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2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)最新文献

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Study on the internal surface charging of H2/O2 engine nozzles H2/O2发动机喷管内表面充注研究
2016 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2016-09-01 DOI: 10.1109/ICEAA.2016.7731447
H. Cao, J. B. Zhang, J. Ren, J. Xiao
{"title":"Study on the internal surface charging of H2/O2 engine nozzles","authors":"H. Cao, J. B. Zhang, J. Ren, J. Xiao","doi":"10.1109/ICEAA.2016.7731447","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731447","url":null,"abstract":"The charging caused by charged particles in the nozzle can disadvantage the aircraft while the H2/O2 rocket engine is in operation. Based on the kinetic theory of gases, this paper makes use of the Maxwell velocity distribution function of the particles to formulate a general equation of the internal surface charging electrical potential of the H2/O2 rocket engine nozzle. Factors such as the mass, temperature and density of the charged particles and the secondary electronic emission yield of the internal surface materials of the nozzle are considered hypothetically. The surface charging electric potential of varied cases is analyzed and the charging law is summarized.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123494352","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}
引用次数: 0
Determination of dielectric permittivity of concrete using microwave dielectric-loaded dual-waveguide sensor for infrastructure health monitoring 基础设施健康监测用微波介质负载双波导传感器测定混凝土介电常数
2016 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2016-09-01 DOI: 10.1109/ICEAA.2016.7731484
M. A. Islam, S. Kharkovsky
{"title":"Determination of dielectric permittivity of concrete using microwave dielectric-loaded dual-waveguide sensor for infrastructure health monitoring","authors":"M. A. Islam, S. Kharkovsky","doi":"10.1109/ICEAA.2016.7731484","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731484","url":null,"abstract":"In this paper, a dielectric-loaded microwave dual waveguide sensor (DWS) has been used to determine the complex dielectric permittivity of fresh concrete using measured magnitude of reflection coefficient and transmission coefficient. The proposed sensor consists of two standard X-band (8.2 GHz-12.4 GHz) rectangular waveguide sections and a metal plate as a common flange, which can be attached to a concrete specimen. The simulated magnitudes of reflection and transmission coefficients obtained with a guessed preset value of dielectric permittivity of concrete specimen are compared with measured ones until predefined accuracy level is achieved. The complex dielectric permittivity of the first-day concrete is determined. It is shown that its value provides a good agreement between measurement and simulations results.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127477199","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}
引用次数: 3
Influence of field polarity on harmonic radar detection of concealed electronics 场极性对隐蔽电子设备谐波雷达探测的影响
2016 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2016-09-01 DOI: 10.1109/ICEAA.2016.7731454
K. Hong, S. Braidwood, A. Halappa, Troy A. Kilpatrick, Ben Keane, D. Longstaff
{"title":"Influence of field polarity on harmonic radar detection of concealed electronics","authors":"K. Hong, S. Braidwood, A. Halappa, Troy A. Kilpatrick, Ben Keane, D. Longstaff","doi":"10.1109/ICEAA.2016.7731454","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731454","url":null,"abstract":"Methods for improving the detection of concealed electronics, such as those used in improvised explosive devices (IEDs), are of continuing interest. In this regard, the harmonic radar, which utilises the non-linear junction (NLJ) effect, offers the potential of useful stand-off ranges with a high probability of detection and low false alarm rate. This paper explains the principles of harmonic radar technology, describes a particular radar system design and configuration, and presents preliminary results from a recent experimental trial on the influence of polarisation on detection.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132070623","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}
引用次数: 3
Tunable bandpass frequency selective surface with embedded biasing 可调带通频率选择表面嵌入偏置
2016 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2016-09-01 DOI: 10.1109/ICEAA.2016.7731430
A. Ebrahimi, Z. Shen, W. Withayachumnankul, S. Al-Sarawi, D. Abbott
{"title":"Tunable bandpass frequency selective surface with embedded biasing","authors":"A. Ebrahimi, Z. Shen, W. Withayachumnankul, S. Al-Sarawi, D. Abbott","doi":"10.1109/ICEAA.2016.7731430","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731430","url":null,"abstract":"This article presents a tunable bandpass frequency selective surface (FSS) based on varactor diodes. The FSS is made of three metallic layers that are separated from each other by two thin dielectric spacers. Tunability is achieved by loading varactor diodes on the front and back layers. The varactors are connected to the middle layer wire grid and are tuned by applying a bias voltage between the middle and front/back layers wire grids. The proposed tuning concept is validated by fabricating an FSS prototype and testing it in a parallel plate waveguide setup.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130235969","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}
引用次数: 3
Wideband antennas for precision spectral radiometers for cosmology 用于宇宙学精密光谱辐射计的宽带天线
2016 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2016-09-01 DOI: 10.1109/ICEAA.2016.7731421
R. Subrahmanyan, A. Raghunathan, N. Shankar, Saurabh Singh, Sharath Puthige, N. Mahesh, M. S. Rao
{"title":"Wideband antennas for precision spectral radiometers for cosmology","authors":"R. Subrahmanyan, A. Raghunathan, N. Shankar, Saurabh Singh, Sharath Puthige, N. Mahesh, M. S. Rao","doi":"10.1109/ICEAA.2016.7731421","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731421","url":null,"abstract":"Precision cosmology has been made possible by differential microwave radiometers that have imaged the anisotropy in the cosmic microwave background radiation. Continued progress is expected from measurement of spectral distortions in this cosmic radiation. A key distortion in the global sky spectrum is in the 40-250 MHz band and expected from variations in the hydrogen spin temperature and ionization state during Cosmic Dawn and Epoch of Reionization when the first stars and galaxies form. Electrically-small shaped ultra-wideband antennas are described that have been designed for the detection of these global or all-sky spectral distortions; a key design feature is the making of the transfer function Maximally Smooth.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121804075","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}
引用次数: 0
A 700W push-pull AlGaN/GaN power amplifier for P-band aerospace application 用于p波段航空航天应用的700W推挽式AlGaN/GaN功率放大器
2016 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2016-09-01 DOI: 10.1109/ICEAA.2016.7731425
S. Tang, L. Gu, Q. Wang, X. Li, Y. Xu, T. Chen, Y. Yang
{"title":"A 700W push-pull AlGaN/GaN power amplifier for P-band aerospace application","authors":"S. Tang, L. Gu, Q. Wang, X. Li, Y. Xu, T. Chen, Y. Yang","doi":"10.1109/ICEAA.2016.7731425","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731425","url":null,"abstract":"This paper proposed a novel internally pre-matching network for high power and high efficiency power amplifier design. Based on this matching network, a push-pull GaN power amplifier with the high saturated output power of 805 W and peak PAE of 74.5% is realized. The proposed power amplifier can provide a relatively stable output power above 58.5 dBm (707 W) in the band of 400 MHz to 500 MHz while maintain a stable gain above 17.5 dB.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125112108","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}
引用次数: 5
On absence of sources at infinity and uniqueness for waveguide solutions 波导解的无穷远无源性和唯一性
2016 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2016-09-01 DOI: 10.1109/ICEAA.2016.7731515
B. Nilsson, A. Ioannidis, Y. Ivanenko, S. Nordebo
{"title":"On absence of sources at infinity and uniqueness for waveguide solutions","authors":"B. Nilsson, A. Ioannidis, Y. Ivanenko, S. Nordebo","doi":"10.1109/ICEAA.2016.7731515","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731515","url":null,"abstract":"This paper discusses criteria for establishing uniqueness of wave propagation problems. Causality, or passivity that implies causality, is adopted as the fundamental principle. It is stressed that radiation conditions are not applicable for waveguide modes that carry no active power. The Jones' criteria for causality in the frequency domain, which covers the convectively unstable case, are presented and analysed, the vanishing absorption principle, VAP, in particular. It is proposed to use L2 for a lossy medium but a weighted L2 for the lossless case.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122429012","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}
引用次数: 1
Continuously tunable delay line based on eye-like ring resonator 基于眼状环形谐振器的连续可调延迟线
2016 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2016-09-01 DOI: 10.1109/ICEAA.2016.7731482
A. T. L. Hui, X. Yi, S. Song, L. Nguyen
{"title":"Continuously tunable delay line based on eye-like ring resonator","authors":"A. T. L. Hui, X. Yi, S. Song, L. Nguyen","doi":"10.1109/ICEAA.2016.7731482","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731482","url":null,"abstract":"We proposed a proof-of-concept silicon-on-insulator (SOI) compatible tunable delay line. The thermally controlled eye-like ring resonator add/drop filter is utilized. By controlling the optical power coupling into the resonator through the temperature-controlled Mach Zehnder Interferometer (MZI) power splitter, a continuously tunable group delay is obtained. A considerable group delay of 627 ps can be achieved in over-coupling condition while maintaining the optical loss less than 25 dB. Particularly when the resonator is under-coupled, maximum pulse advancement of 574 ps with similar transmission exists which extends the span of tunability from slow light to fast light in a single device. With the eye-like resonator, a total tunable range exceeding 1 ns is achievable and the overall device foot print can be kept smaller than 0.019 mm2.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122592092","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}
引用次数: 2
Pulse injection of a PT symmetric circuit PT对称电路的脉冲注入
2016 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2016-09-01 DOI: 10.1109/ICEAA.2016.7731439
R. Gardner
{"title":"Pulse injection of a PT symmetric circuit","authors":"R. Gardner","doi":"10.1109/ICEAA.2016.7731439","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731439","url":null,"abstract":"This paper considers the electronic failure mechanism known as upset. Upset represents a recoverable system failure in a circuit or system. For example, a computer that stops until rebooted represents such a failure. Failure illumination thresholds are often close to or below operating levels but have carefully chosen waveform parameters. Parity-time reversal (PT) symmetric circuits are used as examples.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126984108","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}
引用次数: 1
3D printed miniaturized quadrifilar helix antenna 3D打印小型化四线螺旋天线
2016 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2016-09-01 DOI: 10.1109/ICEAA.2016.7731467
Y. Tawk, M. Chadoud, M. Fadous, E. Hanna, J. Costantine, F. Ayoub, C. Christodoulou
{"title":"3D printed miniaturized quadrifilar helix antenna","authors":"Y. Tawk, M. Chadoud, M. Fadous, E. Hanna, J. Costantine, F. Ayoub, C. Christodoulou","doi":"10.1109/ICEAA.2016.7731467","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731467","url":null,"abstract":"This paper presents the design of a 3D printed quadrifilar helix antenna. The antenna is miniaturized by loading the tip of each helix by metallic circles of equal dimensions. The effect of decreasing the resonant frequency is also achieved by introducing a dielectric material within the antenna's physical structure. A prototype is fabricated and tested to prove the proposed technique. A good agreement is obtained between the theoretical and measured results.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127996606","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}
引用次数: 4
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