Optimiranje niskošumnog bipolarnog pojačala

undergraduate thesis

• Title (english): Optimization of Bipolar Low-Noise Amplifier
• Author: Nikola Jambrović
• Mentor: Tomislav Suligoj (mentor)
• Committee member: Tomislav Suligoj (predsjednik povjerenstva)
• Committee member: Josip Žilak (član povjerenstva)
• Committee member: Filip Bogdanović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2021-09-14, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Cilj rada je razviti pojačalo što boljih karakteristika, namijenjeno radu na 2.4GHz, korištenjem HCBT tehnologije. Opisani su koraci u dizajnu takvog pojačala. Naglašene su razlike između simulacije idealnih i realnih elektroničkih komponenti. Pokazano je da parazitne pojave vodiča tiskane pločice mogu značajno pokvariti karakteristike pojačala.
Opisan je postupak karakterizacije tranzistora u slučaju da njegov model nije dostupan, ili je netočan. Objašnjen je postupak izbora radne točke, s obzirom na tražene karakteristike pojačala.
Pojačalo je nakon simulacija sastavljeno na tiskanoj pločici. Prikazana je razlika između simulacije i stvarnog pojačala. Opisane su neke važnije mjerne metode neophodne za rad sa visokofrekventnim sklopovima.

Abstract (english)

The aim of this work is to develop an amplifier with the optimal characteristics, intended to work at 2.4GHz, using HCBT technology. Steps in the design of such an amplifier are described. The differences between the simulation of ideal and real electronic components are emphasized. It has been shown that the parasitic elements of printed circuit board conductors can significantly impair the characteristics of the amplifier.
A procedure for characterizing a transistor in case its model is not available, or is inaccurate, is described. Selection of the operating point is explained, given the required characteristics of the amplifier.
After the simulations, the amplifier was assembled on a printed circuit board. The difference between the simulation and the assembled amplifier is shown. Some important measurement methods necessary for working with high - frequency circuits are described.

• Keywords: Niskošumno pojačalo; visokofrekventno pojačalo; S parametri; faktor šuma; bipolarni tranzistor; prilagodna mreža; optimizacija
• Keywords (english): Low noise amplifier; high-frequency ampifier; S parameters; noise factor; bipolar transistor; matching network; optimisation
• Language: croatian
• URN:NBN: urn:nbn:hr:168:608131
• 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: 2023-01-13 15:08:31