Povećanje efikasnosti radio-frekvencijskog pojačala snage modulacijom napona napajanja

master's thesis

• Title (english): Increasing radio-frequency power amplifier efficiency by supply voltage modulation
• Author: Marko Kvesić
• Mentor: Tomislav Suligoj (mentor)
• Committee member: Tomislav Suligoj (predsjednik povjerenstva)
• Committee member: Marko Koričić (član povjerenstva)
• Committee member: Igor Krois (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2023-09-04, Croatia

Abstract

Komunikacijski sustavi koji koriste kompleksne modulacije signala smanjuju učinkovitost pojačala zbog visokog PAPR koeficijenta. Implementacija praćenja signala ovojnice mijenja radne točke pojačala kako bi stalno radila pri vršnoj snazi i bila učinkovitija. Napravljena je Load-Pull karakterizacija HCBT-ova raznih tehnoloških izvedbi i razmatrana je njihova primjena u režimu velikog signala u različitim radnim točkama. Razmatrana je primjena HCBT-ova u svrhe praćenja ovojnice signala i pojačalima snage klase A na 2.4 GHz do snaga 23 dBm-a. HCBT s uniformno dopiranim kolektorom (W06) pokazuje najbolja svojstva za primjenu u pojačalima s praćenjem ovojnice signala. Pokazano je kako se HCBT tehnologija može uspješno primijeniti u ET PA izvedbama, od pojačala snage do sklopki za moduliranje napona napajanja.

Abstract (english)

Communication systems that use complex signal modulation reduce the efficiency of power amplifiers due to high PAPR coefficient. The implementation of envelope tracking changes the operating points of the amplifiers to constantly operate near peak power, making them more efficient. Load-pull characterization of HCBTs of different technological structures has been performed and their application in high-power signal regimes at different operating points was considered. The application of HCBTs for envelope tracking purposes and Class A power amplifiers at 2.4 GHz up to power levels of 23 dBm has been examined. It has been demonstrated how HCBT technology can be successfully applied in ET PA implementations, ranging from power amplifiers to voltage supply modulation switches.

• Keywords: Pojačalo snage; Praćenje ovojnice signala; Bipolarni tranzistor s horizontalnim tokom struje; HCBT
• Keywords (english): Power Amplifier; Envelope Tracking; Horizontal Current Bipolar Transistor; HCBT
• Language: croatian
• URN:NBN: urn:nbn:hr:168:541634
• 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: 2023-10-11 09:30:43