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
Broadband phase shifter realization with surface micromachined lumped components
Download
index.pdf
Date
2012
Author
Tokgöz, Korkut Kaan
Metadata
Show full item record
Item Usage Stats
280
views
144
downloads
Cite This
Phase Shifters are one of the most important building cells of the applications in microwave and millimeter-wave range, especially for communications and radar applications; to steer the main beam for electronic scanning. This thesis includes all of the stages starting from the theoretical design stage to the measurements of the phase shifters. In detail, all-pass network phase shifter configuration is used to achieve broadband and ultra wide-band differential phase characteristics. For these reasons, 1 to 2 GHz, 2 to 4 GHz, and 3 to 6 GHz 4-bit, 22.5° phase resolution phase shifter realization with surface micromachined lumped components are designed, simulated, fabricated and measured. Basic building blocks of the phase shifters, i.e., surface micromachined lumped components, square planar spiral inductors and Metal-Insulator-Metal capacitors are designed with EM simulation and lumped equivalent model extractions. The validation of the designed square planar spiral inductors is done with fabrication and measurement steps, very low error, below 1%, between the designs and fabricated samples are observed. Using this knowledge on lumped elements finally phase shifters are designed with surface micromachined lumped components, fabricated using an in house technology provided by METU-MEMS facilities, RF MEMS group. Low phase rms error, good return and insertion loss considerations are aimed, and achieved. In addition to the main work of this thesis, a generalized theoretical calculation method for 2n-1 number of stages all-pass network phase shifters is presented for the first time in literature. A different, new, broadband, and combined phase shifter topology using two-stage all-pass filters is presented. Moreover, the implementation of this idea is proved to be practical to 3 to 6 GHz 5.625° and 11.25° combined phase shifter. A new approach for stage numbers other than power of 2 is indicated, which is different from what is already presented in the literature. An example practical implementation results are provided for the three-stage 4-bit 1 to 6 GHz phase shifter. Also, a small improvement in SRF of the high inductance valued inductors is achieved with the mitering of the corners of square planar spiral inductors. Comparison of the measured data between the normal inductors and mitered versions shows that the first SRF of the inductors are increased about 80 MHz, and second SRF of the inductors are increased about 200 MHz.
Subject Keywords
Phase shifters.
,
Microwave communication systems.
,
Millimeter wave communication systems.
,
Micromachining.
,
Lumped elements (Electronics).
URI
http://etd.lib.metu.edu.tr/upload/12614652/index.pdf
https://hdl.handle.net/11511/21743
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
S-band hybrid 4 bit phase shifter using cots components
Erkek, Eser; Demir, Şimşek; Department of Electrical and Electronics Engineering (2009)
Microwave and millimeter-wave phase shifters are one of the most important structures of the antenna series that are used in communication and radar applications. They are used to form the main beam of the electronically scanned phase array antennas and generate the appropriate phase values for the antenna elements design while providing electronic beam steering. In this thesis, S-band hybrid 4 bit phase shifter of 22.5º phase resolution is designed, simulated, fabricated and measured. Bits are separately d...
Broadband spatial power combining in coaxial medium
Tanç, Zafer; Demir, Şimşek; Department of Electrical and Electronics Engineering (2012)
Microwave amplifiers having high output power are the essential components in many systems, such as radar and satellite communication. Although the structures generated by tube technologies fulfill the necessity of the required output power, the use of these amplifiers includes some critical drawbacks, one of which is the limited life of operation. Alternatively, solid-state amplifiers produced by transistor technology are preferred since they are high reliable devices. In order to provide the necessary out...
RF MEMS Based Millimeter Wave Phased Array for Short Range Communication
Bayraktar, Omer; Kobal, Enis; Sevinç, Yusuf; Cetintepe, Cagri; Comart, Ilker; Demirel, Kaan; Topalli, Ebru Sagiroglu; Akın, Tayfun; Demir, Şimşek; Aydın Çivi, Hatice Özlem (2015-05-17)
This paper presents millimeter wave phased array antenna for short range communication applications at 35 GHz. The antenna array is formed by 1 x 16 microstrip antipodal tapered slot antennas each connected to RF MEMS phase shifters for beam steering. The simulation and measurement results of the single antenna element are presented and the phase shifter structure to be used in the array is described in the paper. RF MEMS phase shifters are fabricated using an in-house surface micromachining process.
Improving the efficiency of microwave power amplifiers without linearity degradation using load and bias tuning in a new configuration
Ronaghzadeh, Amin; Demir, Şimşek; Department of Electrical and Electronics Engineering (2013)
Advanced digital modulation schemes used in the wireless applications, result in the modulated RF signals with high peak to average power ratio which requires linear amplification. On the other hand, the demand for a longer talk time with less battery volume and weight, especially in hand-held radio units, necessitate more power efficient methods to be utilized in power amplifier design. But improved linearity and efficiency have always been contradicting requirements demanding innovative power amplifier and...
Performance of transport protocols for multimedia communications in wireless sensor networks
Akan, Oezguer B. (2007-10-01)
Many wireless sensor network (WSN) applications require efficient multimedia communication capabilities. However, the existing communication protocols in the literature mainly aim to achieve energy efficiency and reliability objectives and do not address multimedia communication challenges in WSN. In this paper, comprehensive performance evaluation of the existing transport protocols is performed for multimedia communication in WSN. Performance metrics such as packet delivery rate, end-to-end packet delay, ...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
K. K. Tokgöz, “Broadband phase shifter realization with surface micromachined lumped components,” M.S. - Master of Science, Middle East Technical University, 2012.