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
Beam Switching Reflectarray with MEMS Controls
Date
2010-04-16
Author
Bayraktar, Omer
Aydın Çivi, Hatice Özlem
Akın, Tayfun
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
215
views
0
downloads
Cite This
This paper presents a 26.5 GHz beam switching reflectarray monolithically fabricated on glass substrate with the RF MEMS switches. The array is formed using 10x10 aperture coupled microstrip patch antenna (ACMPA) elements. RF MEMS switches are implemented on the transmission lines in order to sustain the beam switching. A prototype of a reflectarray with 90 RF MEMS switches is monolithically produced using an in-house surface micromachining process including the wafer bonding steps. The measurement result shows that the beam can be switched to similar to 40 degrees as required.
Subject Keywords
Design
URI
https://hdl.handle.net/11511/53267
Collections
Department of Electrical and Electronics Engineering, Conference / Seminar
Suggestions
OpenMETU
Core
Design and characterization of electromagnetic wave absorbing structural compsites
Gürer, Göksu; Dericioğlu, Arcan Fehmi; Department of Metallurgical and Materials Engineering (2010)
Electromagnetic interference (EMI) is one of the most common problems encountered in microwave applications. Interaction of electromagnetic (EM) waves from different sources may result in device malfunction due to misinterpretation of the transferred data or information loss. On the other hand, development of materials with reduced radar detectability is desired in defense applications. Considering the limitations in weight and thickness, development of lightweight structural materials with enhanced electro...
NONDESTRUCTIVE MONITORING OF VARIATIONS OF RESIDUAL STRESSES IN STEEL WELDMENTS BY MAGNETIC BARKHAUSEN NOISE METHOD
Gür, Cemil Hakan; Batıgün, Caner; Çam, İbrahim (2013-07-18)
Variations of surface residual stresses as a function of weld runs in API 5L X70 steel plates were non-destructively monitored by Magnetic Barkhausen Noise (MBN) method. After each weld run, MBN signal and hardness distributions were recorded. MBN signals were converted into stress values by using a specific calibration procedure. The results were analyzed by considering microstructure investigations and hardness measurements, and then, they were compared with the results of X-ray diffraction measurements. ...
Multiband Microwave Metamaterials Based on Optimized Arrangements of Split-Ring Resonators
Ibili, H.; Keles, S.; Ergül, Özgür Salih (2019-01-01)
We present design and accurate simulations of multiband metamaterials that consist of three-dimensional arrangements of split-ring resonators (SRRs). In order to obtain multiband characteristics with resonances at multiple frequencies, SRRs with different sizes are arranged in well-designed grids. As opposed to unit cells with nested SRRs that are commonly used in the literature, using different-sized SRRs in array forms provide better flexibility in choosing resonance frequencies. On the other hand, strong...
Shape Optimizations of Metallic Sheets for Improved Near-Zone Scattering, Reflection, and Focusing Characteristics
Altinoklu, Askin; Ergül, Özgür Salih (2017-10-12)
We consider full-wave analysis and optimizations of metallic sheets to obtain desired electromagnetic responses in the near-zone field intensity and power density distributions. Given a metallic sheet of finite size, deformations are applied to achieve diverse scattering and reflection characteristics, particularly focusing and collecting electromagnetic power at different locations. Optimizations are performed by employing genetic algorithms in a multigrid scheme on the discretized geometry, while each tri...
Short wave infrared camera design and focal plane analysis
Bolat Beldek, Tuğba; Esendemir, Akif; Department of Physics (2012)
The subject of this study is the design of a camera, which has maximum volume of 50 mm x 50 mm x 300 mm, using short infrared wavelength providing Rayleigh criteria. Firstly, the required flux per pixel has been calculated. Throughout these calculations, atmospheric losses have been obtained by MODTRAN program. Also signal to noise ratio has been examined at minimum and maximum integration time intervals. The focal length of the camera has been calculated as it receives 1 m resolution from 8 km distance. Mo...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
O. Bayraktar, H. Ö. Aydın Çivi, and T. Akın, “Beam Switching Reflectarray with MEMS Controls,” 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/53267.