Pub Date : 2020-11-18DOI: 10.1109/ICRAMET51080.2020.9298630
P. Khotimah, Andri Fachrur Rozie, Ekasari Nugraheni, Andria Arisal, W. Suwarningsih, A. Purwarianti
Dengue fever currently has been a hyperendemic infectious disease in Indonesia. Early detection ability of the dengue fever events are essential for a timely and effective response to prevent outbreaks. This paper presents dengue fever event detection using online news. A previous study conducted an event detection task from sentences using word frequency burst to detect an ongoing event. However, news do not only report about the event (i.e., the event of dengue fever case) but also information regarding the disease. This paper focuses on detecting an event of dengue fever from online news. An assessment of different deep learning models is reported in this paper. Using k-fold cross validation, convolutional neural network (CNN) achieved the best performance (in average, test accuracy: 80.019%, precision: 78.561%, recall: 77.747%, and f1-score: 77.234%).
{"title":"Deep Learning for Dengue Fever Event Detection Using Online News","authors":"P. Khotimah, Andri Fachrur Rozie, Ekasari Nugraheni, Andria Arisal, W. Suwarningsih, A. Purwarianti","doi":"10.1109/ICRAMET51080.2020.9298630","DOIUrl":"https://doi.org/10.1109/ICRAMET51080.2020.9298630","url":null,"abstract":"Dengue fever currently has been a hyperendemic infectious disease in Indonesia. Early detection ability of the dengue fever events are essential for a timely and effective response to prevent outbreaks. This paper presents dengue fever event detection using online news. A previous study conducted an event detection task from sentences using word frequency burst to detect an ongoing event. However, news do not only report about the event (i.e., the event of dengue fever case) but also information regarding the disease. This paper focuses on detecting an event of dengue fever from online news. An assessment of different deep learning models is reported in this paper. Using k-fold cross validation, convolutional neural network (CNN) achieved the best performance (in average, test accuracy: 80.019%, precision: 78.561%, recall: 77.747%, and f1-score: 77.234%).","PeriodicalId":228482,"journal":{"name":"2020 International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications (ICRAMET)","volume":"139 1‐2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113953730","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 : 2020-11-18DOI: 10.1109/ICRAMET51080.2020.9298594
J. Prakosa, E. Kurniawan, H. Adinanta, S. Suryadi, Purwowibowo Purwowibowo
The low fluid flow rate is usually used in beverage industry, rain gauge and fuel systems. The good quality of product through accurate flow measurement is produced by excellent control systems. Moreover, the control theory from robust to adaptive perspective can improve the control systems quality from its model. The flow meter can be used as feedback elements through water fluid. Furthermore, solenoid valve and diaphragm pump can be used as actuator. The purpose of this research is to develop identification model of control systems from experimental plant behavior of low fluid flow rate control. From the experiments, the actuator of diaphragm pump has more control ability than solenoid valve, particularly due to its stability. The plant needs time around after 70 s to stabilize the flow rate. The relation of voltage input of pump and flow rate output can be written as best transfer function model on number of poles and zeroes by 2 respectively.
{"title":"Experimental Based Identification Model of Low Fluid Flow Rate Control Systems","authors":"J. Prakosa, E. Kurniawan, H. Adinanta, S. Suryadi, Purwowibowo Purwowibowo","doi":"10.1109/ICRAMET51080.2020.9298594","DOIUrl":"https://doi.org/10.1109/ICRAMET51080.2020.9298594","url":null,"abstract":"The low fluid flow rate is usually used in beverage industry, rain gauge and fuel systems. The good quality of product through accurate flow measurement is produced by excellent control systems. Moreover, the control theory from robust to adaptive perspective can improve the control systems quality from its model. The flow meter can be used as feedback elements through water fluid. Furthermore, solenoid valve and diaphragm pump can be used as actuator. The purpose of this research is to develop identification model of control systems from experimental plant behavior of low fluid flow rate control. From the experiments, the actuator of diaphragm pump has more control ability than solenoid valve, particularly due to its stability. The plant needs time around after 70 s to stabilize the flow rate. The relation of voltage input of pump and flow rate output can be written as best transfer function model on number of poles and zeroes by 2 respectively.","PeriodicalId":228482,"journal":{"name":"2020 International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications (ICRAMET)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116499340","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 : 2020-11-18DOI: 10.1109/ICRAMET51080.2020.9298626
D. Haryanto, Levy Olivia Nur, A. Munir
The reflector has a role in enhancing the return loss of antenna becoming a selective frequency. In this paper, an artificial magnetic conductor (AMC) based reflector composed of slotted square rings is proposed and characterized using a printed dipole antenna. The used of AMC layer which has high surface impedance is expected to reduce the distance between the antenna and the reflector yielding a compact device. The configuration of AMC reflector and printed dipole antenna is designed each on an RO3003 dielectric substrate with the relative permittivity of 3.0 and the thickness of 0.5 mm. The configuration is intended to be used for wireless communication at the Industrial, Scientific, and Medical (ISM) band frequency of 2.4 GHz. The proposed reflector is constructed by a 3×3 unit cell of AMC structure where each unit cell is composed of slotted square rings configured concentrically. Meanwhile, the characterization is carried out by varying the parameters of AMC reflector and printed dipole antenna. The result shows the configuration with the distance between the antenna and the reflector of λ/23, or around 5 mm, could produce a significant value of reflection coefficient (S11) among others. This configuration could achieve the S11 value up to –24 dB at the frequency of 1.98 GHz.
{"title":"Characterization of Slotted Square Rings AMC Reflector Using Printed Dipole Antenna","authors":"D. Haryanto, Levy Olivia Nur, A. Munir","doi":"10.1109/ICRAMET51080.2020.9298626","DOIUrl":"https://doi.org/10.1109/ICRAMET51080.2020.9298626","url":null,"abstract":"The reflector has a role in enhancing the return loss of antenna becoming a selective frequency. In this paper, an artificial magnetic conductor (AMC) based reflector composed of slotted square rings is proposed and characterized using a printed dipole antenna. The used of AMC layer which has high surface impedance is expected to reduce the distance between the antenna and the reflector yielding a compact device. The configuration of AMC reflector and printed dipole antenna is designed each on an RO3003 dielectric substrate with the relative permittivity of 3.0 and the thickness of 0.5 mm. The configuration is intended to be used for wireless communication at the Industrial, Scientific, and Medical (ISM) band frequency of 2.4 GHz. The proposed reflector is constructed by a 3×3 unit cell of AMC structure where each unit cell is composed of slotted square rings configured concentrically. Meanwhile, the characterization is carried out by varying the parameters of AMC reflector and printed dipole antenna. The result shows the configuration with the distance between the antenna and the reflector of λ/23, or around 5 mm, could produce a significant value of reflection coefficient (S11) among others. This configuration could achieve the S11 value up to –24 dB at the frequency of 1.98 GHz.","PeriodicalId":228482,"journal":{"name":"2020 International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications (ICRAMET)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123624001","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 : 2020-11-18DOI: 10.1109/ICRAMET51080.2020.9298610
Muhammad Farhan Maulana, N. Ismail, Eki Ahmad Zaki Hamidi, Taufiqqurrachman Taufiqqurrachman, H. Nusantara, A. Munir
This paper presents the design and characterization of frequency-reconfigurable multiband microstrip antenna which is composed of artificial magnetic conductor (AMC). The use of AMC is aimed to generate other resonant frequencies so as to get a multiple band frequency response. In order to reconfigure the frequency response of the antenna, some varactor diodes of BB837 type were incorporated into the AMC structure which was made by ring resonators. The results show that the proposed microstrip antenna can produce multiband frequency responses with the fixed resonant frequency at 1.975 GHz and the reconfigurable one between 1.65 GHz to 1.7 GHz.
{"title":"Frequency Reconfigurable Multiband Microstrip Antenna Composed of Artificial Magnetic Conductor","authors":"Muhammad Farhan Maulana, N. Ismail, Eki Ahmad Zaki Hamidi, Taufiqqurrachman Taufiqqurrachman, H. Nusantara, A. Munir","doi":"10.1109/ICRAMET51080.2020.9298610","DOIUrl":"https://doi.org/10.1109/ICRAMET51080.2020.9298610","url":null,"abstract":"This paper presents the design and characterization of frequency-reconfigurable multiband microstrip antenna which is composed of artificial magnetic conductor (AMC). The use of AMC is aimed to generate other resonant frequencies so as to get a multiple band frequency response. In order to reconfigure the frequency response of the antenna, some varactor diodes of BB837 type were incorporated into the AMC structure which was made by ring resonators. The results show that the proposed microstrip antenna can produce multiband frequency responses with the fixed resonant frequency at 1.975 GHz and the reconfigurable one between 1.65 GHz to 1.7 GHz.","PeriodicalId":228482,"journal":{"name":"2020 International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications (ICRAMET)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125952157","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 : 2020-11-18DOI: 10.1109/ICRAMET51080.2020.9298588
Akbari Indra Basuki, D. Rosiyadi, Iwan Setiawan
Path-tracking is essential to provide complete information regarding network breach incidents. It records the direction of the attack and its source of origin thus giving the network manager proper information for the next responses. Nevertheless, the existing path-tracking implementations expose the network topology and routing configurations. In this paper, we propose a privacy-aware path-tracking which mystifies network configurations using in-packet bloom filter. We apply our method by using P4 switch to supports a fine-grain (per-packet) path-tracking with dynamic adaptability via in-switch bloom filter computation. We use a hybrid scheme which consists of a destination-based logging and a path finger print-based marking to minimize the redundant path inferring caused by the bloom filter’s false positive. For evaluation, we emulate the network using Mininet and BMv2 software switch. We deploy a source routing mechanism to run the evaluations using a limited testbed machine implementing Rocketfuel topology. By using the hybrid marking and logging technique, we can reduce the redundant path to zero percent, ensuring no-collision in the path-inferring. Based on the experiments, it has a lower space efficiency (56 bit) compared with the bloom filter-only solution (128 bit). Our proposed method guarantees that the recorded path remains secret unless the secret keys of every switch are known.
{"title":"Preserving Network Privacy on Fine-grain Path-tracking Using P4-based SDN","authors":"Akbari Indra Basuki, D. Rosiyadi, Iwan Setiawan","doi":"10.1109/ICRAMET51080.2020.9298588","DOIUrl":"https://doi.org/10.1109/ICRAMET51080.2020.9298588","url":null,"abstract":"Path-tracking is essential to provide complete information regarding network breach incidents. It records the direction of the attack and its source of origin thus giving the network manager proper information for the next responses. Nevertheless, the existing path-tracking implementations expose the network topology and routing configurations. In this paper, we propose a privacy-aware path-tracking which mystifies network configurations using in-packet bloom filter. We apply our method by using P4 switch to supports a fine-grain (per-packet) path-tracking with dynamic adaptability via in-switch bloom filter computation. We use a hybrid scheme which consists of a destination-based logging and a path finger print-based marking to minimize the redundant path inferring caused by the bloom filter’s false positive. For evaluation, we emulate the network using Mininet and BMv2 software switch. We deploy a source routing mechanism to run the evaluations using a limited testbed machine implementing Rocketfuel topology. By using the hybrid marking and logging technique, we can reduce the redundant path to zero percent, ensuring no-collision in the path-inferring. Based on the experiments, it has a lower space efficiency (56 bit) compared with the bloom filter-only solution (128 bit). Our proposed method guarantees that the recorded path remains secret unless the secret keys of every switch are known.","PeriodicalId":228482,"journal":{"name":"2020 International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications (ICRAMET)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126814270","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 : 2020-11-18DOI: 10.1109/ICRAMET51080.2020.9298676
Nova Hadi Lestriandoko, Diah Harnoni Apriyanti, E. Prakasa
The image captured by the surveillance camera at a large distance yields a low-resolution image. Commonly, researchers recognize a face from a distance by improving the quality of the low-resolution image. After the image has been upgraded, it will be compared with the high-resolution face image saved on the database. But in this paper, the inverse is applied. The model is made by downgrading the quality of the high-resolution image in order to make it similar to the low- resolution image. Some methods in digital image formation are used to make the model. Some experiments also conducted to compare the model with images obtained by the real cameras at various distances. In order to optimize the model, some parameters were used to tune some steps of low-resolution modeling, i.e., scaling, kernel size of the filter, gamma, and compression quality. The result shows that the proposed model can improve the recognition performance on SC face.
{"title":"Modeling of Low-Resolution Face Imaging","authors":"Nova Hadi Lestriandoko, Diah Harnoni Apriyanti, E. Prakasa","doi":"10.1109/ICRAMET51080.2020.9298676","DOIUrl":"https://doi.org/10.1109/ICRAMET51080.2020.9298676","url":null,"abstract":"The image captured by the surveillance camera at a large distance yields a low-resolution image. Commonly, researchers recognize a face from a distance by improving the quality of the low-resolution image. After the image has been upgraded, it will be compared with the high-resolution face image saved on the database. But in this paper, the inverse is applied. The model is made by downgrading the quality of the high-resolution image in order to make it similar to the low- resolution image. Some methods in digital image formation are used to make the model. Some experiments also conducted to compare the model with images obtained by the real cameras at various distances. In order to optimize the model, some parameters were used to tune some steps of low-resolution modeling, i.e., scaling, kernel size of the filter, gamma, and compression quality. The result shows that the proposed model can improve the recognition performance on SC face.","PeriodicalId":228482,"journal":{"name":"2020 International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications (ICRAMET)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114631859","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 : 2020-11-18DOI: 10.1109/ICRAMET51080.2020.9298629
Nurul Fadhillah, Levy Olivia Nur, A. Munir
The use of artificial magnetic conductor (AMC) on microstrip antenna design allows the dimension of antenna to be more compact so that it is beneficial for the use in portable communication devices. Apart from its small size, the microstrip antenna can generate multiple frequency response which is more cost effective due to its suitability for several applications which have appropriate frequency specifications. In this paper, an AMC-based tunable multi-band microstrip antenna is designed by incorporating external components, namely varactor diode, into the AMC structure. The incorporation of varactor diodes with varied reverse DC bias voltages can affect the capacitance value on the antenna. Two layers of 1.6 mm thick FR4 Epoxy dielectric substrate are used for designing the antenna with the dimension of 51 mm × 51 mm × 3.2 mm. The characterization results show that the proposed microstrip antenna could produce tunable multi-band frequency response in the frequency range of 1.575 GHz to 2.595 GHz along with the reverse DC bias voltage variation. The higher the applied reverse DC bias voltage across the varactor diode, the smaller the capacitance value yielding the higher the resonant frequency.
{"title":"Tunable Multi-Band Microstrip Antenna Based on Artificial Magnetic Conductor","authors":"Nurul Fadhillah, Levy Olivia Nur, A. Munir","doi":"10.1109/ICRAMET51080.2020.9298629","DOIUrl":"https://doi.org/10.1109/ICRAMET51080.2020.9298629","url":null,"abstract":"The use of artificial magnetic conductor (AMC) on microstrip antenna design allows the dimension of antenna to be more compact so that it is beneficial for the use in portable communication devices. Apart from its small size, the microstrip antenna can generate multiple frequency response which is more cost effective due to its suitability for several applications which have appropriate frequency specifications. In this paper, an AMC-based tunable multi-band microstrip antenna is designed by incorporating external components, namely varactor diode, into the AMC structure. The incorporation of varactor diodes with varied reverse DC bias voltages can affect the capacitance value on the antenna. Two layers of 1.6 mm thick FR4 Epoxy dielectric substrate are used for designing the antenna with the dimension of 51 mm × 51 mm × 3.2 mm. The characterization results show that the proposed microstrip antenna could produce tunable multi-band frequency response in the frequency range of 1.575 GHz to 2.595 GHz along with the reverse DC bias voltage variation. The higher the applied reverse DC bias voltage across the varactor diode, the smaller the capacitance value yielding the higher the resonant frequency.","PeriodicalId":228482,"journal":{"name":"2020 International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications (ICRAMET)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127913150","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 : 2020-11-18DOI: 10.1109/ICRAMET51080.2020.9298622
S. Phaiboon, P. Phokharatkul
This paper presents break point distance path loss models with equivalence floor for 5G millimeter wave (mmWave). The proposed model consists of dual slope path losses which are in distances before and after breakpoint together with additional wall attenuation loss. In case of non-line-of-sight (NLOS), shadowing caused by obstacles will appear with equivalent floor and raise ground reflection caused by furniture and exiting multi-wall attenuation loss. Comparison between two types of buildings show that the equivalence floor and total wall attenuation provide a characteristic of the buildings which influence on wave propagation as well.
{"title":"Break Point Distance Path Loss Model for Indoor Wireless Communications with Equivalent Floor","authors":"S. Phaiboon, P. Phokharatkul","doi":"10.1109/ICRAMET51080.2020.9298622","DOIUrl":"https://doi.org/10.1109/ICRAMET51080.2020.9298622","url":null,"abstract":"This paper presents break point distance path loss models with equivalence floor for 5G millimeter wave (mmWave). The proposed model consists of dual slope path losses which are in distances before and after breakpoint together with additional wall attenuation loss. In case of non-line-of-sight (NLOS), shadowing caused by obstacles will appear with equivalent floor and raise ground reflection caused by furniture and exiting multi-wall attenuation loss. Comparison between two types of buildings show that the equivalence floor and total wall attenuation provide a characteristic of the buildings which influence on wave propagation as well.","PeriodicalId":228482,"journal":{"name":"2020 International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications (ICRAMET)","volume":"92 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133719404","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 : 2020-11-18DOI: 10.1109/ICRAMET51080.2020.9298570
Muthia Hanifah, Levy Olivia Nur, A. Munir
In this paper, the absorption characteristics of tunable electromagnetics (EM) wave absorber developed using artificial magnetic conductor (AMC) is investigated by incorporating varactor diode into the structure. The proposed wave absorber configured by 5×5 cells of AMC structure is designed on an FR4 epoxy dielectric substrate with the thickness of 1.6 mm. Each cell which is composed of a square patch has the dimension of 20.8 mm × 20.8 mm, hence the total dimension of AMC-based wave absorber is 104 mm × 104 mm. To gain a tunable frequency response with the optimum absorptivity, a varactor diode with varied DC bias voltage is incorporated midway along the square patch in parallel to the incident wave. The equivalent circuit of varactor diode is used to characterize the performance of proposed tunable AMC-based wave absorber. Prior characterizing the effect of varactor diode incorporation, parametric studies upon the characteristic of AMC-based wave absorber is investigated by incorporating some passive elements such as resistor and capacitor. The characterization results show that the frequency response of tunable AMC-based wave absorber can be tuned from the frequency of 1.55 GHz to 2.51 GHz which corresponds to the DC bias voltages variation of varactor diode from 10V to 0V.
本文研究了在人造磁导体(AMC)结构中加入变容二极管的可调谐电磁吸波器的吸收特性。在厚度为1.6 mm的FR4环氧介电基板上设计了由AMC结构5×5单元组成的吸波器。每个单元由正方形贴片组成，尺寸为20.8 mm × 20.8 mm，因此基于amc的吸波器的总尺寸为104 mm × 104 mm。为了获得具有最佳吸收率的可调谐频率响应，在与入射波平行的方形贴片中间加入一个具有可变直流偏置电压的变容二极管。利用变容二极管等效电路对所提出的可调谐amc吸波器进行了性能表征。在对变容二极管的影响进行表征之前，通过引入电阻和电容等无源元件，对基于amc的吸波器的特性进行了参数化研究。表征结果表明，基于amc的可调谐吸波器的频率响应可以从1.55 GHz调谐到2.51 GHz，对应于变容二极管直流偏置电压从10V到0V的变化。
{"title":"Absorption Characteristics of Tunable AMC-based Wave Absorber using Varactor Diode","authors":"Muthia Hanifah, Levy Olivia Nur, A. Munir","doi":"10.1109/ICRAMET51080.2020.9298570","DOIUrl":"https://doi.org/10.1109/ICRAMET51080.2020.9298570","url":null,"abstract":"In this paper, the absorption characteristics of tunable electromagnetics (EM) wave absorber developed using artificial magnetic conductor (AMC) is investigated by incorporating varactor diode into the structure. The proposed wave absorber configured by 5×5 cells of AMC structure is designed on an FR4 epoxy dielectric substrate with the thickness of 1.6 mm. Each cell which is composed of a square patch has the dimension of 20.8 mm × 20.8 mm, hence the total dimension of AMC-based wave absorber is 104 mm × 104 mm. To gain a tunable frequency response with the optimum absorptivity, a varactor diode with varied DC bias voltage is incorporated midway along the square patch in parallel to the incident wave. The equivalent circuit of varactor diode is used to characterize the performance of proposed tunable AMC-based wave absorber. Prior characterizing the effect of varactor diode incorporation, parametric studies upon the characteristic of AMC-based wave absorber is investigated by incorporating some passive elements such as resistor and capacitor. The characterization results show that the frequency response of tunable AMC-based wave absorber can be tuned from the frequency of 1.55 GHz to 2.51 GHz which corresponds to the DC bias voltages variation of varactor diode from 10V to 0V.","PeriodicalId":228482,"journal":{"name":"2020 International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications (ICRAMET)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121106696","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 : 2020-11-18DOI: 10.1109/ICRAMET51080.2020.9298584
Henry Probo Santoso, Joko Slamet Saputro, H. Maghfiroh, Mochamad Mardi Marta Dinata
The need for autonomous robots has recently increased, along with the rapid development of robotics technology. The ability to navigate without the need of human intervention, is one of the advantages of autonomous robots. To make an autonomous robot, a robot with high efficiency, flexibility, and a reliable navigation system are needed. High efficiency and flexibility can be handled with the use of a two-wheeled self-balancing robot. A reliable navigation system can be achieved by using the ROS (robot operating system) platform. The research produces virtual robots, virtual maps, and virtual sensors on simulations in the GAZEBO application, which can be visualized in RVIZ. Map development and navigation system usage, run in the ROS system, producing speed data that sent to GAZEBO simulations and balancing robot in the real world. In this paper, the experiments are divide into two, simulation and real, with two different destinations coordinates, straight (1.0, 0.0) and curved (2.2, -1.0). The tracking simulation test shows that the virtual robot can reach the first destination, with errors averages -0.084 m on X-axis and -0.01 m on Y-axis. The second destination gives error averages -0.052 m on X-axis and -0.05 m on Y-axis. The real tracking test shows the balancing robot can receive speed data from the ROS system, to move towards the destination point based on the virtual map and virtual sensor. The real tracking test gives an error averages 0.046 m on X-axis and 0.02 m on Y-axis, in the first destination. On the second destination, the error averages are 0.044 m on X-axis and 0.38 m on Y-axis. The experiments show that the robot can go to the destination point autonomously with virtual map and virtual sensor.
随着机器人技术的快速发展，对自主机器人的需求近年来有所增加。无需人工干预的导航能力是自主机器人的优势之一。为了制造自主机器人，机器人需要具有高效率、灵活性和可靠的导航系统。使用两轮自平衡机器人可以实现高效率和灵活性。利用ROS(机器人操作系统)平台可以实现可靠的导航系统。该研究在GAZEBO应用程序中模拟生成虚拟机器人、虚拟地图和虚拟传感器，这些可以在RVIZ中可视化。地图开发和导航系统的使用，在ROS系统中运行，产生的速度数据发送到GAZEBO模拟和平衡现实世界中的机器人。本文将实验分为仿真和真实两部分，目标坐标分别为直线(1.0,0.0)和曲线(2.2，-1.0)。跟踪仿真测试表明，虚拟机器人可以到达第一目的地，x轴平均误差为-0.084 m, y轴平均误差为-0.01 m。第二个目的地给出x轴上-0.052 m和y轴上-0.05 m的平均误差。实际跟踪试验表明，平衡机器人可以接收到ROS系统的速度数据，根据虚拟地图和虚拟传感器向目的地移动。在第一个目的地，实际跟踪测试给出了x轴上0.046 m和y轴上0.02 m的平均误差。在第二个目的地上，x轴误差平均值为0.044 m, y轴误差平均值为0.38 m。实验表明，利用虚拟地图和虚拟传感器，机器人可以自主到达目的地。
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