Pub Date : 2017-10-01DOI: 10.1109/APCAP.2017.8420737
Kang Liu, Yongqiang Cheng, Yuliang Qin, Xiang Li, Yanwen Jiang
The features of the vortex electromagnetic (EM) wave carrying orbital angular momentum (OAM) are studied, in this paper. The vortex fields for different polarizations are derived and the distribution of the electric field vector is presented. Subsequently, the propagation characteristics of vortex EM waves are analyzed. How the OAM mode varies with the propagation distance is depicted and the OAM-based radar range equation is defined accordingly. This theoretical analysis can be applied to wireless communications as well as target detection.
{"title":"Study on the unusual features of OAM beams and vortex electromagnetic fields","authors":"Kang Liu, Yongqiang Cheng, Yuliang Qin, Xiang Li, Yanwen Jiang","doi":"10.1109/APCAP.2017.8420737","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420737","url":null,"abstract":"The features of the vortex electromagnetic (EM) wave carrying orbital angular momentum (OAM) are studied, in this paper. The vortex fields for different polarizations are derived and the distribution of the electric field vector is presented. Subsequently, the propagation characteristics of vortex EM waves are analyzed. How the OAM mode varies with the propagation distance is depicted and the OAM-based radar range equation is defined accordingly. This theoretical analysis can be applied to wireless communications as well as target detection.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128134508","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}
UHF non-cooperative radar has special advantages in anti-stealth and anti-radiation missiles. However, the target detection of low angle is heavily affected by multipath effect in UHF band, especially when radars work in non-cooperative mode. The multipath signal, reflected by the ground or sea surface, is highly correlated with the direct signal, and they always fall within the same beamwidth. Antenna pattern is usually be split by multipath interference in low angle target detection, which seriously impact the detection performance and even cause large blind area of UHF non-cooperative radar coverage. In this paper, we propose a target detection method with multi-station fusion for UHF non-cooperative radar in multipath. A detailed model of multipath propagation in target detection using non-cooperative radar is established, and the validity and veracity of the proposed method is verified with theoretical derivation and modeling simulation.
{"title":"Low angle target detection method for UHF non-cooperative radar in multipath","authors":"Panhe Hu, Pengjiang Hu, Qinglong Bao, Zengping Chen","doi":"10.1109/APCAP.2017.8420892","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420892","url":null,"abstract":"UHF non-cooperative radar has special advantages in anti-stealth and anti-radiation missiles. However, the target detection of low angle is heavily affected by multipath effect in UHF band, especially when radars work in non-cooperative mode. The multipath signal, reflected by the ground or sea surface, is highly correlated with the direct signal, and they always fall within the same beamwidth. Antenna pattern is usually be split by multipath interference in low angle target detection, which seriously impact the detection performance and even cause large blind area of UHF non-cooperative radar coverage. In this paper, we propose a target detection method with multi-station fusion for UHF non-cooperative radar in multipath. A detailed model of multipath propagation in target detection using non-cooperative radar is established, and the validity and veracity of the proposed method is verified with theoretical derivation and modeling simulation.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125744087","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 : 2017-10-01DOI: 10.1109/APCAP.2017.8420677
S. Zheng, Y. Zheng
This paper proposes an approach to implement a bandpass filtering quadrature coupler. Motivated by the excellent properties of dielectric resonators (DRs), four cylindrical dielectric resonators operating at HE11 mode are utilized to implement a quadrature coupler with additional bandpass filtering function integrated. The coupling coefficient can be easily controlled by the cross irises between the DRs. For demonstration purposes, a quadrature coupler was designed to exhibit the 6 dB coupling coefficient together with bandpass filtering characteristics over an operating frequency of 5.2 GHz.
{"title":"Bandpass filtering coupler based on dual-mode dielectric resonators","authors":"S. Zheng, Y. Zheng","doi":"10.1109/APCAP.2017.8420677","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420677","url":null,"abstract":"This paper proposes an approach to implement a bandpass filtering quadrature coupler. Motivated by the excellent properties of dielectric resonators (DRs), four cylindrical dielectric resonators operating at HE11 mode are utilized to implement a quadrature coupler with additional bandpass filtering function integrated. The coupling coefficient can be easily controlled by the cross irises between the DRs. For demonstration purposes, a quadrature coupler was designed to exhibit the 6 dB coupling coefficient together with bandpass filtering characteristics over an operating frequency of 5.2 GHz.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121719257","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 : 2017-10-01DOI: 10.1109/APCAP.2017.8420372
Yi Huang, Chaoyun Song, S. Yuan, Jiafeng Zhou, Paul Carter
In this paper, wireless energy harvesting from Hz to GHz is discussed. At lower frequencies, the focus is on harvesting energy around 50 Hz power lines while at higher frequencies, the attention is paid to harvesting the energy from radio communication systems such as WiFi and mobile radio in the frequency range from 470 MHz to about 3 GHz. The main technology for both the lower and higher frequencies is the same: to use rectennas to receive the wireless energy and then covert it to DC energy. But the frequency difference has resulted in very different antenna designs and the bandwidth requirements. Some novel ideas have been introduced and discussed. At lower frequencies, a narrow band system is developed while at higher frequencies, a broadband system is produced in order to maximize the harvested energy. The designs are optimized to obtain the maximum energy conversion efficiency and then validated by experiments. The results demonstrate the excellence of these designs which can be applied for a wide range of applications.
{"title":"Wireless energy harvesting from Hz to GHz","authors":"Yi Huang, Chaoyun Song, S. Yuan, Jiafeng Zhou, Paul Carter","doi":"10.1109/APCAP.2017.8420372","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420372","url":null,"abstract":"In this paper, wireless energy harvesting from Hz to GHz is discussed. At lower frequencies, the focus is on harvesting energy around 50 Hz power lines while at higher frequencies, the attention is paid to harvesting the energy from radio communication systems such as WiFi and mobile radio in the frequency range from 470 MHz to about 3 GHz. The main technology for both the lower and higher frequencies is the same: to use rectennas to receive the wireless energy and then covert it to DC energy. But the frequency difference has resulted in very different antenna designs and the bandwidth requirements. Some novel ideas have been introduced and discussed. At lower frequencies, a narrow band system is developed while at higher frequencies, a broadband system is produced in order to maximize the harvested energy. The designs are optimized to obtain the maximum energy conversion efficiency and then validated by experiments. The results demonstrate the excellence of these designs which can be applied for a wide range of applications.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115809443","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 : 2017-10-01DOI: 10.1109/APCAP.2017.8420926
Guang-Yu Zhu, Houxing Zhou, Yi-Zhi Li, W. Hong
A method of constructing preconditioners for the IEODDM is proposed, and it needs a two-level decomposition, in which level-1 subdomain corresponds to the basic IE-ODDM subdomain, and level-2 subdomain is used to build preconditioners for Krylov subspace solver for each level-1 extended region. Numerical results show that the number of Krylov subspace iterations for a subdomain solution is greatly reduced compared with the previous IE-ODDM.
{"title":"A method of constructing preconditioned for IE-ODDM","authors":"Guang-Yu Zhu, Houxing Zhou, Yi-Zhi Li, W. Hong","doi":"10.1109/APCAP.2017.8420926","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420926","url":null,"abstract":"A method of constructing preconditioners for the IEODDM is proposed, and it needs a two-level decomposition, in which level-1 subdomain corresponds to the basic IE-ODDM subdomain, and level-2 subdomain is used to build preconditioners for Krylov subspace solver for each level-1 extended region. Numerical results show that the number of Krylov subspace iterations for a subdomain solution is greatly reduced compared with the previous IE-ODDM.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132470759","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 : 2017-10-01DOI: 10.1109/APCAP.2017.8420742
Yang Hongjuan, W. Lili, Pu Yurong, Xi Xiaoli
This paper aims to analyze the underlying relationships between the weather variations in a day and the propagation delay of the long-wave ground wave. First, we measured the propagation delay of the long-wave ground wave from Pucheng transmitting station to Xi'an receiving station, and found that the diurnal variation of the propagation delay is mainly related to the temperature variation in a day. What's more, we were surprised to note that there is a strong correlation between the diurnal variation of the propagation delay and the rainfall, specifically, the delay will drop sharply when it rains.
{"title":"Analysis of diurnal variation on long-wave ground wave propagation delay","authors":"Yang Hongjuan, W. Lili, Pu Yurong, Xi Xiaoli","doi":"10.1109/APCAP.2017.8420742","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420742","url":null,"abstract":"This paper aims to analyze the underlying relationships between the weather variations in a day and the propagation delay of the long-wave ground wave. First, we measured the propagation delay of the long-wave ground wave from Pucheng transmitting station to Xi'an receiving station, and found that the diurnal variation of the propagation delay is mainly related to the temperature variation in a day. What's more, we were surprised to note that there is a strong correlation between the diurnal variation of the propagation delay and the rainfall, specifically, the delay will drop sharply when it rains.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130270077","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 novel method to generate orbital angular momentum (OAM) beams in the large frequency range by helical antenna. The proposed antenna is designed to operate from 8.9 to 11.4 GHz, while the structure is extremely simple and convenient for production. Details of the proposed antenna design and simulated results are presented and discussed.
{"title":"Generating wideband orbital angular momentum beams using helical antenna","authors":"Xiangyue Zhang, Jiayu Zheng, Shilie Zheng, Xianbin Yu, H. Chi, Xiaofeng Jin, Xianmin Zhang","doi":"10.1109/APCAP.2017.8420955","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420955","url":null,"abstract":"In this paper, we propose a novel method to generate orbital angular momentum (OAM) beams in the large frequency range by helical antenna. The proposed antenna is designed to operate from 8.9 to 11.4 GHz, while the structure is extremely simple and convenient for production. Details of the proposed antenna design and simulated results are presented and discussed.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134191377","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 : 2017-10-01DOI: 10.1109/APCAP.2017.8420848
P. Futter, L. Scialacqua, L. Foged, J. Soler
An approach is presented where antenna measurement is combined through model decomposition with electromagnetic simulation for system level vehicle analysis. A brief description of the measurement and simulation process is provided by means of a realistic example of a sharkfin antenna. Various aspects related to antenna placement and EMC coupling for the sharkfin antenna and vehicle model are investigated in detail, highlighting the benefits of this approach.
{"title":"Automotive antenna placement and EMC analysis combining measurement with simulation","authors":"P. Futter, L. Scialacqua, L. Foged, J. Soler","doi":"10.1109/APCAP.2017.8420848","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420848","url":null,"abstract":"An approach is presented where antenna measurement is combined through model decomposition with electromagnetic simulation for system level vehicle analysis. A brief description of the measurement and simulation process is provided by means of a realistic example of a sharkfin antenna. Various aspects related to antenna placement and EMC coupling for the sharkfin antenna and vehicle model are investigated in detail, highlighting the benefits of this approach.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"240 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131801098","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 : 2017-10-01DOI: 10.1109/APCAP.2017.8420447
Kuigen Cao, F. Xu, Ling Yang
A simple dual-band Fabry-Perot resonator (FPR) antenna is presented in this paper. The dual-band wave is excited by a rectangular patch and a single coaxial. The FPR antenna consists of a partially reflective surface (PRS) and metal ground plane. The PRS is formed by rhombus slot frequency selective surface (FSS) and square metal patch FSS. In addition, the upper surface of the metal ground plane is also the FSS of square metal patch. The profile of the prototype has reduced to nearly one-sixth of the working wavelength. The peak gains of this antenna in the band of 8.5GHz and 11.5GHz have reached 17.6dBi and 16.3dBi respectively and the reflection coefficients in both band are all less than −10dB.
{"title":"Low-profile dual-band fabry-perot resonator antenna","authors":"Kuigen Cao, F. Xu, Ling Yang","doi":"10.1109/APCAP.2017.8420447","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420447","url":null,"abstract":"A simple dual-band Fabry-Perot resonator (FPR) antenna is presented in this paper. The dual-band wave is excited by a rectangular patch and a single coaxial. The FPR antenna consists of a partially reflective surface (PRS) and metal ground plane. The PRS is formed by rhombus slot frequency selective surface (FSS) and square metal patch FSS. In addition, the upper surface of the metal ground plane is also the FSS of square metal patch. The profile of the prototype has reduced to nearly one-sixth of the working wavelength. The peak gains of this antenna in the band of 8.5GHz and 11.5GHz have reached 17.6dBi and 16.3dBi respectively and the reflection coefficients in both band are all less than −10dB.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127628275","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 : 2017-10-01DOI: 10.1109/APCAP.2017.8420727
Fei Wang, Liang Zhang, Xianliang Wu
An ultra-wideband (UWB) millimeter-wave (mm-Wave) dipole antenna array for fifth generation (5G) communications is presented in this paper. A linear phased array with eight elliptical bow-tie antenna elements, designed on a Rogers RT5880 substrate, has been used at the top side of the handheld devices PCB. The simulated results show that the antenna has the reflection coefficient (S11) less than −10 dB in the frequency range of 26.5 GHz to 40.2 GHz (more than 41.5% fractional bandwidth). The proposed phased array antenna has good gain and quasi-omnidirectional radiation beams at different scanning angles in the operation band.
{"title":"An UWB MM-wave phased array antenna for 5G handheld devices applications","authors":"Fei Wang, Liang Zhang, Xianliang Wu","doi":"10.1109/APCAP.2017.8420727","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420727","url":null,"abstract":"An ultra-wideband (UWB) millimeter-wave (mm-Wave) dipole antenna array for fifth generation (5G) communications is presented in this paper. A linear phased array with eight elliptical bow-tie antenna elements, designed on a Rogers RT5880 substrate, has been used at the top side of the handheld devices PCB. The simulated results show that the antenna has the reflection coefficient (S11) less than −10 dB in the frequency range of 26.5 GHz to 40.2 GHz (more than 41.5% fractional bandwidth). The proposed phased array antenna has good gain and quasi-omnidirectional radiation beams at different scanning angles in the operation band.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131006308","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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