Author : Ali Karami Horestani
Release : 2014
Genre : Metamaterials
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Metamaterial-inspired structures and their applications in microwave, millimeter-wave and terahertz planar circuits by : Ali Karami Horestani
Download or read book Metamaterial-inspired structures and their applications in microwave, millimeter-wave and terahertz planar circuits written by Ali Karami Horestani. This book was released on 2014. Available in PDF, EPUB and Kindle. Book excerpt: Metamaterials are generally defined as periodic composite structures that are engineered to modify the electromagnetic properties of materials, especially in order to achieve new physically realizable responses that may not be readily available in nature. The key to the application of metamaterial resonators for the synthesis of such effective media is their small electrical size. This feature can be also exploited for the miniaturization of planar circuits. Motivated by the need for miniaturized planar structures in mobile wireless systems, metamaterial-inspired structures are proposed throughout this thesis for the design of compact microwave, millimeter-wave and terahertz planar structures with improved performance. The thesis firstly proposes slow-wave and SRR-loaded coplanar strips resonators for the design of compact high quality factor balanced resonators for 60GHz VCOs in CMOS technology. Next, the thesis is focused on the miniaturization of microwave filters either by proposing resonators with dual-band functionality or through modifying the shape of metamaterial resonators. Shape modifications of metamaterial resonators are also used for the design of high-dynamic-range one- and two-dimensional displacement sensors as well as of a rotation sensor with improved dynamic range. It is further shown that high level of miniaturization can be achieved in a single-layer S-shaped SRR (S-SRR), if the loops of the S-SRR are excited by contra-directional magnetic fluxes, which makes the S-SRR very well suited for application in coplanar waveguide (CPW) technology. The thesis also proposes the dual counterpart of the S-shaped SRR, i.e., S-shaped complementary split ring resonator (S-CSRR) for application in the design of compact differential bandpass filters with inherent common-mode suppression. Finally, the application of SRRs to the design of compact bandpass filters for terahertz surface waves on single wire waveguides - the so-called planar Goubau lines (PGLs) - is studied numerically and experimentally. The results of this research show the versatility and potential of metamaterial-inspired resonators for the realization of miniaturized structures in planar technologies in different frequency bands.
