2019 Antenna Measurement Techniques Association Symposium (AMTA)最新文献_第5页

A Straightforward Dynamic Range Error Analysis 简单的动态范围误差分析

2019 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2019-10-01 DOI: 10.23919/AMTAP.2019.8906469

Marion C. Baggett, B. Walkenhorst

引用次数: 1

Fast Spherical Near-Field Measurements on Arbitrary Surfaces by Application of Pointwise Probe Correction to Compressed Sampling Schemes 基于点向探针校正压缩采样方案的任意表面球面近场快速测量

2019 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2019-10-01 DOI: 10.23919/AMTAP.2019.8906445

C. Culotta-López, D. Heberling

{"title":"Fast Spherical Near-Field Measurements on Arbitrary Surfaces by Application of Pointwise Probe Correction to Compressed Sampling Schemes","authors":"C. Culotta-López, D. Heberling","doi":"10.23919/AMTAP.2019.8906445","DOIUrl":"https://doi.org/10.23919/AMTAP.2019.8906445","url":null,"abstract":"The major disadvantage of Spherical Near-Field (SNF) measurements is their long acquisition time. To calculate the Antenna Under Test’s (AUT) far-field radiation characteristics, a sphere containing the AUT must be sampled. Classically, equiangular sampling is chosen, being the resulting sphere heavily oversampled. Since the Spherical Mode Coefficients (SMCs) are usually sparse, an approach to reduce the measurement time of SNF measurements is to undersample the sphere and to reconstruct the SMCs using compressed-sensing techniques. Using a sampling matrix with a minimum mutual coherence for the given bases of the SMCs increases the probability of recovery. The SMCs are defined in the basis of the spherical harmonics or Wigner D-functions, which limits the geometries in which this technique can be applied. In this work, the application of pointwise probe correction for the description of non-spherical surfaces in the Wigner-D basis expansion is suggested. The chosen sampling points are radially projected onto the measurement surface and the new distance to each point is calculated. New equivalent probe response coefficients are calculated per measurement point according to their distance to the AUT. To compensate for different orientations other than the probe pointing to the AUT’s minimum sphere’s center, the probe’s SMCs are rotated to reflect the real orientation of the probe at each point prior to the calculation of the probe response coefficients. Although more computationally demanding than classical probe correction, this technique allows measurements with different, potentially faster geometries and enables the application of compressed sensing to other, non-spherical conventional scanning systems.","PeriodicalId":339768,"journal":{"name":"2019 Antenna Measurement Techniques Association Symposium (AMTA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130316428","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

De-embedding Radome Depolarization from Measurements with a Non-Ideal Circularly Polarized Antenna Source 非理想圆极化天线源测量的反嵌入天线罩去极化

2019 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2019-10-01 DOI: 10.23919/AMTAP.2019.8906448

J. Roper, M. Miller, D. Runyon

引用次数: 0

Multiphysics Analysis of RF Pyramidal Absorbers 射频锥体吸收体的多物理场分析

2019 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2019-10-01 DOI: 10.23919/AMTAP.2019.8906386

Zhong Chen, H. Bayat, Anoop Adhyapak

{"title":"Multiphysics Analysis of RF Pyramidal Absorbers","authors":"Zhong Chen, H. Bayat, Anoop Adhyapak","doi":"10.23919/AMTAP.2019.8906386","DOIUrl":"https://doi.org/10.23919/AMTAP.2019.8906386","url":null,"abstract":"RF absorbers dissipate the incident electromagnetic wave by converting the RF energy into heat. In many applications, the absorbers can be subjected to high power incident fields. It is imperative to characterize and analyze the thermal behaviors for these high power applications. In this paper, a multi-physics (of EM and thermal) study has been conducted. The absorbers are first simulated in the ANSYS HFSS for electromagnetics. The absorbers are placed under plane wave incident field as well as from a pyramidal horn antenna in the near field. The output of the HFSS model is then imported to the thermal and computational fluid dynamics (CFD) tool, ANSYS ICEPAK. In order to obtain accurate thermal properties of the material, an experimental setup was designed. The simulation results are validated against measured data. Several effects are shown to affect the absorber internal temperatures for the same incident field level at the front of the absorbers, such as the antenna test distance to the absorber, the shape of the pyramid, and the measurement frequency. These simulation data provide greater insights into the heat dissipation and temperature distribution inside the absorbers.","PeriodicalId":339768,"journal":{"name":"2019 Antenna Measurement Techniques Association Symposium (AMTA)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123845749","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

Measurements of Non-Metallic Targets for the Austin RCS Benchmark Suite 非金属目标奥斯汀RCS基准套件的测量

2019 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2019-10-01 DOI: 10.23919/AMTAP.2019.8906300

J. T. Kelley, A. Yılmaz, D. A. Chamulak, C. Courtney

{"title":"Measurements of Non-Metallic Targets for the Austin RCS Benchmark Suite","authors":"J. T. Kelley, A. Yılmaz, D. A. Chamulak, C. Courtney","doi":"10.23919/AMTAP.2019.8906300","DOIUrl":"https://doi.org/10.23919/AMTAP.2019.8906300","url":null,"abstract":"A simulation-supported measurement campaign was conducted to collect monostatic radar cross section (RCS) data as part of a larger effort to establish the Austin RCS Benchmark Suite, a publicly available benchmark suite for quantifying the performance of RCS simulations. In order to demonstrate the impact of materials on RCS simulation and measurement, various mixed-material targets were built and measured. The results are reported for three targets: (i) Solid Resin Almond: an almond-shaped low-loss homogeneous target with the characteristic length of ~10-in. (ii) Open Tail-Coated Almond: the surface of the solid resin almond’s tail portion was coated with a highly conductive silver, effectively forming a resin-filled open cavity with metallic walls. (iii) Closed Tail-Coated Almond: the resin almond was manufactured in two pieces, the tail piece was coated completely with silver coating (creating a closed metallic surface), and the two pieces were joined. The measured material properties of the resin are reported; the RCS measurement setup, data collection, and post processing are detailed; and the uncertainty in measured data is quantified with the help of simulations.","PeriodicalId":339768,"journal":{"name":"2019 Antenna Measurement Techniques Association Symposium (AMTA)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124892824","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: 9

Experimental Validation of Minimum Redundancy Scanning Schemes in PNF Measurements at V band V波段PNF测量中最小冗余扫描方案的实验验证

2019 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2019-10-01 DOI: 10.23919/AMTAP.2019.8906326

M. Saporetti, L. Foged, F. D’Agostino, F. Ferrara, C. Gennarelli, R. Guerriero, D. Trenta

{"title":"Experimental Validation of Minimum Redundancy Scanning Schemes in PNF Measurements at V band","authors":"M. Saporetti, L. Foged, F. D’Agostino, F. Ferrara, C. Gennarelli, R. Guerriero, D. Trenta","doi":"10.23919/AMTAP.2019.8906326","DOIUrl":"https://doi.org/10.23919/AMTAP.2019.8906326","url":null,"abstract":"The planar wide-mesh scanning (PWMS) methodology is based on a non-redundant sampling scheme [1], [2] and is thus without loss of accuracy. It has the potential to enable much faster measurements than standard Planar Near Field (PNF) scanning that is based on denser, regular, equally spaced NF sampling fulfilling Nyquist criteria. In [3], the non-redundant methodology has been validated numerically by simulated measurements on a highly shaped reflector antenna and with actual measurements on a pencil beam antenna in Ku-band and on a navigation antenna in L-band.In this paper, we present the experimental verification of the PWMS methodology, at V band using dedicated PNF measurements of a Standard Gain Horn antenna MVG SGH4000.The results accuracy of the non-redundant methodology has been investigated against Far-Field patterns, implemented by standard scanning methods, by visual comparison, and by computation of the Equivalent Noise Level (ENL). The achieved under-sampling factor is equal to 12, corresponding to similar time reduction in the stepped measurement system employed for the presented validation.","PeriodicalId":339768,"journal":{"name":"2019 Antenna Measurement Techniques Association Symposium (AMTA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121767169","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

Top-loaded 60:1 Wideband Direction-Finding Sensor 顶部加载60:1宽带测向传感器

2019 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2019-10-01 DOI: 10.23919/AMTAP.2019.8906315

A. Robinson, G. Lasser

引用次数: 0

Comparison of Antenna Measurements Obtained Using an Electro-Optical Probe System to Conventional RF Methods 电光探头系统与传统射频测量方法的天线测量比较

2019 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2019-10-01 DOI: 10.23919/AMTAP.2019.8906502

William Dykeman, Benjamin Marshall, Dale Canterbury, Corey Garner, Richard Darragh, A. Sabet

{"title":"Comparison of Antenna Measurements Obtained Using an Electro-Optical Probe System to Conventional RF Methods","authors":"William Dykeman, Benjamin Marshall, Dale Canterbury, Corey Garner, Richard Darragh, A. Sabet","doi":"10.23919/AMTAP.2019.8906502","DOIUrl":"https://doi.org/10.23919/AMTAP.2019.8906502","url":null,"abstract":"There are certain applications where the use of electro-optical (EO) probes to acquire near-field measurements can provide major advantages as compared to conventional RF measurement techniques. One such application is in the area of high power RF measurements that are required for calibration and test of active electronically scanned arrays (AESA). The family of EO probes presented herein utilizes the Pockels effect to measure the time-varying electric fields of the antenna under test (AUT). The use of a non-invasive, broadband EO probe facilitates measurement of the tangential electric field components very close to the AUT aperture in the reactive near-field region. This close proximity between the AUT and the measurement probe is not possible with conventional metallic probes. In this paper, the far field gain patterns acquired using the EO probe will be compared to the corresponding gain patterns obtained from conventional far-field and near-field methods. The measurement results, along with the advantages and disadvantages of the EO system configuration, will be presented.","PeriodicalId":339768,"journal":{"name":"2019 Antenna Measurement Techniques Association Symposium (AMTA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128868513","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

Accurate Calibration of Truncated Spherical Near Field Systems with Different Ground Floors using the Substitution Technique 采用代入技术对不同地面层的截顶球面近场系统进行精确标定

2019 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2019-10-01 DOI: 10.23919/AMTAP.2019.8906365

F. Saccardi, F. Mioc, A. Giacomini, A. Scannavini, L. Foged, J. Estrada, P. Iversen, M. Edgerton, J. Graham

引用次数: 7

AMTA 2019 TOC

2019 Antenna Measurement Techniques Association Symposium (AMTA) Pub Date : 2019-10-01 DOI: 10.23919/amtap.2019.8906490

引用次数: 0