Pub Date : 2013-08-01DOI: 10.1109/IWEM.2013.6888752
D. Chang
In recent years, wireless communications systems are popular not only for voice communication, but also for data communication. The performance of voice and data will be degraded during wave propagation. This is called propagation fading. The propagation fading will decrease the signal to noise ratio. For smaller signal to noise ratio, the performances of communication range, BER (bit error rate), and data throughput rate will also be degraded. In order to overcome these serious effects of propagation fading, various kinds of reconfigurable antennas are developed for SDR (software defined radio) communication systems. By reconfiguring the existing antenna hardware to change the performance of antenna, the antenna will be more powerful for the application in SDR communication system. The reconfigurable antennas are one of the important parts in SDR communication system. By minor adjusting the reconfigurable antenna, the communication range, lower BER, and higher data throughput rate can be highly improved.
{"title":"Keynote speaker 2: Reconfigurable antennas for software defined radio","authors":"D. Chang","doi":"10.1109/IWEM.2013.6888752","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888752","url":null,"abstract":"In recent years, wireless communications systems are popular not only for voice communication, but also for data communication. The performance of voice and data will be degraded during wave propagation. This is called propagation fading. The propagation fading will decrease the signal to noise ratio. For smaller signal to noise ratio, the performances of communication range, BER (bit error rate), and data throughput rate will also be degraded. In order to overcome these serious effects of propagation fading, various kinds of reconfigurable antennas are developed for SDR (software defined radio) communication systems. By reconfiguring the existing antenna hardware to change the performance of antenna, the antenna will be more powerful for the application in SDR communication system. The reconfigurable antennas are one of the important parts in SDR communication system. By minor adjusting the reconfigurable antenna, the communication range, lower BER, and higher data throughput rate can be highly improved.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"198 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126032801","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 : 2013-08-01DOI: 10.1109/IWEM.2013.6888802
Bo Li, Q. Xue
A novel polarization reconfigurable omni-directional antenna is proposed in this paper. By adopting a coaxial probe which acts as the monopole and printed spoke-like metal strips fabricated on two substrates which act as the loop, the omni-directional circularly polarized (CP) wave can be generated in the azimuthal plane. To make the antenna polarization reconfigurable, 48 PIN diodes are placed on the two substrates to alter the current direction of the loop. An additional DC bias network is used to bias the diodes. The polarization status can be switched between RHCP and LHCP. The measured -10 dB impedance bandwidth is 25% and 26% and the average axial ratio (AR) is 2.33 dB and 2.45 dB for RHCP and LHCP in the azimuthal plane.
{"title":"Polarization reconfigurable omni-directional antenna combining monopole and loop radiators","authors":"Bo Li, Q. Xue","doi":"10.1109/IWEM.2013.6888802","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888802","url":null,"abstract":"A novel polarization reconfigurable omni-directional antenna is proposed in this paper. By adopting a coaxial probe which acts as the monopole and printed spoke-like metal strips fabricated on two substrates which act as the loop, the omni-directional circularly polarized (CP) wave can be generated in the azimuthal plane. To make the antenna polarization reconfigurable, 48 PIN diodes are placed on the two substrates to alter the current direction of the loop. An additional DC bias network is used to bias the diodes. The polarization status can be switched between RHCP and LHCP. The measured -10 dB impedance bandwidth is 25% and 26% and the average axial ratio (AR) is 2.33 dB and 2.45 dB for RHCP and LHCP in the azimuthal plane.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121415529","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 : 2013-08-01DOI: 10.1109/IWEM.2013.6888758
Jia‐lin Li, Bing-Zhong Wang, D. Zhao, S. Ding
Time reversal of electromagnetic waves exhibits temporal and spatial focusing. This unique characteristic has found potential applications to information transmission and processing. This paper simply gives an overview on spatially super-resolution focusing of microwaves from the computational electromagnetic laboratory of the UESTC in recent years, primarily emphasizing on super-resolution focusing antenna element and array.
{"title":"Recent researches on electromagnetic time reversal in UESTC","authors":"Jia‐lin Li, Bing-Zhong Wang, D. Zhao, S. Ding","doi":"10.1109/IWEM.2013.6888758","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888758","url":null,"abstract":"Time reversal of electromagnetic waves exhibits temporal and spatial focusing. This unique characteristic has found potential applications to information transmission and processing. This paper simply gives an overview on spatially super-resolution focusing of microwaves from the computational electromagnetic laboratory of the UESTC in recent years, primarily emphasizing on super-resolution focusing antenna element and array.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122394523","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 : 2013-08-01DOI: 10.1109/IWEM.2013.6888801
Jun Xiang, Wei Wei. Tan
Efficient localization algorithm is a research focus in the field of wireless sensor network (WSN). Nowadays, DV-hop algorithm is one of the most important range-free localization algorithms. In this paper, we analyse the fundamental of DV-hop algorithm and propose a novel improved DV-hop algorithm based on iterative computation. By simulations, the results show the proposed algorithm gives better accuracy than the original programming localization.
{"title":"An improved DV-hop algorithm based on iterative computation for wireless sensor network localization","authors":"Jun Xiang, Wei Wei. Tan","doi":"10.1109/IWEM.2013.6888801","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888801","url":null,"abstract":"Efficient localization algorithm is a research focus in the field of wireless sensor network (WSN). Nowadays, DV-hop algorithm is one of the most important range-free localization algorithms. In this paper, we analyse the fundamental of DV-hop algorithm and propose a novel improved DV-hop algorithm based on iterative computation. By simulations, the results show the proposed algorithm gives better accuracy than the original programming localization.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126704794","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 : 2013-08-01DOI: 10.1109/IWEM.2013.6888768
Q. Xue, Haotian Zhu, L. Chiu
A three-layer dielectric waveguide is and its transition to microstrip line is proposed and investigated. The proposed waveguide consists of three layer, high dielectric constant layer at the top layer, low dielectric constant at the middle layer, and ground plane at the bottom layer. A simple and compact microstrip transition is proposed and integrated for measurement purpose. A 20mm long section of the proposed waveguide with two microstrip transitions were designed and tested. In the measurement, the total insertion loss is around 3.3dB. The total insertion loss of the proposed waveguide and two transitions is around 1.8dB, while the loss of the two sections of the microstrip line and the test fixture is around 1.5dB.
{"title":"Three-layer dielectric waveguide with microstrip transition","authors":"Q. Xue, Haotian Zhu, L. Chiu","doi":"10.1109/IWEM.2013.6888768","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888768","url":null,"abstract":"A three-layer dielectric waveguide is and its transition to microstrip line is proposed and investigated. The proposed waveguide consists of three layer, high dielectric constant layer at the top layer, low dielectric constant at the middle layer, and ground plane at the bottom layer. A simple and compact microstrip transition is proposed and integrated for measurement purpose. A 20mm long section of the proposed waveguide with two microstrip transitions were designed and tested. In the measurement, the total insertion loss is around 3.3dB. The total insertion loss of the proposed waveguide and two transitions is around 1.8dB, while the loss of the two sections of the microstrip line and the test fixture is around 1.5dB.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129931878","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}
In this paper, we propose a RFID reader pad using free access transmission line. Free access transmission line using microstrip bandpass filter has wideband transmission characteristic and stable coupling with the receiving antenna in fixed direction. To obtain a stable coupling in any antenna direction, we propose the diamond shaped transmission line and circularly polarized antenna. The proposed line and antenna are effective as two-dimensional RFID reader and tag.
{"title":"RFID reader pad using free access transmission line","authors":"T. Okura, H. Arai","doi":"10.1587/COMEX.2.205","DOIUrl":"https://doi.org/10.1587/COMEX.2.205","url":null,"abstract":"In this paper, we propose a RFID reader pad using free access transmission line. Free access transmission line using microstrip bandpass filter has wideband transmission characteristic and stable coupling with the receiving antenna in fixed direction. To obtain a stable coupling in any antenna direction, we propose the diamond shaped transmission line and circularly polarized antenna. The proposed line and antenna are effective as two-dimensional RFID reader and tag.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"330 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122138444","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 : 1900-01-01DOI: 10.1109/IWEM.2013.6888799
M. Rana, A. Mohan, K. Chung
In this paper, we present a two-step convolutional perfectly matched layer (CPML) absorbing boundary condition for implicit locally 1-D finite difference time domain (LOD-FDTD) method for analysing 3-D microwave structures. We also derive a modified two-step LOD-FDTD algorithm which we will denote as C-LOD-FDTD. A comparison with the standard FDTD demonstrates the advantages of the proposed C-LOD-FDTD CPML method in terms of lighter calculation burden and higher efficiency. Numerical results on 3-D microwave structures using the proposed method are also presented.
{"title":"An efficient two-step CPML for 3-D LOD-FDTD","authors":"M. Rana, A. Mohan, K. Chung","doi":"10.1109/IWEM.2013.6888799","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888799","url":null,"abstract":"In this paper, we present a two-step convolutional perfectly matched layer (CPML) absorbing boundary condition for implicit locally 1-D finite difference time domain (LOD-FDTD) method for analysing 3-D microwave structures. We also derive a modified two-step LOD-FDTD algorithm which we will denote as C-LOD-FDTD. A comparison with the standard FDTD demonstrates the advantages of the proposed C-LOD-FDTD CPML method in terms of lighter calculation burden and higher efficiency. Numerical results on 3-D microwave structures using the proposed method are also presented.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116232965","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 : 1900-01-01DOI: 10.1109/IWEM.2013.6888755
T. Fukusako, Naoya Noguchi, S. Yamaura
A combination of an L-shaped probe and square waveguide generates circular polarization. In this paper, the authors reports a generation by a L-shaped probe and a circular waveguide. Furthermore, a reduction of the higher-order TM mode limiting the bandwidth in axial ratio and impedance characteristics is discussed. Finally, validity as a CP-UWB antenna is also discussed.
{"title":"Bandwidth enhancement of circular polarization generated from circular waveguide and L-shaped probe","authors":"T. Fukusako, Naoya Noguchi, S. Yamaura","doi":"10.1109/IWEM.2013.6888755","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888755","url":null,"abstract":"A combination of an L-shaped probe and square waveguide generates circular polarization. In this paper, the authors reports a generation by a L-shaped probe and a circular waveguide. Furthermore, a reduction of the higher-order TM mode limiting the bandwidth in axial ratio and impedance characteristics is discussed. Finally, validity as a CP-UWB antenna is also discussed.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125385773","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 : 1900-01-01DOI: 10.1109/IWEM.2013.6888776
Y. Hori, Yuki Doi, H. Moriya, K. Ichige, H. Arai, H. Matsuno, Takahiro Hayashi, M. Nakano
In this paper, a novel pyramidal shaped antenna configuration for two-dimensional direction-of-arrival estimation is presented. The proposed antenna consists of four sub-arrays and a top antenna for phase reference, and uses four antenna elements in DOA estimation with 4-channel receiver. The performance of 2D-DOA estimation based on sub-arrays of the proposed antenna under LOS environment is demonstrated.
{"title":"2D-DOA estimation under LOS environment by using pyramid shaped array antenna","authors":"Y. Hori, Yuki Doi, H. Moriya, K. Ichige, H. Arai, H. Matsuno, Takahiro Hayashi, M. Nakano","doi":"10.1109/IWEM.2013.6888776","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888776","url":null,"abstract":"In this paper, a novel pyramidal shaped antenna configuration for two-dimensional direction-of-arrival estimation is presented. The proposed antenna consists of four sub-arrays and a top antenna for phase reference, and uses four antenna elements in DOA estimation with 4-channel receiver. The performance of 2D-DOA estimation based on sub-arrays of the proposed antenna under LOS environment is demonstrated.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121418479","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 : 1900-01-01DOI: 10.1109/IWEM.2013.6888793
Chi-Lin Tsai, Chiu-Yueh Huang, Chin-Lung Yang
This study proposes a compact dual-band antenna for MedRadio band (401 - 406 MHz). Chip inductors are applied in meandering monopole and spiral slot antennas to achieve a compact design. The simulated E-field of the monopole antenna increases significantly due to the inductive loads. The resonance modes of these two radiation components form 404 and 437 MHz. The dimension of the proposed antenna is 0.0269λ0 × 0.0269λ0 × 0.00108λ0 mm3. The antenna simulated gains at 404 MHz and 437 MHz are -27.6 dBi and -29 dBi, respectively.
{"title":"Compact dual-band antennas with inductive loads operating at MedRadio band","authors":"Chi-Lin Tsai, Chiu-Yueh Huang, Chin-Lung Yang","doi":"10.1109/IWEM.2013.6888793","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888793","url":null,"abstract":"This study proposes a compact dual-band antenna for MedRadio band (401 - 406 MHz). Chip inductors are applied in meandering monopole and spiral slot antennas to achieve a compact design. The simulated E-field of the monopole antenna increases significantly due to the inductive loads. The resonance modes of these two radiation components form 404 and 437 MHz. The dimension of the proposed antenna is 0.0269λ<sub>0</sub> × 0.0269λ<sub>0</sub> × 0.00108λ<sub>0</sub> mm<sup>3</sup>. The antenna simulated gains at 404 MHz and 437 MHz are -27.6 dBi and -29 dBi, respectively.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117266221","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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