"10.1109/ECTI-CON58255.2023.10153380","DOIUrl":"https://doi.org/10.1109/ECTI-CON58255.2023.10153380","url":null,"abstract":"This paper presents an electromagnetic (EM) near-field interpolation for spherical near-field (NF) to farfield (FF) transformations. The two-dimensional (2D) NF interpolation techniques are studied in this work including the 2D linear technique namely the bilinear and low-degree polynomials technique, called bicubic Spline, in order to reduce an effect of NF under-sampling data to FF antenna radiation pattern error. The NF-FF transformation algorithm is implemented by using the spherical wave expansion with trapezoidal rule numerical integration. In the investigation, an under-sampling NF data of the seven-patch array antenna is simulated from the CST Microwave Studio simulation program, where the sampling angles are larger than the maximum sampling angles criteria of the NF spherical sampling theorem. It is found that the FF radiation patterns of AUT from the proposed technique using Spline interpolation and simulated FF radiation pattern are in good agreement. The FF antenna radiation pattern error is reduced. The undersampling NF angles of 25.65 % are studied with FF radiation pattern magnitude error lower than 3 dB. The under-sampling NF data provides less time-consuming of NF data collection. The FF antenna radiation pattern error will be reduced by using appropriate NF interpolation techniques.","PeriodicalId":340768,"journal":{"name":"2023 20th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123723590","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 : 2023-05-09DOI: 10.1109/ECTI-CON58255.2023.10153308
Adisak Intana, Arthiyaporn Sawedsuthiphan
This paper proposes a novel of automatic test case generation framework, STATETest to enhance the current practice of software testing. The framework implements the state transition testing technique that provides the environment to generate test cases from the state machine diagram. The standard XML structure containing various states and their corresponding transition is extracted and generated into the test case matrix and state tree, before they are used to generate test cases. This includes in the case of valid and invalid transitions. The degree of testing coverage is calculated during each test case is created to ensure that the generated test cases cover all possible testing scenarios. The developed tool according to the framework demonstrates the effectiveness and usefulness of our proposed framework. The experimental evaluation with three close-to-realistic case studies confirms the beneficial contribution of our framework and tool as we expected.
{"title":"STATETest: An Automatic Test Case Generation Framework for State Transition Testing","authors":"Adisak Intana, Arthiyaporn Sawedsuthiphan","doi":"10.1109/ECTI-CON58255.2023.10153308","DOIUrl":"https://doi.org/10.1109/ECTI-CON58255.2023.10153308","url":null,"abstract":"This paper proposes a novel of automatic test case generation framework, STATETest to enhance the current practice of software testing. The framework implements the state transition testing technique that provides the environment to generate test cases from the state machine diagram. The standard XML structure containing various states and their corresponding transition is extracted and generated into the test case matrix and state tree, before they are used to generate test cases. This includes in the case of valid and invalid transitions. The degree of testing coverage is calculated during each test case is created to ensure that the generated test cases cover all possible testing scenarios. The developed tool according to the framework demonstrates the effectiveness and usefulness of our proposed framework. The experimental evaluation with three close-to-realistic case studies confirms the beneficial contribution of our framework and tool as we expected.","PeriodicalId":340768,"journal":{"name":"2023 20th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123424601","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 : 2023-05-09DOI: 10.1109/ECTI-CON58255.2023.10153258
K. Chaiprathum, S. Udomsiri, S. Phrompichai
This paper presents to use an orthogonal property of code for identifying base station and users in a cellular network. In addition, the principle of semi-blinds is applied with LS algorithm to estimate fading channel and reduce the effect of pilot contamination. The mixing parameter combines the coefficients of weight vector obtained from the pilot signal and the data. The simulation results confirm that the proposed technique can improve performance achievable downlink rate higher than that of both the LS with code for identifying base station and conventional LS algorithms.
{"title":"Adaptive Semi-Blind Receiver for TDD Massive MIMO Systems","authors":"K. Chaiprathum, S. Udomsiri, S. Phrompichai","doi":"10.1109/ECTI-CON58255.2023.10153258","DOIUrl":"https://doi.org/10.1109/ECTI-CON58255.2023.10153258","url":null,"abstract":"This paper presents to use an orthogonal property of code for identifying base station and users in a cellular network. In addition, the principle of semi-blinds is applied with LS algorithm to estimate fading channel and reduce the effect of pilot contamination. The mixing parameter combines the coefficients of weight vector obtained from the pilot signal and the data. The simulation results confirm that the proposed technique can improve performance achievable downlink rate higher than that of both the LS with code for identifying base station and conventional LS algorithms.","PeriodicalId":340768,"journal":{"name":"2023 20th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126912545","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 : 2023-05-09DOI: 10.1109/ECTI-CON58255.2023.10153354
Damrongsak Arunyagool, K. Chooruang, Suttipat Srisuk
This paper proposes the inspection and identification of individual appliances using analysis of their real and reactive power. This is achieved using an electric meter connected to the circuit that supplies each appliance, without intrusion. The measurement sends the values of voltage-current for each appliance, which are then used to calculate the instantaneous power imported, including real and reactive power, and power factor. After that, experimental identification and inspection of the condition of each electrical appliance is conducted by turning on the appliance to work simultaneously with measurement of the electrical circuit that supplies all the appliances in aggregate. The experimental results were conducted on electrical appliances in residential and showed that the instantaneous power waveform of each device has feature differences, while the real and reactive power, and power factor have only slight differences.
{"title":"NILM Electrical Appliances Inspection and Identification Using Real and Reactive Power","authors":"Damrongsak Arunyagool, K. Chooruang, Suttipat Srisuk","doi":"10.1109/ECTI-CON58255.2023.10153354","DOIUrl":"https://doi.org/10.1109/ECTI-CON58255.2023.10153354","url":null,"abstract":"This paper proposes the inspection and identification of individual appliances using analysis of their real and reactive power. This is achieved using an electric meter connected to the circuit that supplies each appliance, without intrusion. The measurement sends the values of voltage-current for each appliance, which are then used to calculate the instantaneous power imported, including real and reactive power, and power factor. After that, experimental identification and inspection of the condition of each electrical appliance is conducted by turning on the appliance to work simultaneously with measurement of the electrical circuit that supplies all the appliances in aggregate. The experimental results were conducted on electrical appliances in residential and showed that the instantaneous power waveform of each device has feature differences, while the real and reactive power, and power factor have only slight differences.","PeriodicalId":340768,"journal":{"name":"2023 20th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125928079","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 : 2023-05-09DOI: 10.1109/ECTI-CON58255.2023.10153306
N. Bhanuprabha, S. Piyasawatwong, N. Chayopitak, R. Pupadubsin, W. Kongprawechnon
In this paper, a voltage PWM control strategy for reducing acoustic vibration and noise in Switched Reluctance Motor (SRM) is proposed and investigated. At low speed, a sudden change of voltage control causes a sudden change in the attraction force resulting in vibration of SRM. The proposed technique is a five-stage voltage Pulse-Width Modulation (PWM) control method that reduces the rate of change of voltage during the current commutation period. The comparative simulation results show a significant reduction in vibration, while effectively maintain the other control objectives in desired speed and desired phase currents with slight increase of copper losses by 1.16%.
{"title":"An Investigation of Vibration Reduction in SRM Using Improved Active Cancellation Method","authors":"N. Bhanuprabha, S. Piyasawatwong, N. Chayopitak, R. Pupadubsin, W. Kongprawechnon","doi":"10.1109/ECTI-CON58255.2023.10153306","DOIUrl":"https://doi.org/10.1109/ECTI-CON58255.2023.10153306","url":null,"abstract":"In this paper, a voltage PWM control strategy for reducing acoustic vibration and noise in Switched Reluctance Motor (SRM) is proposed and investigated. At low speed, a sudden change of voltage control causes a sudden change in the attraction force resulting in vibration of SRM. The proposed technique is a five-stage voltage Pulse-Width Modulation (PWM) control method that reduces the rate of change of voltage during the current commutation period. The comparative simulation results show a significant reduction in vibration, while effectively maintain the other control objectives in desired speed and desired phase currents with slight increase of copper losses by 1.16%.","PeriodicalId":340768,"journal":{"name":"2023 20th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128209350","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 : 2023-05-09DOI: 10.1109/ECTI-CON58255.2023.10153166
K. Phaebua, T. Lertwiriyaprapa, D. Torrungrueng
A Near-field (NF) extrapolation study for cylindrical near-field to far-field transformations is presented in this paper. The NF extrapolation techniques are studied in this work including the linear technique, nearest data technique, and piecewise cubic Hermite interpolating polynomial (PCHIP) technique, in order to reduce the effect of NF truncation data on FF antenna radiation pattern error. The cylindrical wave expansion with trapezoidal rule numerical integration is employed in the NF-FF transformation algorithm. In the study, NF data of the seven-patch array antenna is simulated by the commercial simulation program, where the NF sampling length of the cylindrical scan of 1.6 meters is employed. The NF extrapolation is applied to increase the NF sampling length of the cylindrical scan from 1.6 meters to 2.4 meters. It is found that the far side-lobe accuracy of AUT FF radiation patterns from the proposed technique using linear extrapolation is improved. The far side-lobe FF antenna radiation pattern error is reduced. The truncated scanning length of NF data provides less time-consuming NF data collection. The FF antenna radiation pattern error will be reduced by using appropriate NF extrapolation techniques.
{"title":"Near-field Extrapolation Study for Cylindrical Nearfield to Far-field Transformations","authors":"K. Phaebua, T. Lertwiriyaprapa, D. Torrungrueng","doi":"10.1109/ECTI-CON58255.2023.10153166","DOIUrl":"https://doi.org/10.1109/ECTI-CON58255.2023.10153166","url":null,"abstract":"A Near-field (NF) extrapolation study for cylindrical near-field to far-field transformations is presented in this paper. The NF extrapolation techniques are studied in this work including the linear technique, nearest data technique, and piecewise cubic Hermite interpolating polynomial (PCHIP) technique, in order to reduce the effect of NF truncation data on FF antenna radiation pattern error. The cylindrical wave expansion with trapezoidal rule numerical integration is employed in the NF-FF transformation algorithm. In the study, NF data of the seven-patch array antenna is simulated by the commercial simulation program, where the NF sampling length of the cylindrical scan of 1.6 meters is employed. The NF extrapolation is applied to increase the NF sampling length of the cylindrical scan from 1.6 meters to 2.4 meters. It is found that the far side-lobe accuracy of AUT FF radiation patterns from the proposed technique using linear extrapolation is improved. The far side-lobe FF antenna radiation pattern error is reduced. The truncated scanning length of NF data provides less time-consuming NF data collection. The FF antenna radiation pattern error will be reduced by using appropriate NF extrapolation techniques.","PeriodicalId":340768,"journal":{"name":"2023 20th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132076051","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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