Experimental Analysis Of A Spherical Near Field To Far Field Transformation Algorithm
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: |
Publisher |
: |
Total Pages |
: 102 |
Release |
: 2016 |
ISBN-10 |
: OCLC:970394011 |
ISBN-13 |
: |
Rating |
: 4/5 (11 Downloads) |
Synopsis Experimental Analysis of a Spherical Near Field to Far Field Transformation Algorithm by :
Antennas are an indispensable part of any wireless system. The wireless industry is evolving quickly in the modern age, which requires more antenna specifications that are crucial to the over-all system performance. Therefore, antenna development requires a new technique to facilitate the antenna measurements. The objective of this research is to investigate and understand the process of the spherical near field to far field transformation. This research will contribute as part of an effort for a project to build a spherical near field antenna test chamber in the Electrical and Computer Engineering Department at Oakland University. In this study the theory behind the Algorithm that makes the near field antenna measurement valid was discussed, also the inputs and parameters to control the transformation performance were identified. Finally, the algorithm was validated using three data sets from different sources. First data set, Oakland University Automotive Antenna Range and its nearfield transformation software. Second, antenna simulation software. The third data set was collected from the Antenna Chamber that allows both far field and near field measurements. All outcomes successfully matched the actual far field patterns.
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: |
Publisher |
: |
Total Pages |
: 104 |
Release |
: 2015 |
ISBN-10 |
: OCLC:915848583 |
ISBN-13 |
: |
Rating |
: 4/5 (83 Downloads) |
Synopsis Spherical Near-field to Far-filed Algorithm Analysis by :
The ultimate objective of this thesis is to study antenna spherical near-field to far-field algorithm. From the vector solution of Maxwell's equation, spherical wave basic mode was calculated. Finally antenna spherical mode expression was calculated. Through the mode formula, we that how to find b[superscript H; subscript mn] and b[superscript E; subscript mn] were the key problem of the algorithm. The knowledge of fast Fourier transform and spherical Hankel function were needed to finish the calculation. Finally, a simulation study was also performed to justify the proposed theories and models. Additionally, NIST fortran codes were also studied and used to simulate the far-field pattern.
Author |
: Jesper E. Hansen |
Publisher |
: IET |
Total Pages |
: 408 |
Release |
: 1988 |
ISBN-10 |
: 086341110X |
ISBN-13 |
: 9780863411106 |
Rating |
: 4/5 (0X Downloads) |
Synopsis Spherical Near-field Antenna Measurements by : Jesper E. Hansen
This book describes the aspects of antenna test ranges, data processing schemes and measurement schemes.
Author |
: Anand Maheshwari |
Publisher |
: |
Total Pages |
: 64 |
Release |
: 2019-02-14 |
ISBN-10 |
: 3659879541 |
ISBN-13 |
: 9783659879548 |
Rating |
: 4/5 (41 Downloads) |
Synopsis Analysis of Near-Field and Near-Field to Far-Field Transformation by : Anand Maheshwari
Author |
: |
Publisher |
: |
Total Pages |
: 702 |
Release |
: 1995 |
ISBN-10 |
: UIUC:30112048646605 |
ISBN-13 |
: |
Rating |
: 4/5 (05 Downloads) |
Synopsis Scientific and Technical Aerospace Reports by :
Author |
: Wolfgang M. Boerner |
Publisher |
: |
Total Pages |
: 712 |
Release |
: 1985 |
ISBN-10 |
: UCSD:31822002319721 |
ISBN-13 |
: |
Rating |
: 4/5 (21 Downloads) |
Synopsis Inverse Methods in Electromagnetic Imaging by : Wolfgang M. Boerner
Author |
: Matthew B. Stephanson |
Publisher |
: |
Total Pages |
: |
Release |
: 2007 |
ISBN-10 |
: OCLC:122352531 |
ISBN-13 |
: |
Rating |
: 4/5 (31 Downloads) |
Synopsis A Fast Near- to Far-field Transform Algorithm by : Matthew B. Stephanson
Abstract: A frequent problem in computational electromagnetics is to calculate the electromagnetic field far from a radiating object. This has numerous applications, such as antenna analysis and determining the radar cross sections of airplanes, ships, etc. Another application to converting near field measurements, taken in an indoor measurement range for instance, and transforming them to the far-zone. However, when the field of a large object needs to be calculated in many directions, however, this computation can take too long to be practical. The goal of this project is to develop an algorithm to greatly speed up this calculation by using a divide-and-conquer approach. First, the necessary background information in electromagnetics and numerical methods is presented. Then, a near to far field transform with potential for O(N^1.5) time complexity is discussed, where N is the number of basis elements used to approximate the object's surface. Finally, the running time and accuracy of the algorithm is discussed, with comparisons to another near to far field computer program for two problem geometries, a VFY-218 airplane with N = 53,054 and an antenna array with N = 106,792. The results show the fast near to far transform can be 30 times faster with an RMS relative error of 2.05e-5, compared to traditional methods.
Author |
: Arthur D. Yaghjian |
Publisher |
: |
Total Pages |
: 44 |
Release |
: 1977 |
ISBN-10 |
: UIUC:30112106709345 |
ISBN-13 |
: |
Rating |
: 4/5 (45 Downloads) |
Synopsis Near-field antenna measurements on a cylindrical surface by : Arthur D. Yaghjian
Author |
: Vadim Serafimovich Kalashnikov |
Publisher |
: Springer Nature |
Total Pages |
: 163 |
Release |
: 2021-04-27 |
ISBN-10 |
: 9789813364363 |
ISBN-13 |
: 981336436X |
Rating |
: 4/5 (63 Downloads) |
Synopsis Near-Field Antenna Measurements by : Vadim Serafimovich Kalashnikov
This book is useful both for those who want to get initial information on the measurement of the antenna parameters, and for specialists directly involved in the experimental determination of the antenna parameters from the results of measuring the amplitude-phase distribution in the near zone of the antennas. Currently, the near-field method is the most common one for antenna measurements. In most books, an academic approach is given to the issue under consideration and it is difficult to use them for the direct organization of measurements. In many others, specific narrow issues are considered that are accessible to understanding only by highly qualified engineers/readers. The purpose of this book is to get rid of the above disadvantages by offering the reader a more accessible exposition and formulas by which appropriate computer programs can be written with minimal effort. The contents of this book allow interested specialists to be not only users of the near-field measuring facilities, but also help in understanding the principles of their work. This book is intended for engineers and specialists whose activities are related to experimental testing of radio characteristics of complex antenna systems, especially near-field measurements, and is also useful as a textbook for senior students in the field of “radioelectronics” and “radiophysics.”
Author |
: |
Publisher |
: |
Total Pages |
: 974 |
Release |
: 1999 |
ISBN-10 |
: STANFORD:36105021811372 |
ISBN-13 |
: |
Rating |
: 4/5 (72 Downloads) |
Synopsis International Aerospace Abstracts by :