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
Development of a tuner topology for multiharmonic matching and implementation on tunable dual band power amplifier design
Download
index.pdf
Date
2018
Author
Kılıç, Hasan Hüseyin
Metadata
Show full item record
Item Usage Stats
264
views
154
downloads
Cite This
In this thesis work, the effect of multi-harmonic load matching on improving the efficiency of power amplifiers is investigated. Techniques of efficient power amplifier design are discussed and analyzed in terms of multi-harmonic matching. Several circuit topologies are evaluated for multi-harmonic matching by discussing the advantages and the limitations. Specifically, a detailed multi-harmonic analysis of the triple stub topology is presented. The already-known single frequency impedance matching capability of the triple stub circuit is extended to the 2nd and the 3rd harmonic frequencies. It is shown by analysis for the first time that the triple stub topology is able to satisfy impedance matching not only at the fundamental frequency but also at the 2nd and the 3rd harmonic frequencies simultaneously without any limitation on the fundamental and the harmonic impedances. A novel, highly efficient dual band power amplifier utilizing a tunable triple stub load matching circuit is also designed and implemented. Thanks to the tunable structure, efficiency is maximized in both operating bands of the power amplifier; even tough, the upper band is located at the 2nd harmonic of the lower band.
Subject Keywords
Power amplifiers.
,
Amplifiers (Electronics).
URI
http://etd.lib.metu.edu.tr/upload/12622487/index.pdf
https://hdl.handle.net/11511/27746
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
Design and fabrication of a high gain, broadband microwave limiting amplifier module
Kılıç, Hasan Hüseyin; Demir, Şimşek; Department of Electrical and Electronics Engineering (2011)
Microwave limiting amplifiers are the key components of Instantaneous Frequency Measurement (IFM) systems. Limiting amplifiers provide constant output power level in a wide input dynamic range and over a broad frequency band. Moreover, limiting amplifiers are high gain devices that are used to bring very low input power levels to a constant output power level. Besides, limiting amplifiers are required to provide minimum small signal gain ripple in order not to reduce the sensitivity of the IFM system over t...
Innovative approaches in Doherty amplifier design for higher efficiency and wider frequency bandwidth
Şahan, Necip; Demir, Şimşek; Department of Electrical and Electronics Engineering (2013)
In the first phase of this thesis, the design optimizations of the bias adapted Doherty power (BA-DPA) and asymmetric Doherty power amplifier (ADPA) are presented for maximum efficiency criteria in the high power region. BA-DPA is analyzed by a novel approach in terms of efficiency. The ideal efficiency characteristics of BA-DPA with different bias adaptation schemes are illustrated. The maximum conduction angle and periphery requirement of the class-C biased peaking power amplifier (PPA) to realize fully l...
Detection of high order M-ARY QAM symbols under transmitter nonlinearities
Gülgün, Ziya; Yılmaz, Ali Özgür; Department of Electrical and Electronics Engineering (2018)
We will investigate the nonlinear effects of power amplifiers on large constellation Quadrature Amplitude Modulation (QAM) in this study. A more than potential feat to enhance transmission rates in next generation wireless networks is high order QAM along with mm-wave transmission. Meanwhile, different types of nonlinearities in the transmitter side may hamper the transmitter rate and decrease receiver performances. From literature, outermost constellation points of QAM schemes are usually more adversely af...
Modeling of asymmetric intermodulation distortion and memory effects of power amplifiers
Yüzer, Ahmet Hayrettin; Demir, Şimşek; Department of Electrical and Electronics Engineering (2011)
This dissertation is focused on developing a new passband behavioral model in order to account for asymmetric intermodulation distortion resulted from memory effect. First, a measurement setup is prepared to measure the AM/AM, AM/PM distortion, magnitudes and the phases of intermodulation (IMD) and fundamental (FUND) components which are created by the amplifier where phase is calculated only by measuring magnitudes. Then, responses of a sample amplifier are measured for different excitation situations (cen...
An experimental study on Power Amplifier linearisation by artificial neural networks Yapay Sinir Aǧlari ile Güç Yükselteç Doǧrusalląstirma Amaçli Deneysel Bir Çalisma
Yesil, Soner; Kolagasioglu, Ahmet Ertugrul; Yılmaz, Ali Özgür (2018-07-05)
This paper represents an experimental study on the linearisation of Power Amplifiers especially on high output power regions by utilizing an artificial neural network structure and open-loop training method. For the same in-band output power, 9dB EVM and 6dB ACLR improvement has been observed on hardware by feeding the proposed digital predistortion signal (DPD) to the PA under test.
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
H. H. Kılıç, “Development of a tuner topology for multiharmonic matching and implementation on tunable dual band power amplifier design,” Ph.D. - Doctoral Program, Middle East Technical University, 2018.
