Pub Date : 2015-10-01DOI: 10.1109/ATC.2015.7388368
Tu Huynh-Kha, T. Le-Tien, Synh Ha-Viet-Uyen, Khoa Huynh-Van
The paper presents the efficiency of applying DWT into copy-move image forgery detection by developing an algorithm which combines DWT and feature extraction to improve the computational time compared to the algorithm without DWT. With the characteristic of invariant to rotation, Zernike Moments are used to extract the features of image blocks. The novelty of this article is not only combination of multiscale and features extraction but also the modification of parameters of Zernike moments in the proposed algorithm. The tested image is reduced dimension by DWT before looking for the similar regions as traces of copy-move forgery manipulation. Upon the principle that most of forged information concentrate at the low frequencies, the approximation sub-band (LL) is considered for detection. This band is then split into 16×16 overlapping blocks from which the modified Zernike moments are extracted to be block feature vectors with higher exactness than the traditional Zernike moments. These vectors are arranged into matrix and sorted lexicographically to find the similar vectors from group of consecutive vectors having correlation coefficients of 0.95. The fact that neighbor blocks may be similar and the copied regions can be comprised by many blocks and requires a distance to make sure that they are really similar, not neighbors. Simulation results running in Matlab R2013a proves the feasibility and efficiency of the proposed algorithm.
{"title":"The efficiency of applying DWT and feature extraction into copy-move images detection","authors":"Tu Huynh-Kha, T. Le-Tien, Synh Ha-Viet-Uyen, Khoa Huynh-Van","doi":"10.1109/ATC.2015.7388368","DOIUrl":"https://doi.org/10.1109/ATC.2015.7388368","url":null,"abstract":"The paper presents the efficiency of applying DWT into copy-move image forgery detection by developing an algorithm which combines DWT and feature extraction to improve the computational time compared to the algorithm without DWT. With the characteristic of invariant to rotation, Zernike Moments are used to extract the features of image blocks. The novelty of this article is not only combination of multiscale and features extraction but also the modification of parameters of Zernike moments in the proposed algorithm. The tested image is reduced dimension by DWT before looking for the similar regions as traces of copy-move forgery manipulation. Upon the principle that most of forged information concentrate at the low frequencies, the approximation sub-band (LL) is considered for detection. This band is then split into 16×16 overlapping blocks from which the modified Zernike moments are extracted to be block feature vectors with higher exactness than the traditional Zernike moments. These vectors are arranged into matrix and sorted lexicographically to find the similar vectors from group of consecutive vectors having correlation coefficients of 0.95. The fact that neighbor blocks may be similar and the copied regions can be comprised by many blocks and requires a distance to make sure that they are really similar, not neighbors. Simulation results running in Matlab R2013a proves the feasibility and efficiency of the proposed algorithm.","PeriodicalId":142783,"journal":{"name":"2015 International Conference on Advanced Technologies for Communications (ATC)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121898594","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 : 2015-10-01DOI: 10.1109/ATC.2015.7388319
O. Oki, P. Mudali, M. Adigun
Internet connectivity in most rural African areas has been viewed as a major challenge due to lack of reliable power, scarcity of network expertise and expensive installation of network equipment. With the rapid development of wireless technologies, Wireless Mesh Network (WMN) has emerged as a promising networking infrastructure, bridging the digital divide between the urban and rural areas. However, during the deployment of a WMN, the placement of Mesh Access Points (MAPs) is an important design issue which drastically influences the network performance. The MAPs placement problem has been investigated and various placement methods have been proposed. However, the effectiveness of the existing MAPs placement schemes have not been evaluated and compared in Rural Settlement Patterns. Hence, this paper analyses the performance of different MAPs placement schemes in four rural settlement patterns: dispersed, nucleated, isolated and linear settlement pattern. The simulation result shows that the Hill Climbing placement scheme in the dispersed and nucleated settlement patterns outperformed other schemes in the achieved throughput, packet delivery ratio and end-to-end delay. While Virtual force placement scheme in the linear settlement pattern outperformed others and Time-efficient Local Search outperforms other schemes in the isolated settlement pattern.
{"title":"Performance analysis of Mesh Access Points placement schemes using rural settlement patterns","authors":"O. Oki, P. Mudali, M. Adigun","doi":"10.1109/ATC.2015.7388319","DOIUrl":"https://doi.org/10.1109/ATC.2015.7388319","url":null,"abstract":"Internet connectivity in most rural African areas has been viewed as a major challenge due to lack of reliable power, scarcity of network expertise and expensive installation of network equipment. With the rapid development of wireless technologies, Wireless Mesh Network (WMN) has emerged as a promising networking infrastructure, bridging the digital divide between the urban and rural areas. However, during the deployment of a WMN, the placement of Mesh Access Points (MAPs) is an important design issue which drastically influences the network performance. The MAPs placement problem has been investigated and various placement methods have been proposed. However, the effectiveness of the existing MAPs placement schemes have not been evaluated and compared in Rural Settlement Patterns. Hence, this paper analyses the performance of different MAPs placement schemes in four rural settlement patterns: dispersed, nucleated, isolated and linear settlement pattern. The simulation result shows that the Hill Climbing placement scheme in the dispersed and nucleated settlement patterns outperformed other schemes in the achieved throughput, packet delivery ratio and end-to-end delay. While Virtual force placement scheme in the linear settlement pattern outperformed others and Time-efficient Local Search outperforms other schemes in the isolated settlement pattern.","PeriodicalId":142783,"journal":{"name":"2015 International Conference on Advanced Technologies for Communications (ATC)","volume":"490 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116538280","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 : 2015-10-01DOI: 10.1109/ATC.2015.7388406
N. T. Tuan, Yoshihide Yamada, N. Dinh, N. Michishita
Normal-mode helical antennas (NMHA) are well known for achieving high antenna efficiencies in very small sizes when antenna structures are tuned to self-resonant situations. The design equation determining self-resonant structures were developed in free space conditions. However, in practically, NMHA mostly used dielectric or magnetic materials as cores. The design equation for these cases is not studied yet. In this paper, fundamental self-resonant structures are studied for NMHA placed in dielectric or magnetic material. In order to obtain correct calculation results, calculation models of an commercial electromagnetic simulator (FEKO) is studied. Many data for structural change from free space condition to inside materials are achieved. Moreover, input resistance and antenna efficiency changes are also obtained.
{"title":"Self-resonant structures of normal-mode helical antennas embedded in dielectric and magnetic materials","authors":"N. T. Tuan, Yoshihide Yamada, N. Dinh, N. Michishita","doi":"10.1109/ATC.2015.7388406","DOIUrl":"https://doi.org/10.1109/ATC.2015.7388406","url":null,"abstract":"Normal-mode helical antennas (NMHA) are well known for achieving high antenna efficiencies in very small sizes when antenna structures are tuned to self-resonant situations. The design equation determining self-resonant structures were developed in free space conditions. However, in practically, NMHA mostly used dielectric or magnetic materials as cores. The design equation for these cases is not studied yet. In this paper, fundamental self-resonant structures are studied for NMHA placed in dielectric or magnetic material. In order to obtain correct calculation results, calculation models of an commercial electromagnetic simulator (FEKO) is studied. Many data for structural change from free space condition to inside materials are achieved. Moreover, input resistance and antenna efficiency changes are also obtained.","PeriodicalId":142783,"journal":{"name":"2015 International Conference on Advanced Technologies for Communications (ATC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129761491","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 : 2015-10-01DOI: 10.1109/ATC.2015.7388308
Tran Quang-Huy, Tran Duc-Tan
Ultrasound tomography offers the potential for detecting of very small tumors whose sizes are smaller than the wavelength of the incident pressure wave without ionizing radiation. Based on inverse scattering technique, this imaging modality uses some material properties such as sound contrast and attenuation in order to detect small objects. One of the most commonly used methods in ultrasound tomography is the Distorted Born Iterative Method (DBIM). The compressed sensing technique was applied in the DBIM as a promising approach for the image reconstruction quality improvement. Nevertheless, the random measurement configuration of transducers in this method is very difficult to set up in practice. Therefore, in this paper, we take advantages of simpler sparse uniform measurement configuration set-up of transducers and high-quality image reconstruction of l1 non-linear regularization in sparse scattering domain. The simulation results demonstrate the high performance of the proposed approach in terms of tremendously reduced total runtime and normalized error.
{"title":"Sound contrast imaging using uniform ring configuration of transducers with reconstruction","authors":"Tran Quang-Huy, Tran Duc-Tan","doi":"10.1109/ATC.2015.7388308","DOIUrl":"https://doi.org/10.1109/ATC.2015.7388308","url":null,"abstract":"Ultrasound tomography offers the potential for detecting of very small tumors whose sizes are smaller than the wavelength of the incident pressure wave without ionizing radiation. Based on inverse scattering technique, this imaging modality uses some material properties such as sound contrast and attenuation in order to detect small objects. One of the most commonly used methods in ultrasound tomography is the Distorted Born Iterative Method (DBIM). The compressed sensing technique was applied in the DBIM as a promising approach for the image reconstruction quality improvement. Nevertheless, the random measurement configuration of transducers in this method is very difficult to set up in practice. Therefore, in this paper, we take advantages of simpler sparse uniform measurement configuration set-up of transducers and high-quality image reconstruction of l1 non-linear regularization in sparse scattering domain. The simulation results demonstrate the high performance of the proposed approach in terms of tremendously reduced total runtime and normalized error.","PeriodicalId":142783,"journal":{"name":"2015 International Conference on Advanced Technologies for Communications (ATC)","volume":"33 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131657169","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 : 2015-10-01DOI: 10.1109/ATC.2015.7388417
N. T. Sang, Vu Nguyen Binh, Truong Quang Vinh, Vu Duc Lung
This paper proposes two efficient methods along with a hardware structure for real-time video enhancement, which are specific for dedicated hardware platforms - where memory's size is limited and not totally suitable with an amount of complex computation. The presented approaches here rely on Self-enhancement technique and their important coefficients are suggested through a vast range of statistics that were made by systematically analyzing from implementations using Matlab. A hardware structure is, then, designed on FPGA based on the best proposed method. In order to demonstrate the quality of the proposed, a practical environment with a FPGA board and a real camera was also set up to evaluate. Such extensive experimental results indicate that both the proposed methods and hardware structure are effective, feasible and straightforward to apply into practice.
{"title":"Real-time video enhancement on FPGA by self-enhancement technique","authors":"N. T. Sang, Vu Nguyen Binh, Truong Quang Vinh, Vu Duc Lung","doi":"10.1109/ATC.2015.7388417","DOIUrl":"https://doi.org/10.1109/ATC.2015.7388417","url":null,"abstract":"This paper proposes two efficient methods along with a hardware structure for real-time video enhancement, which are specific for dedicated hardware platforms - where memory's size is limited and not totally suitable with an amount of complex computation. The presented approaches here rely on Self-enhancement technique and their important coefficients are suggested through a vast range of statistics that were made by systematically analyzing from implementations using Matlab. A hardware structure is, then, designed on FPGA based on the best proposed method. In order to demonstrate the quality of the proposed, a practical environment with a FPGA board and a real camera was also set up to evaluate. Such extensive experimental results indicate that both the proposed methods and hardware structure are effective, feasible and straightforward to apply into practice.","PeriodicalId":142783,"journal":{"name":"2015 International Conference on Advanced Technologies for Communications (ATC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133863960","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 : 2015-10-01DOI: 10.1109/ATC.2015.7388347
Tran Van Long, V. T. Ngan
Multivariate data visualization is an interesting research field with many applications in ubiquitous fields of sciences. Radial visualization is one of the most common information visualization techniques for visualizing multivariate data. Unfortunately, Radial visualization display different information about structures of multivariate data on the different positions of dimensional anchors on the unit circle. In this paper, we propose a method that improve the Radviz layout for class visualization of high-dimensional data. We apply the differential evolution algorithm to find the optimal dimensional anchors of the RadViz such that maximum the quality of Radial visualization for classifier data. We use the k nearest neighbors classifier for quality measurement. Our method provides an improvement visualizing class structures of high-dimensional data sets on the RadViz. We demonstrate the efficiency of our method for some data sets.
{"title":"An optimal radial layout for high dimensional data class visualization","authors":"Tran Van Long, V. T. Ngan","doi":"10.1109/ATC.2015.7388347","DOIUrl":"https://doi.org/10.1109/ATC.2015.7388347","url":null,"abstract":"Multivariate data visualization is an interesting research field with many applications in ubiquitous fields of sciences. Radial visualization is one of the most common information visualization techniques for visualizing multivariate data. Unfortunately, Radial visualization display different information about structures of multivariate data on the different positions of dimensional anchors on the unit circle. In this paper, we propose a method that improve the Radviz layout for class visualization of high-dimensional data. We apply the differential evolution algorithm to find the optimal dimensional anchors of the RadViz such that maximum the quality of Radial visualization for classifier data. We use the k nearest neighbors classifier for quality measurement. Our method provides an improvement visualizing class structures of high-dimensional data sets on the RadViz. We demonstrate the efficiency of our method for some data sets.","PeriodicalId":142783,"journal":{"name":"2015 International Conference on Advanced Technologies for Communications (ATC)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132479890","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 : 2015-10-01DOI: 10.1109/ATC.2015.7388358
P. Q. Thai, N. Thanh, S. Shigeru, Jiang Liu, Zhong Wende
In this paper, a visible light communications (VLC) system prototype using OLED was realized and tested. Using simple DPPM technique and comparator, our prototype was able to transmit up to 127.5 kbps data rate using an OLED with only 7 kHz 3 dB modulation bandwidth. Exploiting the frequency response of OLED, we were able to achieve a better data rate to modulation bandwidth ratio than other recent reports using OLED for VLC.
{"title":"127.5 kbps Transmission using OLED with 7 kHz 3dB modulation bandwidth in visible light communication system","authors":"P. Q. Thai, N. Thanh, S. Shigeru, Jiang Liu, Zhong Wende","doi":"10.1109/ATC.2015.7388358","DOIUrl":"https://doi.org/10.1109/ATC.2015.7388358","url":null,"abstract":"In this paper, a visible light communications (VLC) system prototype using OLED was realized and tested. Using simple DPPM technique and comparator, our prototype was able to transmit up to 127.5 kbps data rate using an OLED with only 7 kHz 3 dB modulation bandwidth. Exploiting the frequency response of OLED, we were able to achieve a better data rate to modulation bandwidth ratio than other recent reports using OLED for VLC.","PeriodicalId":142783,"journal":{"name":"2015 International Conference on Advanced Technologies for Communications (ATC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132677770","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 : 2015-10-01DOI: 10.1109/ATC.2015.7388359
Ngoc Chi Nguyen, T. Vu-Dinh
Tele-Radiology network is a network for remote radiology diagnosis. If Tele-Radiology can operate on the Internet, it will enhance imaging diagnostic of remote health clinics. Due to very large input data for Tele-Radiology network (CT 64 slice: 1500MB/case, MRI 1.5 Tesla: 600MB/case), it requires a load balancing mechanism to avoid traffic jam on the network. In order to deploy Tele-Radiology through the Internet without interfering Layer 1,2,3 of TCP/IP scheme, it requires a logical topology on the underlying physical TCP/IP. There isn't any research on applying de Bruijn graph as a logical topology for Tele-Radiology network yet. The MHC(d, k) (Logical network based on de Bruijn graph for Tele-Radiology) proposed in this article can be used for load balancing in Tele-Radiology and Tele-Medicine.
{"title":"A new architecture for tele-radiology networks","authors":"Ngoc Chi Nguyen, T. Vu-Dinh","doi":"10.1109/ATC.2015.7388359","DOIUrl":"https://doi.org/10.1109/ATC.2015.7388359","url":null,"abstract":"Tele-Radiology network is a network for remote radiology diagnosis. If Tele-Radiology can operate on the Internet, it will enhance imaging diagnostic of remote health clinics. Due to very large input data for Tele-Radiology network (CT 64 slice: 1500MB/case, MRI 1.5 Tesla: 600MB/case), it requires a load balancing mechanism to avoid traffic jam on the network. In order to deploy Tele-Radiology through the Internet without interfering Layer 1,2,3 of TCP/IP scheme, it requires a logical topology on the underlying physical TCP/IP. There isn't any research on applying de Bruijn graph as a logical topology for Tele-Radiology network yet. The MHC(d, k) (Logical network based on de Bruijn graph for Tele-Radiology) proposed in this article can be used for load balancing in Tele-Radiology and Tele-Medicine.","PeriodicalId":142783,"journal":{"name":"2015 International Conference on Advanced Technologies for Communications (ATC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128227655","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}
The broadcasting service of safety message has been introduced in vehicular ad-hoc networks (VANETs) as the service for safety application. The broadcast communication is considered as the most appropriate technique for distributing the safety message in VANETs because of the least of time needed by the medium access process and the proximity of the destination nodes. However, the broadcast service may have some disadvantages regarding to broadcast storm problem in dense area. In car collision condition, the emergency message from the collided cars should be propagated as fast as possible so the upcoming cars could avoid the pileup of cars accident by receiving the alert message from the front cars. In this paper, we discuss the behavior of conventional broadcast mechanism which blindly broadcast the emergency message to the neighboring nodes. We compare the conventional broadcast mechanism with one of intelligent broadcast mechanism called distance-based broadcast mechanism. From the simulation results, we observed that the penetration rate of the conventional broadcast mechanism gives a good result with only 20ms average propagation delay from the source to the last destination in 4.7Km road length which means the emergency message is well penetrated.
{"title":"A simulation study: Is the broadcast storming really harmful for emergency delivery in VANETs?","authors":"Irvanda Kurniadi Virdaus, Moonsoo Kang, Soekjoo Shin, Goo-Rak Kwon","doi":"10.1109/ATC.2015.7388415","DOIUrl":"https://doi.org/10.1109/ATC.2015.7388415","url":null,"abstract":"The broadcasting service of safety message has been introduced in vehicular ad-hoc networks (VANETs) as the service for safety application. The broadcast communication is considered as the most appropriate technique for distributing the safety message in VANETs because of the least of time needed by the medium access process and the proximity of the destination nodes. However, the broadcast service may have some disadvantages regarding to broadcast storm problem in dense area. In car collision condition, the emergency message from the collided cars should be propagated as fast as possible so the upcoming cars could avoid the pileup of cars accident by receiving the alert message from the front cars. In this paper, we discuss the behavior of conventional broadcast mechanism which blindly broadcast the emergency message to the neighboring nodes. We compare the conventional broadcast mechanism with one of intelligent broadcast mechanism called distance-based broadcast mechanism. From the simulation results, we observed that the penetration rate of the conventional broadcast mechanism gives a good result with only 20ms average propagation delay from the source to the last destination in 4.7Km road length which means the emergency message is well penetrated.","PeriodicalId":142783,"journal":{"name":"2015 International Conference on Advanced Technologies for Communications (ATC)","volume":"213 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133574957","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 : 2015-10-01DOI: 10.1109/ATC.2015.7388390
L. X. Truong, Nguyen Cong Tien, T. M. Tuan, T. Giang
In this paper, a new microstrip antenna is proposed for wireless applications on S and C bands. A log-periodic fractal Koch structure is selected to research. A new antenna is designed and simulated before optimizing. The results achieve the purpose of increasing the bandwidth and reducing the size of the antenna. The antenna also has high gain and is fabricated on the Duroid RO4700JXR substrate instead of FR4-epoxy as a lot of other designs.
{"title":"Design a log periodic fractal Koch microstrip antenna for S band and C band applications","authors":"L. X. Truong, Nguyen Cong Tien, T. M. Tuan, T. Giang","doi":"10.1109/ATC.2015.7388390","DOIUrl":"https://doi.org/10.1109/ATC.2015.7388390","url":null,"abstract":"In this paper, a new microstrip antenna is proposed for wireless applications on S and C bands. A log-periodic fractal Koch structure is selected to research. A new antenna is designed and simulated before optimizing. The results achieve the purpose of increasing the bandwidth and reducing the size of the antenna. The antenna also has high gain and is fabricated on the Duroid RO4700JXR substrate instead of FR4-epoxy as a lot of other designs.","PeriodicalId":142783,"journal":{"name":"2015 International Conference on Advanced Technologies for Communications (ATC)","volume":"356 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132897755","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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