Mikrovalno pojačalo u klasi F u frekvencijskom području 2 do 4 GHz

master's thesis

• Title (english): Class-F microwave amplifier in the S-band
• Author: Matko Martinić
• Mentor: Dubravko Babić (mentor)
• Committee member: Dubravko Babić (predsjednik povjerenstva)
• Committee member: Dario Bojanjac (član povjerenstva)
• Committee member: Tomislav Suligoj (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2020-09-23, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

U ovom radu su opisani koraci dizajniranja F klase pojačala. Pojačalo je dizajnirano da tako da radi na frekvenciji od 2 GHz-a s ulaznom snagom od 5 dBm-a. Transistor je izmjeren i uspoređen s modelom u ADS-u. Simulacije u ADS-u su provedene bez dovoljno dobrih rezultata. Taj problem je riješen tako da se napravila posebna pločica na kojoj se mogla mijenjati impedancija na željenim harmonicima. Oblikovanje signala napona na drainu je postignuto s filterima i pomičnim kratkim spojem. Pokazano je kako različiti harmonici imaju utjecaja na oblik signala na drainu i poboljšanje svojstva pojačala snage.

Abstract (english)

In this thesis, steps in designing class F power amplifier were described. Amplifier is designed to work on 2 GHz with input power of 5 dBm. Transistor was measured and compared with its model in ADS. ADS simulation were carried out without decent results. To solve that problem, PCB with possibility of tuning was made. Waveshaping was done with filters and adjustable short circuits on second and third harmonic. It has been shown how different harmonics have impact on drain voltage waveform and improvement in PA's performance.

• Keywords: radiofrekvencijska pojačala snage; klasa F; ADS; efikasnost; harmonički filteri
• Keywords (english): radiofrequency power amplifiers; class F amplifiers; ADS; efficiency; harmonic filters
• Language: english
• URN:NBN: urn:nbn:hr:168:355909
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-01-13 13:02:13