Design and realization of A 0.5-5 GHz cascaded feedback amplifier

Download
index.pdf
2015
Korkmaz, İbrahim Cem
Show full item record
184
views
58
downloads
Wideband amplification is one of the most examined study areas in microwave engineering. In this thesis work, 2-stage amplifier operating in decade bandwidth of 0.5-5 GHz is designed, simulated and demonstrated using two different discrete transistors. Designed amplifier is based on cascaded feedback amplifier concept. In order to flatten the gain of the designed amplifier, feedback topology is applied to both stages. Primarily, first stage is designed and demonstrated with flat gain of 7.8±1.2 dB and minimum return loss of 8.2 dB. After the second stage is designed, cascaded structure is formed and fabricated. Designed cascaded feedback amplifier has a flat gain of 17.1±1.8 dB and minimum return loss of 8 dB. Also, converting the schematic design of the amplifier into EM analysis in order to make a realistic simulation is explained in details in this thesis study.
Amplifiers (Electronics)., Broadband amplifiers., Feedback amplifiers., Microwave amplifiers.
http://etd.lib.metu.edu.tr/upload/12619240/index.pdf
https://hdl.handle.net/11511/24885
Graduate School of Natural and Applied Sciences, Thesis

Suggestions

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...
An extensible database architecture for nationwide power quality monitoring
Kucuk, Dilek; Inan, Tolga; Salor, Ozgul; Demirci, Turan; Akkaya, Yener; Buhan, Serkan; Boyrazoglu, Burak; Unsar, Ozgur; Altintas, Erinc; Haliloglu, Burhan; Cadirci, Isik; Ermiş, Muammer (2010-07-01)
Electrical power quality (PQ) data is one of the prevalent types of engineering data. Its measurement at relevant sampling rates leads to large volumes of PQ data to be managed and analyzed. In this paper, an extensible database architecture is presented based on a novel generic data model for PQ data. The proposed architecture is operated on the nationwide PQ data of the Turkish Electricity Transmission System measured in the field by mobile PQ monitoring systems. The architecture is extensible in the sens...
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...
A New approach for distributed amplifier design
Yılmaz, İsmail Gökhan; Koç, Seyit Sencer; Demir, Şimşek; Department of Electrical and Electronics Engineering (2012)
In this thesis work, a new distributed amplifier topology is discussed and applied to three different cases. The topology is based on dividing the frequency spectrum into channels and amplifying afterwards. The channelized and amplified signals are then combined at the output for broadband amplification. This topology is used in the design of a three channel 0.1-1 GHz amplifier with a gain of 14.5±0.6 dB. The design is fabricated, and then the measured and simulated results are compared. A second 0.1-1 GHz ...
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...
Citation Formats
İ. C. Korkmaz, “Design and realization of A 0.5-5 GHz cascaded feedback amplifier,” M.S. - Master of Science, Middle East Technical University, 2015.
METU IIS - Integrated Information Service open@metu.edu.tr