Bipolarno radio-frekvencijsko pojačalo snage

undergraduate thesis

• Title (english): Bipolar radio-frequency power amplifier
• Author: Matej Štefanac
• Mentor: Tomislav Suligoj (mentor)
• Committee member: Tomislav Suligoj (predsjednik povjerenstva)
• Committee member: Josip Žilak (član povjerenstva)
• Committee member: Željko Osrečki (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2020-07-08, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

U ovome je radu prikazan postupak projektiranja radio-frekvencijskog pojačala snage sa HCBT-om za rad na frekvencijama 900MHz i 2,4GHz. Definirani su parametri koji će se određivati tijekom projektiranja: pojačanje snage, kolektorska efikasnost, efikasnost dodane snage, točka kompresije, S parametri i stabilnost. Objašnjene su karakteristike mikrotrakastih linija. Opisana je struktura bipolarnog tranzistora s horizontalnim tokom struje. Prilagodba impedancije je izvedena pomoću L-mreže za frekvenciju 900MHz i pomoću stuba za frekvenciju 2,4GHz. Za oba pojačala je prikazana istosmjerna analiza i prema njoj određivanje vrijednosti impedancije trošila za maksimalan prijenos snage metodom load pull. Parametri pojačala su simulirani u programu Advanced Design Systems s modelima HCBT-a, mikrotrakastih linija i komponenata iz Muratinog kataloga. Tiskana pločica je projektirana u programu KiCad.

Abstract (english)

This thesis shows a radio-frequency power amplifier designing procedure with HCBT for frequencies 900MHz and 2.4GHz. Main power amplifier parameters were defined: power gain, collector efficiency, power added efficiency, compression point, S parameters, and stability. Microstrip line characteristics were described. Structure of Horizontal Current Bipolar Transistor was shown. Impedance matching was derived with L-network for a frequency of 900MHz, and with stub for a frequency of 2.4GHz. They have presented DC analyses for both amplifiers, and, with these results, have determined the value of impedance for which is maximum power transfer with the load-pull method. All parameters were simulated in Advanced Designs Systems software with models of HCBT, microstrip lines, and components from the Murata catalog. PCB was designed in KiCad software.

• Keywords: pojačalo snage; klasa A; HCBT; RF
• Keywords (english): power amplifier; class A; HCBT; RF
• Language: croatian
• URN:NBN: urn:nbn:hr:168:161007
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka elektrotehnike i informacijske tehnologije (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-01-14 21:49:00