| Summary: | 碩士 === 國立臺北科技大學 === 電腦通訊與控制研究所 === 93 === ABSTRACT
Artificial materials possessing distinct physical characteristics from natural materials have received much attention in microwave applications. Due to these unique electromagnetic traits of artificial materials, how to analyze the rudimentary characteristics of artificial materials and facilitate the integration of artificial materials with microwave circuits has become an active research topic. Therefore, this thesis will investigate the fundamental characteristics of two kinds of artificial materials, electromagnetic band-gap (EBG) structures and left-handed materials (LHMs), and articulate how to take advantage of these distinctive traits of artificial materials.
First of all, this thesis has proposed two-order and three-order fractal planar EBG structures analyzed by reflection phase method to determine the band-stop region. In addition, a novel distributed left-handed micro-strip line, periodically arranged with broad-side coupled split-ring resonator and thin-wire in micro-strip line, has been experimentally implemented and theoretically analyzed by the reflection/transmission method, a material measurement technique that is utilized to determine the electromagnetic properties of LHML, such as effective refraction index, effective permittivity and permeability…etc. Moreover, the equivalent model of LHML could be extracted by quasi-static approximation and the experimental results well agree with the simulation predictions. Because the electromagnetic characteristics of these artificial materials are different from conventional materials, they can be widely applied to the microwave components and optic applications such as phase shifter, super lens, high-performance antenna and high-efficiency power amplifier…etc.
Key word: Artificial material, electromagnetic band-gap (EBG), left-handed materials (LHM).
|
|---|
