Mid-band 5G wireless network power amplifier research

Aleksandr Vasjanov

Doctoral dissertation

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This dissertation addresses the problems of ensuring efficient radio frequency transmission for 5G wireless networks. Taking into account, that the next generation 5G wireless network structure will be heterogeneous, the device density and their mobility will increase and massive MIMO connectivity capability will be widespread, the main investigated problem is formulated – increasing the efficiency of portable mid-band 5G wireless network CMOS power amplifier with impedance matching networks.

The dissertation consists of four parts including the introduction, 3 chapters, conclusions, references and 3 annexes.

The investigated problem, importance and purpose of the thesis, the object of the research methodology, as well as the scientific novelty are defined in the introduction. Practical significance of the obtained results, defended statements and the structure of the dissertation are also included.

The first chapter presents an extensive literature analysis. Latest advances in the structure of the modern wireless network and the importance of the power amplifier in the radio frequency transmission chain are described in detail. The latter is followed by different power amplifier architectures, parameters and their improvement techniques. Reported impedance matching network design methods are also discussed. Chapter 1 is concluded distinguishing the possible research vectors and defining the problems raised in this dissertation.

The second chapter is focused around improving the accuracy of designing lumped impedance matching network. The proposed methodology of estimating lumped inductor and capacitor parasitic parameters is discussed in detail provi-ding complete mathematical expressions, including a summary and conclusions.

The third chapter presents simulation results for the designed radio frequency power amplifiers. Two variations of Doherty power amplifier architectures are presented in the second part, covering the full step-by-step design and simulation process. The latter chapter is concluded by comparing simulation and measurement results for all designed radio frequency power amplifiers.

General conclusions are followed by an extensive list of references and a list of 5 publications by the author on the topic of the dissertation.

5 papers, focusing on the subject of the discussed dissertation, have been published: three papers are included in the Clarivate Analytics Web of Science database with a citation index, one paper is included in Clarivate Analytics Web of Science database Conference Proceedings, and one paper has been published in unreferred international conference preceedings. The author has also made 9 presentations at 9 scientific conferences at a national and international level.

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DOI: https://doi.org/10.20334/2019-017-M

Book details

Data sheet

Imprint No:
145×205 mm
164 p.
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