Pub Date : 2018-03-01DOI: 10.1109/IWAT.2018.8379195
Zhengyu Huang, Zheng Sun, Ying-hui Zhou
In this paper, a perfectly matched layer (PML) absorbing boundary condition are implemented for the unconditionally stable Associated Hermite (AH) FDTD method. This leads to a high flexibility to analyze electromagnetic scattering problems, in terms of using a more efficient absorbing boundary condition to truncate computational domain. A numerical example of scattering from a 2-D rectangular loss dielectric medium is presented to validate the efficiency and accuracy.
{"title":"Perfectly matched layer absorbing boundary conditions for AH FDTD method","authors":"Zhengyu Huang, Zheng Sun, Ying-hui Zhou","doi":"10.1109/IWAT.2018.8379195","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379195","url":null,"abstract":"In this paper, a perfectly matched layer (PML) absorbing boundary condition are implemented for the unconditionally stable Associated Hermite (AH) FDTD method. This leads to a high flexibility to analyze electromagnetic scattering problems, in terms of using a more efficient absorbing boundary condition to truncate computational domain. A numerical example of scattering from a 2-D rectangular loss dielectric medium is presented to validate the efficiency and accuracy.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114221461","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 : 2018-03-01DOI: 10.1109/IWAT.2018.8379237
M. R. Effendi, Rudi Ernanto, A. Munir
This paper presents the development of 4.2GHz compact collinear antenna for manpack satellite communication. The antenna is expected to be an alternative replacement for manpack communication with satellite which typically uses a type of antenna with small parabolic reflector. The proposed antenna is constructed of 10 radiator stubs and its parameters are investigated to achieve the optimum design including resonant frequency, working bandwidth, gain and radiation pattern. Post fabrication process, the characteristics of realized collinear antenna are measured experimentally to be compared with the design results. It is demonstrated that the propagation characteristics of realized collinear antenna are coincided qualitatively with the simulated ones. The result shows that the realized collinear antenna has the measured gain of 4.62dBi comparable to the simulated result of 4.39dBi.
{"title":"4.2GHz compact collinear antenna for manpack satellite communication","authors":"M. R. Effendi, Rudi Ernanto, A. Munir","doi":"10.1109/IWAT.2018.8379237","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379237","url":null,"abstract":"This paper presents the development of 4.2GHz compact collinear antenna for manpack satellite communication. The antenna is expected to be an alternative replacement for manpack communication with satellite which typically uses a type of antenna with small parabolic reflector. The proposed antenna is constructed of 10 radiator stubs and its parameters are investigated to achieve the optimum design including resonant frequency, working bandwidth, gain and radiation pattern. Post fabrication process, the characteristics of realized collinear antenna are measured experimentally to be compared with the design results. It is demonstrated that the propagation characteristics of realized collinear antenna are coincided qualitatively with the simulated ones. The result shows that the realized collinear antenna has the measured gain of 4.62dBi comparable to the simulated result of 4.39dBi.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"os-14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127761987","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 : 2018-03-01DOI: 10.1109/IWAT.2018.8379200
Chao Huang, Y. Jiao, Z. Weng, Xin Li
A planar multiband antenna based on composite right-and-left-handed transmission line (CRLH-TL) zeroth-order resonator (ZOR) for 4G compact mobile terminals is proposed in this letter. The proposed antenna consists of a monopole, a CRLH-TL structure and a triangular radiation patch. Among them, the monopole antenna can cover GSM850/950 (824–960 MHz) and LTE2500 (2500–2690 MHz); capacitive excitation of the CRLH-TL structure can produce ZOR mode to cover LTE band 12 (698–746 MHz); triangular radiation patch can cover high-frequency DCS, PCS, UMTS, LTE2300 (1710–2490 MHz). Since the antenna has the advantage of multiband, compact size and ease to fabricate, it can be applied to design 4G compact mobile terminals.
{"title":"A planar multiband antenna based on CRLH-TL ZOR for 4G compact mobile terminal applications","authors":"Chao Huang, Y. Jiao, Z. Weng, Xin Li","doi":"10.1109/IWAT.2018.8379200","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379200","url":null,"abstract":"A planar multiband antenna based on composite right-and-left-handed transmission line (CRLH-TL) zeroth-order resonator (ZOR) for 4G compact mobile terminals is proposed in this letter. The proposed antenna consists of a monopole, a CRLH-TL structure and a triangular radiation patch. Among them, the monopole antenna can cover GSM850/950 (824–960 MHz) and LTE2500 (2500–2690 MHz); capacitive excitation of the CRLH-TL structure can produce ZOR mode to cover LTE band 12 (698–746 MHz); triangular radiation patch can cover high-frequency DCS, PCS, UMTS, LTE2300 (1710–2490 MHz). Since the antenna has the advantage of multiband, compact size and ease to fabricate, it can be applied to design 4G compact mobile terminals.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128112459","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 : 2018-03-01DOI: 10.1109/IWAT.2018.8379150
Lei Xing, Xingwei Meng, Luyinru Yang, Bei Xu, Yuying Pan
A wideband monopole water antenna with a circular top loading for WiFi applications is proposed. The proposed design combines different technologies such as the circular top loading, the salty water and the 3D printed holder as a transparent radiating element. A wide bandwidth is covered and a small size is achieved. The proposed antenna has a −6 dB S11 bandwidth from 1.5 GHz to 10 GHz with a high radiation efficiency from 43% to 70% in the WiFi frequency band from 2 GHz to 6 GHz. Simulations and measurements are conducted to quantify and validate the antenna performance. It is demonstrated that this design can be a good candidate for low cost and transparent WiFi applications.
{"title":"A wideband water antenna for WiFi applications","authors":"Lei Xing, Xingwei Meng, Luyinru Yang, Bei Xu, Yuying Pan","doi":"10.1109/IWAT.2018.8379150","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379150","url":null,"abstract":"A wideband monopole water antenna with a circular top loading for WiFi applications is proposed. The proposed design combines different technologies such as the circular top loading, the salty water and the 3D printed holder as a transparent radiating element. A wide bandwidth is covered and a small size is achieved. The proposed antenna has a −6 dB S11 bandwidth from 1.5 GHz to 10 GHz with a high radiation efficiency from 43% to 70% in the WiFi frequency band from 2 GHz to 6 GHz. Simulations and measurements are conducted to quantify and validate the antenna performance. It is demonstrated that this design can be a good candidate for low cost and transparent WiFi applications.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130055643","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 : 2018-03-01DOI: 10.1109/IWAT.2018.8379190
Jun-mo Wu, Dongfang Zhou, Xue Lei, Jun Gao, Hao-ming Hu
A high gain Fabry-Perot cavity antenna (FPCA) designed by modified ray tracking model(MRTM) is presented in this paper. In particular, the conventional ray tracking is modified in order to calculate the electric field distribution on the partially reflective surface(PRS). Furthermore, the dependence of the magnitude of PRS reflection coefficients on aperture efficiency is studied, which shows that an optimal magnitude exists on aperture efficiency for a fixed size FPCA. By using the optimized reflection coefficient, a final compact single layer FPCA with a dimension of 6.25λ0 × 6.25λ0 and a profile of 0.5λ0 is designed. The proposed antenna can reach a peak gain of 24.0dBi at 12.5GHz and an aperture efficiency of 51.2%.
{"title":"A high gain Fabry-Perot cavity antenna designed by modified ray tracking model","authors":"Jun-mo Wu, Dongfang Zhou, Xue Lei, Jun Gao, Hao-ming Hu","doi":"10.1109/IWAT.2018.8379190","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379190","url":null,"abstract":"A high gain Fabry-Perot cavity antenna (FPCA) designed by modified ray tracking model(MRTM) is presented in this paper. In particular, the conventional ray tracking is modified in order to calculate the electric field distribution on the partially reflective surface(PRS). Furthermore, the dependence of the magnitude of PRS reflection coefficients on aperture efficiency is studied, which shows that an optimal magnitude exists on aperture efficiency for a fixed size FPCA. By using the optimized reflection coefficient, a final compact single layer FPCA with a dimension of 6.25λ0 × 6.25λ0 and a profile of 0.5λ0 is designed. The proposed antenna can reach a peak gain of 24.0dBi at 12.5GHz and an aperture efficiency of 51.2%.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134015896","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 : 2018-03-01DOI: 10.1109/IWAT.2018.8379141
Xuxiang Chen, Y. Ge, Lv-wei Chen
In this paper, a folded reflectarray antenna operating at Ka band is presented. A crossed-dipole element, which is able to provide a tuning phase range of more than 420° is used to construct the reflectarray. Simulations and experiments are conducted to validate the design. With the overall size of 210 mm × 210 mm × 45.5 mm, a peak gain of 27.3 dBi and a 3 dB-gain bandwidth of 27.7–31 GHz have been achieved in measurements. Sidelobe levels are less than −20.5 dB and −18.5 dB in the E and H planes, respectively.
本文介绍了一种工作在Ka波段的折叠反射天线。交叉偶极子元件能够提供超过420°的调谐相位范围，用于构造反射反射。通过仿真和实验验证了设计的正确性。在总体尺寸为210 mm × 210 mm × 45.5 mm的情况下，测量获得了27.3 dBi的峰值增益和27.7-31 GHz的3db增益带宽。E面和H面旁瓣电平分别小于- 20.5 dB和- 18.5 dB。
{"title":"A folded reflectarray antenna at Ka band","authors":"Xuxiang Chen, Y. Ge, Lv-wei Chen","doi":"10.1109/IWAT.2018.8379141","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379141","url":null,"abstract":"In this paper, a folded reflectarray antenna operating at Ka band is presented. A crossed-dipole element, which is able to provide a tuning phase range of more than 420° is used to construct the reflectarray. Simulations and experiments are conducted to validate the design. With the overall size of 210 mm × 210 mm × 45.5 mm, a peak gain of 27.3 dBi and a 3 dB-gain bandwidth of 27.7–31 GHz have been achieved in measurements. Sidelobe levels are less than −20.5 dB and −18.5 dB in the E and H planes, respectively.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132807650","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 : 2018-03-01DOI: 10.1109/IWAT.2018.8379157
Fan-Guang Meng, Ping Chen, R. Wu
Split-ring resonator (SRR) has a narrow absorption response to the incident waves. To broaden the absorption bandwidth, we designed a 3-D structure to place the SRRs of different sizes vertically as a pyramids so that they can resonance in different frequency. Further, we strengthen the absorption effect by loading resistors in the SRRs. The influences of the SRRs' size and coupling effects between SRRs are discussed. So designed low-frequency absorber features broadband absorption, lower profile and small size. The −10dB bandwidth cover frequency range of 1.8–3.7GHz at relative bandwidth 69%. At the highest working frequency of the absorption bandwidth, the electric thickness is less than 0.3 and side length of the unit cell less than 0.25.
{"title":"3-D broadband subwavelength absorber based on split-ring resonators","authors":"Fan-Guang Meng, Ping Chen, R. Wu","doi":"10.1109/IWAT.2018.8379157","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379157","url":null,"abstract":"Split-ring resonator (SRR) has a narrow absorption response to the incident waves. To broaden the absorption bandwidth, we designed a 3-D structure to place the SRRs of different sizes vertically as a pyramids so that they can resonance in different frequency. Further, we strengthen the absorption effect by loading resistors in the SRRs. The influences of the SRRs' size and coupling effects between SRRs are discussed. So designed low-frequency absorber features broadband absorption, lower profile and small size. The −10dB bandwidth cover frequency range of 1.8–3.7GHz at relative bandwidth 69%. At the highest working frequency of the absorption bandwidth, the electric thickness is less than 0.3 and side length of the unit cell less than 0.25.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130798791","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 : 2018-03-01DOI: 10.1109/IWAT.2018.8379227
Jianing Zhao, Hao Li, Yihong Zhou, Xiaoguang Yang
This paper describes a novel single-layer Ka-band reflectarray antenna using log-periodic element. The proposed element composed of two log-periodic structures. By using the linear and smooth reflection phase curve, a reflectarray antenna with 324 elements is designed and simulated. The gain of the proposed antenna is 26.4 dB and the 1-dB gain bandwidth is 10.53%, which is a good candidate for the broadband situation.
{"title":"A novel single-layer Ka-band reflectarray antenna","authors":"Jianing Zhao, Hao Li, Yihong Zhou, Xiaoguang Yang","doi":"10.1109/IWAT.2018.8379227","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379227","url":null,"abstract":"This paper describes a novel single-layer Ka-band reflectarray antenna using log-periodic element. The proposed element composed of two log-periodic structures. By using the linear and smooth reflection phase curve, a reflectarray antenna with 324 elements is designed and simulated. The gain of the proposed antenna is 26.4 dB and the 1-dB gain bandwidth is 10.53%, which is a good candidate for the broadband situation.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"17 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133203734","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 : 2018-03-01DOI: 10.1109/IWAT.2018.8379124
Keisuke Fujita
The effective Q factor for self-resonant spherical surface antennas has been calculated in this study. A current sheet is assumed on the spherical surface and its radiated field is described in terms of the lowest TE and TM modes of the spherical wave expansion. Using the formula for stored energy of spherical mode, loss less Q factor is obtained. The effective Q factor is computed by multiplying the loss less Q factor and the radiation efficiency. The result is compared with non-resonant single mode case and with Chu limit.
{"title":"Effective Q factor for spherical surface antennas","authors":"Keisuke Fujita","doi":"10.1109/IWAT.2018.8379124","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379124","url":null,"abstract":"The effective Q factor for self-resonant spherical surface antennas has been calculated in this study. A current sheet is assumed on the spherical surface and its radiated field is described in terms of the lowest TE and TM modes of the spherical wave expansion. Using the formula for stored energy of spherical mode, loss less Q factor is obtained. The effective Q factor is computed by multiplying the loss less Q factor and the radiation efficiency. The result is compared with non-resonant single mode case and with Chu limit.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128913652","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 : 2018-03-01DOI: 10.1109/IWAT.2018.8379176
Xiaokang Bai, M. Su, Yuan’an Liu, Shulan Li
A broadband omnidirectional low-profile antenna with dual polarization for 4G MIMO indoor applications is presented. The dual polarized antenna is a combination of a low-profile monocone antenna for vertical polarization (VP) and a broadband dipoles array for horizontal polarization (HP). The low-profile monocone antenna achieves an impedance bandwidth of 103% from 0.87 GHz to 2.75 GHz, covering the GSM900/1800/1900/UMTS and LTE2300/2500 bands. The broadband dipole array provides an impedance bandwidth of 57% from 1.59 GHz to 2.87 GHz, including PCS, UMTS/LTE, Bluetooth, ISM, and WLAN bands. The isolation between the two antennas is greater than 38 dB in the whole bands. The profile of the proposed antenna is 78.6mm.
{"title":"Omnidirectional dual polarized low-profile antenna for 4G MIMO indoor applications","authors":"Xiaokang Bai, M. Su, Yuan’an Liu, Shulan Li","doi":"10.1109/IWAT.2018.8379176","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379176","url":null,"abstract":"A broadband omnidirectional low-profile antenna with dual polarization for 4G MIMO indoor applications is presented. The dual polarized antenna is a combination of a low-profile monocone antenna for vertical polarization (VP) and a broadband dipoles array for horizontal polarization (HP). The low-profile monocone antenna achieves an impedance bandwidth of 103% from 0.87 GHz to 2.75 GHz, covering the GSM900/1800/1900/UMTS and LTE2300/2500 bands. The broadband dipole array provides an impedance bandwidth of 57% from 1.59 GHz to 2.87 GHz, including PCS, UMTS/LTE, Bluetooth, ISM, and WLAN bands. The isolation between the two antennas is greater than 38 dB in the whole bands. The profile of the proposed antenna is 78.6mm.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114861570","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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