Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
An Investigation of beam scanning of arrays on cylindrical, conical and spherical surfaces
Download
index.pdf
Date
2015
Author
Takak, Yücel
Metadata
Show full item record
Item Usage Stats
239
views
96
downloads
Cite This
Recently, wide angle scanning antennas are often required especially in many radar applications. It is known that planar arrays have limited scan range without beam deformation. In this study design and production steps for wide angle scanning antenna arrays conformed on cylindrical, conical and spherical surfaces that operate at X-Band are investigated. Antenna elements used in these conformal arrays are designed using full wave electromagnetic solver tool HFSS. A MATLAB code for obtaining array patterns in principal planes using active element pattern is developed and it is verified by comparing the results with the ones obtained by HFSS for arrays with small number of elements. Fabricated antenna elements are produced and their conformability on desired surfaces is investigated. Non-planar surfaces where antenna located are produced using 3D printer. Designed antennas are conformed on the produced surfaces and their radiation patterns are measured for some scan angles. Obtained radiation patterns are in good agreement with simulation results.
Subject Keywords
Antennas (Electronics).
,
Antenna arrays.
,
Radar
URI
http://etd.lib.metu.edu.tr/upload/12618716/index.pdf
https://hdl.handle.net/11511/24622
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
Development of beam scheduling algorithm for frequency diverse array /
Çetiner, Ramazan; Demir, Şimşek; Department of Electrical and Electronics Engineering (2015)
Electronic scanning is the most desirable feature of radar systems. With electronic scanning, it is possible to steer the main beam of an array antenna instantaneously into a desired direction where no mechanical mechanism is involved in the scanning process. Electronic scanning methods including phase scanning, time delay scanning, and frequency scanning have been used in various radar applications; however new and cheaper scanning methods are still being investigated. It is the purpose of this thesis to i...
Analysis and design of cylindrically conformal microstrip antennas
Taşoğlu, Ali Özgür; Dural Ünver, Mevlüde Gülbin; Department of Electrical and Electronics Engineering (2011)
Cylindrically conformal microstrip antennas are investigated. Two different structures, namely proximity coupled and E-shaped microstrip antennas are analyzed and information about the design parameters is obtained by means of parametric study. With these structures, cylindrical arrays, having omnidirectional radiation in the circumferential plane of the cylinder, are designed. Proximity coupled cylindrical arrays operate in the 2.3-2.4 GHz aeronautical telemetry band with approximately 4% bandwidth. On the...
Analysis of spherical-rectangular printed antennas and antenna arrays using cavity model
Demir, Oğuz; Dural Ünver, Mevlüde Gülbin; Department of Electrical and Electronics Engineering (2017)
Printed antennas are commonly used since these antennas are preferred in many applications due to their advantageous properties. In order to employ these antennas in such applications, a thorough investigation and analysis are generally required. Although this can be implemented with fully numerical methods for the sake of high accuracy, the complex calculations required in the process lead to heavy computational load, hence generally demands high quality simulation software. In this thesis, the spherical-r...
Method of moments analysis of slotted waveguide antenna arrays
Altuntaş, Abdülkerim; Alatan, Lale; Department of Electrical and Electronics Engineering (2014)
Slotted waveguide antenna arrays are used extensively in many applications because of their high power handling capability, planarity, low loss and reduced profile. After the synthesis of such an array, the design should be verified by analyzing the array with an efficient simulation tool which is accurate, fast and flexible. Although FEM (Finite Element Method) based commercial softwares are very accurate and flexible, they are not sufficiently fast especially when it comes to optimization and fine tuning....
Dynamic modelling and control of a gimballed airborne antenna platform with mass unbalance and friction
Şeref, Tuğçe; Leblebicioğlu, Mehmet Kemal; Department of Electrical and Electronics Engineering (2018)
Inertial stabilized gimballed systems are widely-used in many applications to achieve a high precision positioning. Airborne antennas pointing target as a part of the satellite communication may be examples of such systems. This thesis presents the dynamic modelling and control of a two axes gimballed airborne antenna platform. First, reference frames and the transformation matrices are defined to build up the motion of the antenna and kinematic equations of each gimbal are derived. Next, the dynamic equati...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
Y. Takak, “An Investigation of beam scanning of arrays on cylindrical, conical and spherical surfaces,” M.S. - Master of Science, Middle East Technical University, 2015.
