Pub Date : 1900-01-01DOI: 10.1109/IWAT.2017.7915326
Amin Kianinejad, Zhi Ning Chen, C. Qiu
A leaky wave antenna is proposed and designed based on the spoof surface plasmon (SSP) modes with high radiation conversion within the entire operation bandwidth of 12–23 GHz. The conventional LWAs suffer from complexity of the design and low radiation at their higher edge frequencies. Here, a new method is proposed to design the LWAs using symmetric spoof surface plasmon structures. Operating at non-transmission frequency range, the SSP modes ensure the low transmitted power through the LWA and consequently do not require any loading termination. As a result, the design achieves the high radiation efficiency without any loading loss. Benefiting from a simple and single-layer configuration, the symmetric plasmonic LWA generates high efficient backward, broadside and forward radiation with consistent performance through the entire frequency range. The design is experimentally evaluated and demonstrates its performance as a frequency beam scanning antenna.
{"title":"Highly radiative symmetric plasmonic leaky wave antenna","authors":"Amin Kianinejad, Zhi Ning Chen, C. Qiu","doi":"10.1109/IWAT.2017.7915326","DOIUrl":"https://doi.org/10.1109/IWAT.2017.7915326","url":null,"abstract":"A leaky wave antenna is proposed and designed based on the spoof surface plasmon (SSP) modes with high radiation conversion within the entire operation bandwidth of 12–23 GHz. The conventional LWAs suffer from complexity of the design and low radiation at their higher edge frequencies. Here, a new method is proposed to design the LWAs using symmetric spoof surface plasmon structures. Operating at non-transmission frequency range, the SSP modes ensure the low transmitted power through the LWA and consequently do not require any loading termination. As a result, the design achieves the high radiation efficiency without any loading loss. Benefiting from a simple and single-layer configuration, the symmetric plasmonic LWA generates high efficient backward, broadside and forward radiation with consistent performance through the entire frequency range. The design is experimentally evaluated and demonstrates its performance as a frequency beam scanning antenna.","PeriodicalId":289886,"journal":{"name":"2017 International Workshop on Antenna Technology: Small Antennas, Innovative Structures, and Applications (iWAT)","volume":"1 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":"129977629","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/IWAT.2017.7915333
Long Zhang, S. Gao, Q. Luo, Wenting Li
This paper presents a novel circularly polarized (CP) printed antenna with wide bandwidth and wide axial ratio (AR) beamwidth. The presented antenna is realized by bending a linearly polarized dipole into “S” shape with variable line width, which achieves circularly polarized radiation. Key parameters in designing such an “S” antenna are discussed and studied. It is found that this “S” antenna has some similar features to the linear polarized dipole, such as the feeding method, the radiation pattern in some main planes and nearly omnidirectional radiation in one main plane. To verify its performance, a ground plane backed inverted-S antenna is fabricated and characterized. Measured results confirm that the proposed antenna has good CP radiation, wide CP beamwidth from 4 to 6 GHz. The antenna is promising for applications in Global Navigation Satellite Systems (GNSS), and wideband wide-angle-scanning CP phased arrays.
{"title":"Wideband circularly polarized wide-beamwidth antenna using S-shaped dipole","authors":"Long Zhang, S. Gao, Q. Luo, Wenting Li","doi":"10.1109/IWAT.2017.7915333","DOIUrl":"https://doi.org/10.1109/IWAT.2017.7915333","url":null,"abstract":"This paper presents a novel circularly polarized (CP) printed antenna with wide bandwidth and wide axial ratio (AR) beamwidth. The presented antenna is realized by bending a linearly polarized dipole into “S” shape with variable line width, which achieves circularly polarized radiation. Key parameters in designing such an “S” antenna are discussed and studied. It is found that this “S” antenna has some similar features to the linear polarized dipole, such as the feeding method, the radiation pattern in some main planes and nearly omnidirectional radiation in one main plane. To verify its performance, a ground plane backed inverted-S antenna is fabricated and characterized. Measured results confirm that the proposed antenna has good CP radiation, wide CP beamwidth from 4 to 6 GHz. The antenna is promising for applications in Global Navigation Satellite Systems (GNSS), and wideband wide-angle-scanning CP phased arrays.","PeriodicalId":289886,"journal":{"name":"2017 International Workshop on Antenna Technology: Small Antennas, Innovative Structures, and Applications (iWAT)","volume":"20 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":"134641636","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/IWAT.2017.7915366
Mohamed El Badawe, O. Ramahi
Metamaterial particles are essentially electrically-small radiators with polarization dependency. Previous works on metamaterials were concerned primarily with using such particles to achieve homogeneous media that enabled unconventional propagation. The metamaterial radiators are inefficient if used in isolation, however, if used as an ensemble, they, collectively, radiate efficiently. This suggests their use as antennas. Because of their electrically-small size, metamaterial elements can be considered as Huygens radiators. With this perspective, a systematic procedure for designing directional and efficient antennas can be developed as we demonstrate here. Furthermore, the new perspective and technology can provide conformable antennas for non-planar platforms.
{"title":"Towards a methodology for conformable antenna design","authors":"Mohamed El Badawe, O. Ramahi","doi":"10.1109/IWAT.2017.7915366","DOIUrl":"https://doi.org/10.1109/IWAT.2017.7915366","url":null,"abstract":"Metamaterial particles are essentially electrically-small radiators with polarization dependency. Previous works on metamaterials were concerned primarily with using such particles to achieve homogeneous media that enabled unconventional propagation. The metamaterial radiators are inefficient if used in isolation, however, if used as an ensemble, they, collectively, radiate efficiently. This suggests their use as antennas. Because of their electrically-small size, metamaterial elements can be considered as Huygens radiators. With this perspective, a systematic procedure for designing directional and efficient antennas can be developed as we demonstrate here. Furthermore, the new perspective and technology can provide conformable antennas for non-planar platforms.","PeriodicalId":289886,"journal":{"name":"2017 International Workshop on Antenna Technology: Small Antennas, Innovative Structures, and Applications (iWAT)","volume":"1 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":"130769000","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/IWAT.2017.7915331
D. Rongas, C. Kakoyiannis, G. Fikioris
The use of magnetodielectric reconfigurable antennas on smartphones was investigated aiming to meet the requirements of the lower bands of current 4G standards and beyond. Since physical dimensions are constrained by the size of the mobile terminal, a reconfigurability mechanism based on partial magnetodielectric substrates and superstrates was studied in order to shift the resonance frequency lower while maintaining low system complexity. A printed inverted-F antenna (PIFA) was used to demonstrate continuous tuning, as opposed to the discrete tuning states of other methods, e.g., aperture tuning by means of switched capacitors. The numerical analysis of the PIFA started with lossy, isotropic ferrites, and then it elevated to gyromagnetic anisotropy. It was found that some of the benefits of tunable magnetodielectric loading are the ability to cover the 600–960 MHz band with just 3–5 sub-bands requiring realistic values of permeability, whereas an adequate radiation efficiency is maintained throughout the band.
{"title":"Towards 600 MHz LTE smartphones via tunable magnetodielectric Printed Inverted-F Antennas","authors":"D. Rongas, C. Kakoyiannis, G. Fikioris","doi":"10.1109/IWAT.2017.7915331","DOIUrl":"https://doi.org/10.1109/IWAT.2017.7915331","url":null,"abstract":"The use of magnetodielectric reconfigurable antennas on smartphones was investigated aiming to meet the requirements of the lower bands of current 4G standards and beyond. Since physical dimensions are constrained by the size of the mobile terminal, a reconfigurability mechanism based on partial magnetodielectric substrates and superstrates was studied in order to shift the resonance frequency lower while maintaining low system complexity. A printed inverted-F antenna (PIFA) was used to demonstrate continuous tuning, as opposed to the discrete tuning states of other methods, e.g., aperture tuning by means of switched capacitors. The numerical analysis of the PIFA started with lossy, isotropic ferrites, and then it elevated to gyromagnetic anisotropy. It was found that some of the benefits of tunable magnetodielectric loading are the ability to cover the 600–960 MHz band with just 3–5 sub-bands requiring realistic values of permeability, whereas an adequate radiation efficiency is maintained throughout the band.","PeriodicalId":289886,"journal":{"name":"2017 International Workshop on Antenna Technology: Small Antennas, Innovative Structures, and Applications (iWAT)","volume":"64 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":"129541641","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/IWAT.2017.7915369
K. Saito, K. Ito, N. Ogasawara
In recent years, various types of medical applications of microwave antennas have widely been investigated. Typical recent applications include medical information transmission, diagnosis, and treatment. In this paper, microwave techniques for treatment, which employ thermal effect of electromagnetic wave, are introduced. They are thermal treatment of cancer called hyperthermia and surgical devices using high power microwave energy. Here, in order to evaluate characteristics of the devices, numerical calculation is introduced. In addition, experiences of animal experiment and clinical treatments using our developed antennas are also presented.
{"title":"Application of microwave energy to therapeutic devices","authors":"K. Saito, K. Ito, N. Ogasawara","doi":"10.1109/IWAT.2017.7915369","DOIUrl":"https://doi.org/10.1109/IWAT.2017.7915369","url":null,"abstract":"In recent years, various types of medical applications of microwave antennas have widely been investigated. Typical recent applications include medical information transmission, diagnosis, and treatment. In this paper, microwave techniques for treatment, which employ thermal effect of electromagnetic wave, are introduced. They are thermal treatment of cancer called hyperthermia and surgical devices using high power microwave energy. Here, in order to evaluate characteristics of the devices, numerical calculation is introduced. In addition, experiences of animal experiment and clinical treatments using our developed antennas are also presented.","PeriodicalId":289886,"journal":{"name":"2017 International Workshop on Antenna Technology: Small Antennas, Innovative Structures, and Applications (iWAT)","volume":"6 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":"131568728","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/IWAT.2017.7915379
Eleni A. Lekka, Konstantinos D. Paschaloudis, G. Kyriacou
The estimation of the proper amplitude and phase excitation of phased array applicator used for hyperthermia treatment constitutes the scope of this work. The aim of this array is to focus the electromagnetic power only on the malignant biological tissues and not to create other unwanted secondary “hot spots”. The proposed method is based on the reciprocity theorem in order to build the simulation model for the exact numerical calculation of the excitation values. Explicitly, a simplistic body model or Human arm is constructed including the antennas and the water bolus utilized for cooling. An antenna is placed at the tumor center acting as source and an electromagnetic simulation is performed to estimate the path delay (phase difference) to each array element. These delays or phase differences are used to define the array excitation currents, ensuring the focus of the electromagnetic power on the tumors.
{"title":"Phased array design for near field focused hyperthermia based on reciprocity theorem","authors":"Eleni A. Lekka, Konstantinos D. Paschaloudis, G. Kyriacou","doi":"10.1109/IWAT.2017.7915379","DOIUrl":"https://doi.org/10.1109/IWAT.2017.7915379","url":null,"abstract":"The estimation of the proper amplitude and phase excitation of phased array applicator used for hyperthermia treatment constitutes the scope of this work. The aim of this array is to focus the electromagnetic power only on the malignant biological tissues and not to create other unwanted secondary “hot spots”. The proposed method is based on the reciprocity theorem in order to build the simulation model for the exact numerical calculation of the excitation values. Explicitly, a simplistic body model or Human arm is constructed including the antennas and the water bolus utilized for cooling. An antenna is placed at the tumor center acting as source and an electromagnetic simulation is performed to estimate the path delay (phase difference) to each array element. These delays or phase differences are used to define the array excitation currents, ensuring the focus of the electromagnetic power on the tumors.","PeriodicalId":289886,"journal":{"name":"2017 International Workshop on Antenna Technology: Small Antennas, Innovative Structures, and Applications (iWAT)","volume":"99 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":"124935561","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/IWAT.2017.7915372
Han Zhou, Jun-ping Geng, R. Jin, Xianling Liang, Weiren Zhu, Liang Liu
In this paper, a novel low-profile circularly polarized crossed dipole antenna operating at UHF band, with small dimensions of 180 mm × 160 mm × 4 mm ( 0.22 λ × 0.20 λ × 0.005 λ) where λ is the wavelength corresponding to resonant frequency 370MHz, is proposed. Meandering lines are designed to reduce the size of the antenna. To achieve circularly polarized radiation pattern, a feeding network composed of a power divider and 90° phase shifter is used. Besides, the ground of the feeding network serves as a half-ground for the radiation part. Finally, the antenna is modeled as the optimized version. It has good simulated realized gain with radiation efficiency about 80% to 90% at resonant frequency.
本文提出了一种工作在UHF频段的新型低轮廓圆极化交叉偶极子天线，其尺寸为180 mm × 160 mm × 4 mm (0.22 λ × 0.20 λ × 0.005 λ)， λ为谐振频率370MHz对应的波长。弯曲的线条是为了减小天线的尺寸。为了实现圆极化辐射方向图，采用了由功率分配器和90°移相器组成的馈电网络。此外，馈电网络地作为辐射部分的半地。最后，对优化后的天线进行了建模。它具有良好的模拟实现增益，在谐振频率下辐射效率约为80% ~ 90%。
{"title":"A novel low-profile circularly polarized UHF crossed dipole antenna","authors":"Han Zhou, Jun-ping Geng, R. Jin, Xianling Liang, Weiren Zhu, Liang Liu","doi":"10.1109/IWAT.2017.7915372","DOIUrl":"https://doi.org/10.1109/IWAT.2017.7915372","url":null,"abstract":"In this paper, a novel low-profile circularly polarized crossed dipole antenna operating at UHF band, with small dimensions of 180 mm × 160 mm × 4 mm ( 0.22 λ × 0.20 λ × 0.005 λ) where λ is the wavelength corresponding to resonant frequency 370MHz, is proposed. Meandering lines are designed to reduce the size of the antenna. To achieve circularly polarized radiation pattern, a feeding network composed of a power divider and 90° phase shifter is used. Besides, the ground of the feeding network serves as a half-ground for the radiation part. Finally, the antenna is modeled as the optimized version. It has good simulated realized gain with radiation efficiency about 80% to 90% at resonant frequency.","PeriodicalId":289886,"journal":{"name":"2017 International Workshop on Antenna Technology: Small Antennas, Innovative Structures, and Applications (iWAT)","volume":"64 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":"114940683","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/IWAT.2017.7915344
K. Saito, R. Akiyama, T. Nagaoka, Soichi Watanabe
In recent years, electromagnetic interference (EMI) of an implanted cardiac pacemaker (PM) has been investigated. However, there are few studies of specific absorption rate (SAR) around the PM by the mobile radio terminal. In this paper, SAR due to a wireless radio terminal which has high resolution source model is calculated. As a result of calculations, SAR at 2 GHz was 4 times higher than that at 900 MHz because of reflection wave at PM housing. However, all calculated SARs were below the international safety guidelines.
{"title":"The numerical evaluations on SAR around an implanted cardiac pacemaker by a mobile phone of multiple operating frequencies","authors":"K. Saito, R. Akiyama, T. Nagaoka, Soichi Watanabe","doi":"10.1109/IWAT.2017.7915344","DOIUrl":"https://doi.org/10.1109/IWAT.2017.7915344","url":null,"abstract":"In recent years, electromagnetic interference (EMI) of an implanted cardiac pacemaker (PM) has been investigated. However, there are few studies of specific absorption rate (SAR) around the PM by the mobile radio terminal. In this paper, SAR due to a wireless radio terminal which has high resolution source model is calculated. As a result of calculations, SAR at 2 GHz was 4 times higher than that at 900 MHz because of reflection wave at PM housing. However, all calculated SARs were below the international safety guidelines.","PeriodicalId":289886,"journal":{"name":"2017 International Workshop on Antenna Technology: Small Antennas, Innovative Structures, and Applications (iWAT)","volume":"1 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":"130645164","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/IWAT.2017.7915354
P. Gkonis, A. Kapsalis, D. Kaklamani, I. Venieris, C. Zekios, M. Chryssomallis, G. Kyriacou
The goal of this paper is to investigate the performance of MIMO-WCDMA networks, where Principal Component Analysis (PCA) is employed at the reception. Multipath propagation is exploited, as the individual received signals can be seen as different instances of the same physical phenomenon (i.e. transmission and reception of WCDMA sequences). In this context, the received data are first transformed using an orthogonal representation. Afterwards, the constructed covariance matrix is used in order to reduce the overall complexity of a proposed transmission strategy for signal transmission in MIMO-WCDMA networks in diversity combining transmission mode. As results indicate, for a 2×2 MIMO orientation (i.e. two transmit and receive antennas) and six multipath components, the complexity of the proposed algorithm can be reduced up to 15%/60% for SNR equal to 0/5 dB, respectively.
{"title":"Reducing transmission complexity in MIMO-WCDMA networks employing Principal Component Analysis","authors":"P. Gkonis, A. Kapsalis, D. Kaklamani, I. Venieris, C. Zekios, M. Chryssomallis, G. Kyriacou","doi":"10.1109/IWAT.2017.7915354","DOIUrl":"https://doi.org/10.1109/IWAT.2017.7915354","url":null,"abstract":"The goal of this paper is to investigate the performance of MIMO-WCDMA networks, where Principal Component Analysis (PCA) is employed at the reception. Multipath propagation is exploited, as the individual received signals can be seen as different instances of the same physical phenomenon (i.e. transmission and reception of WCDMA sequences). In this context, the received data are first transformed using an orthogonal representation. Afterwards, the constructed covariance matrix is used in order to reduce the overall complexity of a proposed transmission strategy for signal transmission in MIMO-WCDMA networks in diversity combining transmission mode. As results indicate, for a 2×2 MIMO orientation (i.e. two transmit and receive antennas) and six multipath components, the complexity of the proposed algorithm can be reduced up to 15%/60% for SNR equal to 0/5 dB, respectively.","PeriodicalId":289886,"journal":{"name":"2017 International Workshop on Antenna Technology: Small Antennas, Innovative Structures, and Applications (iWAT)","volume":"74 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":"121187310","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/IWAT.2017.7915320
Syed Imran Hussain Shah, Sungjoon Lim, M. Tentzeris
In this paper, origami antennas are proposed for military field deployment. A high gain tetrahedron origami antenna (antenna #1) is introduced and then extended to circularly polarized antenna (antenna #2) for military satellite applications. Both the antennas are realized on paper substrate by using origami tetrahedron structure. The radiating aperture of antenna #1 comprises a triangular shaped monopole and two strip directors. The fabricated antenna #1 demonstrates a peak gain of 9.6dBi at 2.6 GHz with impedance bandwidth of 66% (2–4 GHz). The circular polarization characteristics of antenna #2 is achieved by exciting two identical triangular shaped monopole elements. Both the elements are fed by a T-junction divider with a phase difference of 90°. The 3-dB axial-ratio bandwidth and impedance bandwidth of the proposed antenna #2 are found to be 8% (3.415 to 3.7 GHz), and 70.2% (2.4 to 5 GHz), respectively.
{"title":"Military field deployable antenna using origami","authors":"Syed Imran Hussain Shah, Sungjoon Lim, M. Tentzeris","doi":"10.1109/IWAT.2017.7915320","DOIUrl":"https://doi.org/10.1109/IWAT.2017.7915320","url":null,"abstract":"In this paper, origami antennas are proposed for military field deployment. A high gain tetrahedron origami antenna (antenna #1) is introduced and then extended to circularly polarized antenna (antenna #2) for military satellite applications. Both the antennas are realized on paper substrate by using origami tetrahedron structure. The radiating aperture of antenna #1 comprises a triangular shaped monopole and two strip directors. The fabricated antenna #1 demonstrates a peak gain of 9.6dBi at 2.6 GHz with impedance bandwidth of 66% (2–4 GHz). The circular polarization characteristics of antenna #2 is achieved by exciting two identical triangular shaped monopole elements. Both the elements are fed by a T-junction divider with a phase difference of 90°. The 3-dB axial-ratio bandwidth and impedance bandwidth of the proposed antenna #2 are found to be 8% (3.415 to 3.7 GHz), and 70.2% (2.4 to 5 GHz), respectively.","PeriodicalId":289886,"journal":{"name":"2017 International Workshop on Antenna Technology: Small Antennas, Innovative Structures, and Applications (iWAT)","volume":"49 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":"122644600","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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