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2018 22nd International Microwave and Radar Conference (MIKON)最新文献

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Design of broadband high-efficiency GaN power amplifiers 宽带高效氮化镓功率放大器的设计
2018 22nd International Microwave and Radar Conference (MIKON) Pub Date : 2018-07-09 DOI: 10.23919/MIKON.2018.8405184
P. Chen, T. Brazil
{"title":"Design of broadband high-efficiency GaN power amplifiers","authors":"P. Chen, T. Brazil","doi":"10.23919/MIKON.2018.8405184","DOIUrl":"https://doi.org/10.23919/MIKON.2018.8405184","url":null,"abstract":"We discuss the broadband design of high-efficiency GaN power amplifiers (PAs) using continuous modes. A Machine Learning approach to the full EM-based optimization of a hybrid design is first outlined and demonstrated experimentally. We then consider the challenges of achieving high efficiency in a broadband integrated PA, including the features of GaN transistors that facilitate broadband operation. It is shown that proper sizing of transistor can lead to an optimum load resistance close to 50fl, thereby extending the bandwidth of the output matching network of the PA in an integrated environment. We present techniques to realize the continuous-mode operation in an integrated GaN PA, with low loss and compact chip size. Finally, we show predicted results for the integrated GaN PA implementation.","PeriodicalId":143491,"journal":{"name":"2018 22nd International Microwave and Radar Conference (MIKON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129055640","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
Radar micro-Doppler of wind turbines: Low-frequency polarimetric extension of simplified analytical model 风力发电机雷达微多普勒:简化分析模型的低频极化扩展
2018 22nd International Microwave and Radar Conference (MIKON) Pub Date : 2018-07-09 DOI: 10.23919/MIKON.2018.8404996
Kajeng Wangkheimayum, O. Krasnov, Alexander G. Yarovoy
{"title":"Radar micro-Doppler of wind turbines: Low-frequency polarimetric extension of simplified analytical model","authors":"Kajeng Wangkheimayum, O. Krasnov, Alexander G. Yarovoy","doi":"10.23919/MIKON.2018.8404996","DOIUrl":"https://doi.org/10.23919/MIKON.2018.8404996","url":null,"abstract":"A simplified polarimetrie model for radar signal scattering on wind turbines (WT) is proposed, which can be used for interpretation of observation in time and Doppler domains. This model uses representation of real WT as slowly rotating linear wire structures. The earlier proposed model has been extended to more general cases of WT with arbitrary orientation and full polarimetric observations in mono- and bi-static cases, which can be used for analysis of low-frequency signals scattering. It gives a possibility to estimate the influence of scattered on WT electromagnetic waves not only on radars but also on communication links.","PeriodicalId":143491,"journal":{"name":"2018 22nd International Microwave and Radar Conference (MIKON)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126925539","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
APPR DoA estimation algorithm for smart antenna 智能天线的APPR DoA估计算法
2018 22nd International Microwave and Radar Conference (MIKON) Pub Date : 2018-07-05 DOI: 10.23919/MIKON.2018.8405301
H. Paaso, Matti Somersalo, M. Hoppari, J. Korpi, Mikko Hiivala, A. Mämmelä
{"title":"APPR DoA estimation algorithm for smart antenna","authors":"H. Paaso, Matti Somersalo, M. Hoppari, J. Korpi, Mikko Hiivala, A. Mämmelä","doi":"10.23919/MIKON.2018.8405301","DOIUrl":"https://doi.org/10.23919/MIKON.2018.8405301","url":null,"abstract":"In this paper, we propose a smart directional antenna with a reduced hardware complexity. We introduce also an adjacent power pattern ratio (APPR) direction of arrival (DoA) estimation algorithm for the smart antenna. The algorithm is demonstrated in a real world indoor environment and the estimated DoA results are in good agreement with the predicted angles. DoA estimation results show that the APPR algorithm with the proposed antenna can be a valuable solution to improve the performance of the wireless communication in the next generation systems where spectrum reuse, interference avoidance, as well as device localization are of special interest.","PeriodicalId":143491,"journal":{"name":"2018 22nd International Microwave and Radar Conference (MIKON)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128178878","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 multilayer dual-band filter using dual-mode resonators with second harmonic suppression 采用二次谐波抑制的双模谐振器的多层双带滤波器
2018 22nd International Microwave and Radar Conference (MIKON) Pub Date : 2018-07-05 DOI: 10.23919/MIKON.2018.8405260
N. Hansen, W. Gitzel, Stefan Radzijewski, Jan-Philip Mohncke, A. Jacob
{"title":"A multilayer dual-band filter using dual-mode resonators with second harmonic suppression","authors":"N. Hansen, W. Gitzel, Stefan Radzijewski, Jan-Philip Mohncke, A. Jacob","doi":"10.23919/MIKON.2018.8405260","DOIUrl":"https://doi.org/10.23919/MIKON.2018.8405260","url":null,"abstract":"A multilayer dual-band dual-mode bandpass filter with widely spaced passbands and using two independent square loop resonators is proposed. For improved stopband characteristics, the spurious second harmonic passband of the low frequency resonator is suppressed. The passbands are centered around 3 GHz and 9.35 GHz for application in a dual-frequency maritime radar. The simulated and measured results show good agreement.","PeriodicalId":143491,"journal":{"name":"2018 22nd International Microwave and Radar Conference (MIKON)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124165075","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
A simulation study of terahertz dielectric resonator using graphitic carbon nitride 氮化石墨碳太赫兹介质谐振腔的仿真研究
2018 22nd International Microwave and Radar Conference (MIKON) Pub Date : 2018-07-05 DOI: 10.23919/MIKON.2018.8405337
U. B. Memon, A. Ibrahim, A. Pattanayak, S. Duttagupta, A. Sarkar, R. Raman
{"title":"A simulation study of terahertz dielectric resonator using graphitic carbon nitride","authors":"U. B. Memon, A. Ibrahim, A. Pattanayak, S. Duttagupta, A. Sarkar, R. Raman","doi":"10.23919/MIKON.2018.8405337","DOIUrl":"https://doi.org/10.23919/MIKON.2018.8405337","url":null,"abstract":"A novel Graphitic Carbon Nitride (gCN) resonator was simulated using CST Microwave Studio. Rectangular and cylindrical resonators on quartz substrate were simulated over the frequency range, 0.4–2.75 THz. We further study the near field distribution of electric and magnetic field vectors to understand the spectral phenomena.","PeriodicalId":143491,"journal":{"name":"2018 22nd International Microwave and Radar Conference (MIKON)","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128124516","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
Mutual coupling reduction using metamaterial supersubstrate for high performance & densely packed planar phased arrays 利用超材料基板减少互耦，实现高性能高密度平面相控阵
2018 22nd International Microwave and Radar Conference (MIKON) Pub Date : 2018-05-15 DOI: 10.23919/MIKON.2018.8405323
M. Alibakhshikenari, A. Salvucci, G. Polli, B. Virdee, C. See, R. Abd‐Alhameed, F. Falcone, A. Andújar, J. Anguera, E. Limiti
{"title":"Mutual coupling reduction using metamaterial supersubstrate for high performance & densely packed planar phased arrays","authors":"M. Alibakhshikenari, A. Salvucci, G. Polli, B. Virdee, C. See, R. Abd‐Alhameed, F. Falcone, A. Andújar, J. Anguera, E. Limiti","doi":"10.23919/MIKON.2018.8405323","DOIUrl":"https://doi.org/10.23919/MIKON.2018.8405323","url":null,"abstract":"This paper proposes on an effective mutual coupling suppression technique for planar phased array. This is achieved locating a metamaterial superstrate patch between radiation elements of phased array. The superstrate patch is realised by incorporating slots inside the patch, where the slots are arranged in 2×3 array column. The proposed mutual radiation decoupling technique is implemented on FR-4 substrate. Average coupling suppression of 5 dB is achieved on a low permittivity substrate over its operational frequency band. The proposed technique is (i) simple to implement; (ii) planar design; (iii) easily realised in practice; (iv) overcomes the shortcomings of poor front-to-back ratio previously reported in other radiation suppression techniques; and (v) applicable for densely packed microstrip. Furthermore, the proposed planar technique is highly versatile for various applications having stringent performance requirements.","PeriodicalId":143491,"journal":{"name":"2018 22nd International Microwave and Radar Conference (MIKON)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121323755","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: 13
On low-fidelity models for variable-fidelity simulation-driven design optimization of compact wideband antennas 小型宽带天线变保真度仿真驱动设计优化的低保真度模型
2018 22nd International Microwave and Radar Conference (MIKON) Pub Date : 2018-05-14 DOI: 10.23919/MIKON.2018.8404991
S. Koziel, S. D. Unnsteinsson, A. Bekasiewicz
{"title":"On low-fidelity models for variable-fidelity simulation-driven design optimization of compact wideband antennas","authors":"S. Koziel, S. D. Unnsteinsson, A. Bekasiewicz","doi":"10.23919/MIKON.2018.8404991","DOIUrl":"https://doi.org/10.23919/MIKON.2018.8404991","url":null,"abstract":"The paper addresses simulation-driven design optimization of compact antennas involving variable-fidelity electromagnetic (EM) simulation models. Comprehensive investigations are carried out concerning selection of the coarse model discretization density. The effects of the low-fidelity model setup on the reliability and computational complexity of the optimization process are determined using a benchmark set of three ultra-wideband antennas designed for the best matching and for the minimum size. The optimization algorithm of choice is trust-region gradient search with low-fidelity model correction realized through frequency scaling and multiplicative output space mapping. The results indicate that appropriate low-fidelity model setup can be assessed using a correlation analysis based on the selected characteristic points of the antenna responses and sparsely allocated test designs, and the results are consistent across the considered benchmark set.","PeriodicalId":143491,"journal":{"name":"2018 22nd International Microwave and Radar Conference (MIKON)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125231588","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
Evaluation of BAQ on Tiangong-2 interferometric imaging radar altimeter data compression 天宫二号干涉成像雷达高度计数据压缩的BAQ评价
2018 22nd International Microwave and Radar Conference (MIKON) Pub Date : 2018-05-14 DOI: 10.23919/MIKON.2018.8405306
Xiaojin Shi, Yunhua Zhang, Xiao Dong
{"title":"Evaluation of BAQ on Tiangong-2 interferometric imaging radar altimeter data compression","authors":"Xiaojin Shi, Yunhua Zhang, Xiao Dong","doi":"10.23919/MIKON.2018.8405306","DOIUrl":"https://doi.org/10.23919/MIKON.2018.8405306","url":null,"abstract":"Tiangong-2 Interferometric imaging radar altimeter (InIRA) applies the technology of small incident angle and high precision interferometric phase measurement, which has the characteristics of wide swath, imaging and high accuracy height measuring. Compared with traditional altimeter, InIRA can realize much wider swath and can obtain SAR image of observed area, so there is a high requirement of onboard memory and downlink speed for InIRA. As a result, we need to investigate data compression technique for InIRA to reduce the data rate. As an efficient algorithm for SAR echoes data compression, Block Adaptive Quantization (BAQ) is widely used to spaceborne SAR system for raw data compression. The motivation of this work is to evaluate the influence of BAQ algorithm on interferometric coherence and sea surface height error for InIRA.","PeriodicalId":143491,"journal":{"name":"2018 22nd International Microwave and Radar Conference (MIKON)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126678152","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
Accurate analysis of whispering gallery modes in dielectric resonators with BoR FDTD method 用BoR时域有限差分法精确分析介电谐振腔的窃窃廊模式
2018 22nd International Microwave and Radar Conference (MIKON) Pub Date : 2018-05-14 DOI: 10.23919/MIKON.2018.8405207
M. Celuch, W. Gwarek
{"title":"Accurate analysis of whispering gallery modes in dielectric resonators with BoR FDTD method","authors":"M. Celuch, W. Gwarek","doi":"10.23919/MIKON.2018.8405207","DOIUrl":"https://doi.org/10.23919/MIKON.2018.8405207","url":null,"abstract":"This paper presents an accurate approach to FDTD analysis of whispering gallery modes in dielectric resonators. In those problems resonant frequencies are supposed to be extracted with relative errors below 10−4. It is widely believed that only custom — made software codes, based on mode matching methods, can meet such stringent accuracy requirements. Herein, we demonstrate how the required accuracy can be obtained with a general — purpose FDTD code, run within a new three — step procedure. Advantages of the FDTD approach include more flexibility in modelling scenarios with unusual shapes or / and lossy materials.","PeriodicalId":143491,"journal":{"name":"2018 22nd International Microwave and Radar Conference (MIKON)","volume":"416 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126699601","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
Machine learning for isotropic antenna design 面向各向同性天线设计的机器学习
2018 22nd International Microwave and Radar Conference (MIKON) Pub Date : 2018-05-14 DOI: 10.23919/MIKON.2018.8405325
Saifullah, Bilal Ahmed
{"title":"Machine learning for isotropic antenna design","authors":"Saifullah, Bilal Ahmed","doi":"10.23919/MIKON.2018.8405325","DOIUrl":"https://doi.org/10.23919/MIKON.2018.8405325","url":null,"abstract":"This research presents novel isotropic antenna designed by applying machine learning algorithm. Fitness proportionate selection algorithm resulted a design that has a total gain variation of 0.35 dB. This is the best design isotropy for an antenna with non-zero impedance so far reported in the literature. The design was optimized over parameters of isotropy, impedance, structure complexity and standing wave ratio (SWR). After compensating the imaginary part (jX Q) of impedance, the resulting wire antenna showed an input resistance of 48.3 Q at an operating frequency of 107 MHz. SWR is 1.03 reference to 50 Q transmission line. For VSWR ≤ 2, the bandwidth is 1 MHz. Isotropic property of learned antenna resulted to be independent of frequency-dimension scaling as well as independent from compensation of jX Q. All the simulations were performed in Numerical Electromagnetics Code (NEC) for evaluations. The measured variation in total gain for the fabricated antenna was 1.37 dB with an input impedance of 61.7 Q. The minimum SWR of 2.84 was observed at a slightly shifted frequency.","PeriodicalId":143491,"journal":{"name":"2018 22nd International Microwave and Radar Conference (MIKON)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124494599","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
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