2017 Antenna Measurement Techniques Association Symposium (AMTA)最新文献

Comparison of facilities for low level coupling tests in UAV EMC certification 无人机电磁兼容认证中低电平耦合试验设备的比较

2017 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2017-10-01 DOI: 10.23919/AMTAP.2017.8123703

S. F. Romero, D. Bocanegra, David Poyatos Martínez, M. A. Cancela, Patricia López Rodríguez

引用次数: 0

Nonredundant NF-FF transformation with spherical spiral scan for a non-centered quasi-planar antenna under test 非中心准平面天线球面螺旋扫描的非冗余NF-FF变换

2017 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2017-10-01 DOI: 10.23919/AMTAP.2017.8123691

F. D’Agostino, F. Ferrara, C. Gennarelli, R. Guerriero, M. Migliozzi

引用次数: 1

Radiation center estimation from near-field data using a direct and an iterative approach 用直接和迭代方法从近场数据估计辐射中心

2017 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2017-10-01 DOI: 10.23919/AMTAP.2017.8123714

C. Culotta-López, K. Wu, D. Heberling

{"title":"Radiation center estimation from near-field data using a direct and an iterative approach","authors":"C. Culotta-López, K. Wu, D. Heberling","doi":"10.23919/AMTAP.2017.8123714","DOIUrl":"https://doi.org/10.23919/AMTAP.2017.8123714","url":null,"abstract":"Spherical Near-Field (SNF) measurements are an established technique for the characterization of an Antenna Under Test (AUT). The normal sampling criterion follows the Nyquist theorem, taking equiangular samples. The sampling step size depends on the smallest sphere that, centered in the coordinate system of the measurement, encloses the AUT, i.e. the global minimum sphere. In addition, a local minimum sphere can be defined as the sphere with minimum radius which, centered in the AUT, encloses it alone. The local minimum sphere is always equal or smaller than the global minimum sphere, being equal when the AUT is centered in the coordinate system of the measurement. It is implied that the center of the local minimum sphere coincides with the radiation center. In this paper, the relative position of the radiation center of an AUT with respect to the center of the coordinate system of the measurement is estimated from SNF data using two approaches. The first approach takes the phase center as an estimation of the radiation center and is based on the method of moving reference point, strictly valid for the far-field case only. The second approach is based on a spherical modes spectrum analysis, iteratively translating the Spherical Wave Expansion (SWE) until the convergence criterion is met. Both methods are applied on undersampled systems by simulation for different cases and antennas. The estimation error of both methods is compared and discussed, highlighting the convenience of each method and an application with compressed sensing techniques.","PeriodicalId":405864,"journal":{"name":"2017 Antenna Measurement Techniques Association Symposium (AMTA)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134375306","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

Highly accurate fully-polarimetric radar cross section facility for mono- and bistatic measurements at W-band frequencies 高精度的全极化雷达横截面设施，用于w波段的单基地和双基地测量

2017 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2017-10-01 DOI: 10.23919/AMTAP.2017.8123697

A. Olk, Kais Ben Khadhra, T. Spielmann

{"title":"Highly accurate fully-polarimetric radar cross section facility for mono- and bistatic measurements at W-band frequencies","authors":"A. Olk, Kais Ben Khadhra, T. Spielmann","doi":"10.23919/AMTAP.2017.8123697","DOIUrl":"https://doi.org/10.23919/AMTAP.2017.8123697","url":null,"abstract":"Research in mm-wave has gained momentum in recent years and is requiring new laboratories and experimental methods. In this paper, a new mono- and bistatic radar cross section (RCS) facility operating at W-band frequencies is detailed. The mechanical system is capable of full target rotation and a large variation of the bistatic angle (25°-335°). It features exceptional precise alignment capabilities and a high positioning accuracy of <0.1°, which has been cross-checked by a double slit experiment. The fully-polarimetric mm-wave system consists of a static transceiver and a specially developed receiving unit that rotates around the target at a distance of 1 m. A polarimetric calibration is adapted to this facility, relying on canonical targets complemented by a novel highly cross-polarizing wire mesh fabricated in screen printing. This novel facility is studied in detail along with exemplary measurements such as the permittivity determination of a thin polyester film through Brewster angle determination. All calibrated measurements are in good agreement with numerical and analytical simulation.","PeriodicalId":405864,"journal":{"name":"2017 Antenna Measurement Techniques Association Symposium (AMTA)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130996736","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: 11

Acquisition, reconstruction, and transformation of a spiral near-field scan 螺旋近场扫描的采集、重建和转换

2017 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2017-10-01 DOI: 10.23919/AMTAP.2017.8123722

B. Walkenhorst, S. McBride

{"title":"Acquisition, reconstruction, and transformation of a spiral near-field scan","authors":"B. Walkenhorst, S. McBride","doi":"10.23919/AMTAP.2017.8123722","DOIUrl":"https://doi.org/10.23919/AMTAP.2017.8123722","url":null,"abstract":"The topic of non-redundant near-field sampling has received much attention in recent literature. However, a practical implementation has so far been elusive. This paper describes a first step toward such a practical implementation, where the practicality and generality are maximized at the expense of more acquired data points. Building on the theoretical work of faculty at the University of Salerno and University of Naples [1]-[17], the authors have acquired a set of near-field data using a spiral locus of sample points and, from those data, obtained the far-field patterns. In this paper, we discuss the acquisition system, the calculation and practical implementation of the spiral, the phase transformations, interpolations, and far-field transforms. We also present the resultant far-field patterns and compare them to patterns of the same antenna obtained using conventional near-field scanning. Qualitative results involving aperture back-projection are also given. We summarize our findings with a discussion of error, uncertainty, acquisition time, and processing time in this simplified approach to non-redundant sampling in a practical system.","PeriodicalId":405864,"journal":{"name":"2017 Antenna Measurement Techniques Association Symposium (AMTA)","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124289567","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

Low-profile endfire radiating wideband antenna for Ka band applications 用于Ka波段应用的低轮廓端射宽带天线

2017 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2017-10-01 DOI: 10.23919/AMTAP.2017.8123705

Joseph A. Ellis, P. Collins

引用次数: 1

A novel and innovative near field system for testing radomes of commercial aircrafts 一种用于商用飞机天线罩测试的新颖创新近场系统

2017 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2017-10-01 DOI: 10.23919/AMTAP.2017.8123718

M. Le Goff, N. Adnet, N. Gross, L. Duchesne, A. Gandois, L. Durand

引用次数: 3

International facility comparison campaign at L/C band frequencies 在L/C波段频率的国际设施比较活动

2017 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2017-10-01 DOI: 10.23919/AMTAP.2017.8123707

M. Saporetti, L. Foged, F. Las Heras, A. Alexandridis, C. Lopez, Y. Kurdi, M. S. Castañer

{"title":"International facility comparison campaign at L/C band frequencies","authors":"M. Saporetti, L. Foged, F. Las Heras, A. Alexandridis, C. Lopez, Y. Kurdi, M. S. Castañer","doi":"10.23919/AMTAP.2017.8123707","DOIUrl":"https://doi.org/10.23919/AMTAP.2017.8123707","url":null,"abstract":"Comparison activities in which a number of measurement facilities compare their measurements of the same antenna in a standard configuration have become important for documentation and validation of laboratory expertise and competence. It is also mandatory to have regular participation in such activities to obtain and maintain accreditations like ISO 17025. The main goal of the facility comparison activities is to provide a formal opportunity for the participants to validate and document their achieved measurement accuracy and procedures by comparison with other facilities. Since 2004, comparison campaigns with different scopes have been conducted on antenna measurements within various European activities. Results of these activities have led to improvement in antenna measurement procedures and protocols in facilities and contributions to standards. In this paper we report on a recent EurAAP facility comparison campaign involving a medium gain ridge horn, MVI-SH800. The antenna is equipped with an absorber plate to reduce the sensibility to the measurement set-up in order to evaluate the improvement with respect to the previous ACE intercomparison activity, involving the same antenna lacking of absorber plate. The campaign covers measurement in the L and C band frequencies in different facilities in Europe and USA.","PeriodicalId":405864,"journal":{"name":"2017 Antenna Measurement Techniques Association Symposium (AMTA)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124652953","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

Application of the translated-SWE algorithm for the characterization of antennas installed on cars using a minimum number of samples 应用平移swe算法对安装在汽车上的天线进行最小样本数表征

2017 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2017-10-01 DOI: 10.23919/AMTAP.2017.8123711

F. Saccardi, F. Rossi, F. Mioc, L. Foged, P. Iversen

{"title":"Application of the translated-SWE algorithm for the characterization of antennas installed on cars using a minimum number of samples","authors":"F. Saccardi, F. Rossi, F. Mioc, L. Foged, P. Iversen","doi":"10.23919/AMTAP.2017.8123711","DOIUrl":"https://doi.org/10.23919/AMTAP.2017.8123711","url":null,"abstract":"Automotive antenna measurements are increasingly demanding. Modern cars are equipped with a large number of integrated antennas, spanning a wide frequency range for a large number of applications. Integrated antennas are strongly coupled with the structure, final testing are thus performed on the vehicle to accurately determine the performance. The physical and electrical size of typical cars, impose different measurement challenges while performing radiated testing in automotive Spherical Near Field (SNF) ranges. At higher frequencies, the coupling between antenna and vehicle is often limited to the near vicinity of the antenna. It is therefore customary to position the vehicle in the range such that the measurement coordinate system is centered on the antenna. The sampling requirement, to represent the antenna and nearby environment, can be reduced while maintaining acceptable accuracy. In many cases, such desirable arrangement becomes impractical, either due to a high number of antennas to be tested in different positions or due to size of the range. The Translated Spherical Wave Expansion (Translated-SWE) has recently been introduced as an advanced post-processing tool to place the local coordinate system in any position within the measurement range [1-2]. This eliminate the necessity to move the vehicle during testing. In this paper, the Translated-SWE is applied to typical automotive measurements scenarios of antennas in displaced positions on vehicles. Sampling guidelines for full vehicle testing using this method are presented for the first time. Measurement accuracy is investigated experimentally on a 1:12 scaled vehicle with integrated antenna in a standard multi-probe system.","PeriodicalId":405864,"journal":{"name":"2017 Antenna Measurement Techniques Association Symposium (AMTA)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128659237","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: 11

A cylindrical reconfigurable antenna technology with full hemispherical coverage 具有全半球覆盖的圆柱形可重构天线技术

2017 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2017-10-01 DOI: 10.23919/AMTAP.2017.8123698

G. Kiesel, Efstrateos Strates

{"title":"A cylindrical reconfigurable antenna technology with full hemispherical coverage","authors":"G. Kiesel, Efstrateos Strates","doi":"10.23919/AMTAP.2017.8123698","DOIUrl":"https://doi.org/10.23919/AMTAP.2017.8123698","url":null,"abstract":"Reconfigurable antennas using a switched element architecture have the ability to electronically change their characteristics, adapting their band of operation, gain pattern, and polarization to meet the requirements of the system. Two cylindrical reconfigurable antennas are presented which tune over a wide band and steer over a wide field of view: a 133 mm diameter antenna providing a realized gain (gain with mismatch) better than a dipole from 1 GHz to 3 GHz and a 75 mm diameter antenna demonstrating steering about a full hemisphere. These antennas are constructed using a modular approach out of a series of identical boards which act as antenna pixels — electrically small segments that can be turned on and off to affect the antenna pattern. Each pixel contains RF switches and contacts for control wires on each side of the board. By fragmenting the reconfigurable antenna into individual pixel boards, one can construct antennas of arbitrary size and shape, allowing implementations to be designed for more gain or for a smaller footprint. Additionally, we show a single antenna's ability to achieve distinct configurations that each maintain gain in a specified direction while forming a null at a different offset angle.","PeriodicalId":405864,"journal":{"name":"2017 Antenna Measurement Techniques Association Symposium (AMTA)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121417824","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