Modeliranje edukacijske laboratorijske makete aktivnog nefosterovskog metamaterijala

undergraduate thesis

• Title (english): Modelling of educational laboratory demonstrator of active non-Foster metamaterial
• Author: Katarina Lebo
• Mentor: Silvio Hrabar (mentor)
• Committee member: Silvio Hrabar (predsjednik povjerenstva)
• Committee member: Igor Krois (član povjerenstva)
• Committee member: Leo Vincelj (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2020-08-24, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

U ovom Završnom radu pokazana su svojstva metamaterijala, materijala čiji je razvoj započeo u 20. stoljeću. Metamaterijali pokazuju svojstva negativnog indeksa loma, i samim time negativne dielektrične permitivnosti i magnetske permeabilnosti.

Pokazana je istovjetnost dielektrične permitivnosti i kapaciteta te magnetske permeabilnosti i induktiviteta. Analiziran je nefosterovski negativni kondenzator i negativni induktivitet, pomoću kojih je moguće ostvariti negativne vrijednosti ε i µ.

Nefosterovski negativni kondenzator smanjuje ukupni kapacitet mreže na koju je priključen, stoga ga je moguće iskoristiti za povećanje fazne i grupne brzine jer su one povezane s permitivnosti i permeabilnosti. U pokušaju ostvarenja superluminalnih brzina, važno je razlikovati faznu i grupnu brzinu od brzine energije koja ne može putovati većom brzinom od svjetlosti. Ovi efekti simulirani su u Keysight Advanced Design System 2020, gdje se analizirala prijenosna zračna linija opterećena s tri negativna kondenzatora, a prototip ovakve linije nalazi se na Fakultetu elektrotehnike i računarstva u Zagrebu

Abstract (english)

This Final B.Eng. Report shows the properties of metamaterials. Development of metamaterials began in the 20th century. They show the properties of a negative refractive index and also negative dielectric permittivity and magnetic permeability.
The non-Foster negative capacitor was analyzed and so was the non-Foster negative inductor. These elements are equivalent to permittivity and permeability, so they show properties of negative values of ε and µ.
Non-Foster negative capacitor decreases overall net capacitance, so it can be used for increasing phase and group velocities. It is important to distinguish phase and group velocities from energy velocity, because energy cannot travel faster than light. These effects were simulated in Keysight Advanced Design System 2020. An air transmission line loaded with three negative capacitors was analyzed, and a prototype of such line can be found at the Faculty of Electrical Engineering and Computing in Zagreb.

• Keywords: metamaterijal; negativni indeks loma; negativni kondenzator; nefosterovski metamaterijal; superluminalne brzine
• Keywords (english): metamaterial; negative refractive index; negative capacitor; non-Foster metamaterial; superluminal velocities
• Language: croatian
• URN:NBN: urn:nbn:hr:168:011734
• 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 09:16:10