Pub Date : 2015-03-04DOI: 10.1109/IWAT.2015.7365367
S. N. Boyko, A. Kukharenko, Yury S. Yaskin
An electronic band gap (EBG) metamaterial construction is presented and described. A construction of a multipath mitigating ground plane, based on the presented EBG metamaterial is described. A method of the ground plane application and installation, which provides the multipath mitigating without spoiling antenna element phase center stability, is described. A designed construction of GNSS antenna module, which contains a presented multipath mitigating ground plane, made from the presented EBG metamaterial and installed in the described way is shown and parameters of the antenna module are provided.
{"title":"EBG metamaterial ground plane application for GNSS antenna multipath mitigating","authors":"S. N. Boyko, A. Kukharenko, Yury S. Yaskin","doi":"10.1109/IWAT.2015.7365367","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365367","url":null,"abstract":"An electronic band gap (EBG) metamaterial construction is presented and described. A construction of a multipath mitigating ground plane, based on the presented EBG metamaterial is described. A method of the ground plane application and installation, which provides the multipath mitigating without spoiling antenna element phase center stability, is described. A designed construction of GNSS antenna module, which contains a presented multipath mitigating ground plane, made from the presented EBG metamaterial and installed in the described way is shown and parameters of the antenna module are provided.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126524430","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365383
J. Tak, Jaehoon Choi
In this paper, a reconfigurable single port triangular patch antenna with polarization diversity is proposed. The proposed antenna consists of a coaxially-fed corner-truncated equilateral triangular patch, two small parasitic triangular patches in the vicinity of truncated corners, two PIN diodes located between truncated corners of the patch and parasitic small patches as switch, two RF choke inductors, and dc bias line for practical design. The antenna has four different radiation modes depending on the diodes states (on and off): high-frequency linear polarization, low-frequency linear polarization, left-hand circular polarization, and right-hand circular polarization. The switchable antenna is designed to operate in 2.4 GHz ISM band for wireless communication applications such as wireless local area network and global positioning system.
{"title":"Reconfigurable single port triangular patch antenna with polarization diversity","authors":"J. Tak, Jaehoon Choi","doi":"10.1109/IWAT.2015.7365383","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365383","url":null,"abstract":"In this paper, a reconfigurable single port triangular patch antenna with polarization diversity is proposed. The proposed antenna consists of a coaxially-fed corner-truncated equilateral triangular patch, two small parasitic triangular patches in the vicinity of truncated corners, two PIN diodes located between truncated corners of the patch and parasitic small patches as switch, two RF choke inductors, and dc bias line for practical design. The antenna has four different radiation modes depending on the diodes states (on and off): high-frequency linear polarization, low-frequency linear polarization, left-hand circular polarization, and right-hand circular polarization. The switchable antenna is designed to operate in 2.4 GHz ISM band for wireless communication applications such as wireless local area network and global positioning system.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129715724","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365373
Jun-Ho Lee, Bomson Lee
A microwave absorber with a layer depth less than a quarter wavelength is investigated based on an equivalent circuit. For a specific absorber with a given layer electrical length, the equivalent resistance and capacitance of a capacitive screen can be determined using the presented closed-form design equations. The relation between the layer depth and absorption bandwidth is also analyzed. The presented formulation is validated by a design example in the ISM band. A unit of the absorber screen is realized using a resistive rectangular structure with surrounding gaps. The absorber is shown to offer a 90% absorption bandwidth from 2.3GHz to 5.1GHz (93%) with layer depth of 1/8 wavelength.
{"title":"Design of thin microwave absorbers using capacitive screen","authors":"Jun-Ho Lee, Bomson Lee","doi":"10.1109/IWAT.2015.7365373","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365373","url":null,"abstract":"A microwave absorber with a layer depth less than a quarter wavelength is investigated based on an equivalent circuit. For a specific absorber with a given layer electrical length, the equivalent resistance and capacitance of a capacitive screen can be determined using the presented closed-form design equations. The relation between the layer depth and absorption bandwidth is also analyzed. The presented formulation is validated by a design example in the ISM band. A unit of the absorber screen is realized using a resistive rectangular structure with surrounding gaps. The absorber is shown to offer a 90% absorption bandwidth from 2.3GHz to 5.1GHz (93%) with layer depth of 1/8 wavelength.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"83 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121325504","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365294
L. Batel, L. Rudant, J. Pintos, A. Clemente, C. Delaveaud, K. Mahdjoubi
Performance characteristics of passive electrically small antennas are limited by fundamental physics. Using active elements into antenna structures appears like an opportunity to overshoot those limits. Non-Foster elements are classically used in matching networks for electrically small antennas in order to increase their impedance matching bandwidth. In this paper, Non-Foster elements are proposed as innovative method to achieve a broadband high directive compact antenna at 868 MHz. The analysis is computed considering a three-element compact parasitic array. The impedance loads associated to each parasitic element have been calculated using an optimization procedure based on spherical wave expansion. Finally, the concept has been validated by electromagnetic simulations.
{"title":"High directive compact antenna with non-foster elements","authors":"L. Batel, L. Rudant, J. Pintos, A. Clemente, C. Delaveaud, K. Mahdjoubi","doi":"10.1109/IWAT.2015.7365294","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365294","url":null,"abstract":"Performance characteristics of passive electrically small antennas are limited by fundamental physics. Using active elements into antenna structures appears like an opportunity to overshoot those limits. Non-Foster elements are classically used in matching networks for electrically small antennas in order to increase their impedance matching bandwidth. In this paper, Non-Foster elements are proposed as innovative method to achieve a broadband high directive compact antenna at 868 MHz. The analysis is computed considering a three-element compact parasitic array. The impedance loads associated to each parasitic element have been calculated using an optimization procedure based on spherical wave expansion. Finally, the concept has been validated by electromagnetic simulations.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114760591","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365355
Raluca E. Topor, R. Tamas
This paper presents a new Ultra-Wide Band antenna system for direction finding applications. It consists of two orthogonal half-ring antennas with an unbalanced input. The antenna system was characterized by using energy-based descriptors, as pulsed excitations are considered. A new energy-based coupling parameter was defined in order to quantify the mutual coupling. The experimental results are close to the simulated data, both for frequency-domain and energy-based descriptors.
{"title":"A novel dual-padlock UWB antenna system","authors":"Raluca E. Topor, R. Tamas","doi":"10.1109/IWAT.2015.7365355","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365355","url":null,"abstract":"This paper presents a new Ultra-Wide Band antenna system for direction finding applications. It consists of two orthogonal half-ring antennas with an unbalanced input. The antenna system was characterized by using energy-based descriptors, as pulsed excitations are considered. A new energy-based coupling parameter was defined in order to quantify the mutual coupling. The experimental results are close to the simulated data, both for frequency-domain and energy-based descriptors.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125326129","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365265
G. Chattopadhyay
Millimeter- and submillimeter-wave imaging systems for astronomy, planetary, and Earth science applications are increasingly moving towards large focal plane arrays. The relatively long wavelengths together with focal ratios encountered imply mm-sized pixels, and when one considers arrays with a hundred to thousands of pixels, we have to deal with optical elements of quite substantial size. In many applications, geometry makes lenses far more attractive than mirrors, and since cryogenic detectors are invariably employed, ground-based systems as well as testing of space-based systems require vacuum windows 10s of cm in diameter. Especially at shorter wavelengths, very low loss materials are required since the thickness of lenses and windows is substantial, reaching several cm. Crystal quartz can be used in some cases, but available diameters are limited to 12 cm. The anisotropy of the material can be harmful in many situations as well.
{"title":"Terahertz antennas and related optical components","authors":"G. Chattopadhyay","doi":"10.1109/IWAT.2015.7365265","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365265","url":null,"abstract":"Millimeter- and submillimeter-wave imaging systems for astronomy, planetary, and Earth science applications are increasingly moving towards large focal plane arrays. The relatively long wavelengths together with focal ratios encountered imply mm-sized pixels, and when one considers arrays with a hundred to thousands of pixels, we have to deal with optical elements of quite substantial size. In many applications, geometry makes lenses far more attractive than mirrors, and since cryogenic detectors are invariably employed, ground-based systems as well as testing of space-based systems require vacuum windows 10s of cm in diameter. Especially at shorter wavelengths, very low loss materials are required since the thickness of lenses and windows is substantial, reaching several cm. Crystal quartz can be used in some cases, but available diameters are limited to 12 cm. The anisotropy of the material can be harmful in many situations as well.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122590726","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365283
Rupam Das, H. Yoo
Wireless power transfer (WPT) to medical implants allows clinicians to avoid using bulky energy storage components. In this paper, we address WPT systems for a pacemaker (PM). A resonant inductive coupling method was employed in the WPT system by introducing a spiral transmitter (Tx) coil and a spiral receiver (Rx) coil. Here, we introduced the concept of the Yagi-Uda antenna by using metamaterials (MTMs) in order to increase WPT efficiency in the Medical Implanted Communication Service (MICS). Based on the simulation results in a realistic model of the human body, we were able to design a compact and efficient WPT system for PMs. Moreover, our simulation results showed that the Yagi-Uda antenna configuration can significantly increase WPT efficiency.
{"title":"Wireless power transfer to a pacemaker by using metamaterials and Yagi-Uda antenna concept","authors":"Rupam Das, H. Yoo","doi":"10.1109/IWAT.2015.7365283","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365283","url":null,"abstract":"Wireless power transfer (WPT) to medical implants allows clinicians to avoid using bulky energy storage components. In this paper, we address WPT systems for a pacemaker (PM). A resonant inductive coupling method was employed in the WPT system by introducing a spiral transmitter (Tx) coil and a spiral receiver (Rx) coil. Here, we introduced the concept of the Yagi-Uda antenna by using metamaterials (MTMs) in order to increase WPT efficiency in the Medical Implanted Communication Service (MICS). Based on the simulation results in a realistic model of the human body, we were able to design a compact and efficient WPT system for PMs. Moreover, our simulation results showed that the Yagi-Uda antenna configuration can significantly increase WPT efficiency.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125056504","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365382
J. Yoon, Y. Yoon, Hyungrak Kim, W. Lee, J. So
The radiation characteristics of a reflectarray antenna with element type combination is analyzed using reflection phase errors. The reflectarray is designed with the combination of three element types: square patch (SP), square ring (SR), and ring-loaded patch (RLP). The reflection phase error of the reflectarray is compared with those of two reflectarrays using single element types (SP and RLP, respectively). Compared to the reflectarrays with only SP elements or RLP elements, it is shown that the reflection phase errors are reduced with the combination of the element types at the target frequency, and thus improved radiation performances are achieved.
{"title":"Reflection phase error analysis of microstrip reflectarrays","authors":"J. Yoon, Y. Yoon, Hyungrak Kim, W. Lee, J. So","doi":"10.1109/IWAT.2015.7365382","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365382","url":null,"abstract":"The radiation characteristics of a reflectarray antenna with element type combination is analyzed using reflection phase errors. The reflectarray is designed with the combination of three element types: square patch (SP), square ring (SR), and ring-loaded patch (RLP). The reflection phase error of the reflectarray is compared with those of two reflectarrays using single element types (SP and RLP, respectively). Compared to the reflectarrays with only SP elements or RLP elements, it is shown that the reflection phase errors are reduced with the combination of the element types at the target frequency, and thus improved radiation performances are achieved.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129132038","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365317
J. Hirokawa, Naoya Oikawa, Y. Hirachi, K. Okada, M. Ando
In this paper, we have discussed two topics. One is the connection of a quadrature oscillator chip with a 2×2 circularly-polarized patch array on this thick resin of a 60GHz band silicon chip through coaxial-line structures with hole opening. The other is the differential feed of a patch antenna, which will be suitable for the connection with a silicon CMOS chip.
{"title":"Quadrature oscillator connection and differential feed of a patch antenna on the thick resin in a 60GHz band silicon chip","authors":"J. Hirokawa, Naoya Oikawa, Y. Hirachi, K. Okada, M. Ando","doi":"10.1109/IWAT.2015.7365317","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365317","url":null,"abstract":"In this paper, we have discussed two topics. One is the connection of a quadrature oscillator chip with a 2×2 circularly-polarized patch array on this thick resin of a 60GHz band silicon chip through coaxial-line structures with hole opening. The other is the differential feed of a patch antenna, which will be suitable for the connection with a silicon CMOS chip.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129549399","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365377
Y. Kushiyama, T. Arima, T. Uno
A composite right/left-handed (CRLH) leaky wave antenna using a stepped impedance resonator (SIR) is presented. By applying the SIR technique to a conventional CRLH structure, a balanced condition is achieved through adjustments of parameters of the SIR. Therefore, the structure requires no interdigital or multilayer capacitor to achieve a balanced condition. A differential microstrip geometry is also used for utilizing a virtual ground to remove grounded vias. The simplicity of the structure allows applications at higher frequencies. A leaky wave antenna consists of 14 unit cells of the proposed structure is designed. A continuous beam scanning capability from backward to forward direction is confirmed.
{"title":"A microstrip composite right/left handed leaky-wave antenna using a stepped impedance resonator","authors":"Y. Kushiyama, T. Arima, T. Uno","doi":"10.1109/IWAT.2015.7365377","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365377","url":null,"abstract":"A composite right/left-handed (CRLH) leaky wave antenna using a stepped impedance resonator (SIR) is presented. By applying the SIR technique to a conventional CRLH structure, a balanced condition is achieved through adjustments of parameters of the SIR. Therefore, the structure requires no interdigital or multilayer capacitor to achieve a balanced condition. A differential microstrip geometry is also used for utilizing a virtual ground to remove grounded vias. The simplicity of the structure allows applications at higher frequencies. A leaky wave antenna consists of 14 unit cells of the proposed structure is designed. A continuous beam scanning capability from backward to forward direction is confirmed.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"296 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122087851","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：