Simulation Studies on Near-field Beam Focus Control of Conformal S-band Array of 3 Horn Antennas PDF Download
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Author: Kartavya Maheshbhai Patel
Publisher:
ISBN:
Category :
Languages : en
Pages : 120
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Author: Kartavya Maheshbhai Patel
Publisher:
ISBN:
Category :
Languages : en
Pages : 120
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Author: Divyangkumar K. Joshi
Publisher:
ISBN:
Category :
Languages : en
Pages : 96
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Author: Dhara Kiritkumar Trivedi
Publisher:
ISBN:
Category :
Languages : en
Pages : 82
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Author: Shun-Ping Chen
Publisher: Springer Nature
ISBN: 3031217659
Category : Technology & Engineering
Languages : en
Pages : 141
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Book Description
This book is designed for both the scientific audience, research and development engineers and the university students. The fundamentals of radio frequency antenna beam forming is explained in this book. The principles of beam focusing and beam steering in near field and far field are visualized with 2D and 3D simulations and compared with measurement results. Besides linear and planar antenna arrays, also conformal arrays, i.e. concave and convex antenna arrays, suitable for certain applications, are investigated and presented. Also related applications of radio frequency beam forming like open loop and closed loop large scale antenna arrays or massive MIMO, which is one of the break-through technologies for 5G and future 6G and involves an extremely large number of antenna elements for the multi-user beam forming, as well as thinned antenna arrays with electrically large distances between the antenna elements are discussed.
Author: Dwija Reddy Aloori
Publisher:
ISBN:
Category :
Languages : en
Pages : 90
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Book Description
This project will focus on the application of advanced electromagnetic simulation software 4nec2, for the near-field characterization of a 3-element S-band array of horn antennas, operating at the ISM frequency of 2.4 GHz. Previous modeling efforts have shown a significant difference between simulated and measured data. The key effort in this project will be to minimize the difference between simulated and measured data using 4nec2 software. This study has useful application in the area of clinical hyperthermia, which is defined as the therapeutic treatment of tumors in the body by heating caused by focused RF or microwave radiation. The 3-element array consists of a central focusing element and two surrounding directing elements. The focusing element can be axially adjusted and surrounding elements are fixed to focus the beam of a required point, which is necessary in hyperthermia treatment.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 978
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Author: Muhammad Faisal Iqbal
Publisher:
ISBN:
Category :
Languages : en
Pages : 134
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Author: Dustin Brown
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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A proliferation of large active electronically-scanned arrays (AESA) is enabling precise beam steering in wireless communication links at millimeter wave carrier frequencies. In addition to radiated power, linear and nonlinear distortion from the transceivers and array elements must also be examined to discern their relative effects on received signal quality in the far field. For digital signals, error vector magnitude (EVM) represents a complete measure of the amplitude and phase distortion in a wireless channel. This work focuses on the analysis, simulation, and measurement of the EVM resulting from transmission by millimeter-wave antennas and phased arrays. An ultra-wideband (UWB) model of antenna transmission based on the vector effective length is presented and applied to EVM simulation of over-the-air (OTA) links for a microstrip patch and conical horn antenna at two different 5G FR2 bands. The EVM for the conical horn link is measured using a multi-port vector network analyzer (VNA) and compact antenna test range (CATR) provided by Keysight Technologies in Santa Rosa, CA. The same simulation and measurement techniques are then applied to analysis of phased array transmission to understand the effects of beam squint and embedded element frequency response. The EVM of individual active array element channels and the fully-active 8x8 phased array are measured as a function of RF carrier power, far field observation angles, beam scan angles, and modulation rates using MATLAB instrument control scripts. The feasibility of estimating the EVM of far field antenna links from the planar near fields (PNF) is also investigated. A theoretical framework for calculating EVM from wideband far fields derived through PNF transformations and results from PNF simulations and measurements of a Ka-band conical horn and 8x8 phased array are presented. Finally, the effective range of a vehicle-to-infrastructure antenna link at 5.9 GHz is estimated by calculating received power along a linear highway using the Friis free space transmission equation and full-wave simulations of base station and vehicular antenna arrays.
Author: Sridhar Nayakwadi
Publisher:
ISBN:
Category :
Languages : en
Pages : 102
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Author: Amandeep Panaich
Publisher:
ISBN:
Category :
Languages : en
Pages : 501
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