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Transmission-Line Metamaterial Design Of An Embedded Line Source In A Ground Recess, Caglar D. Emiroglu
Transmission-Line Metamaterial Design Of An Embedded Line Source In A Ground Recess, Caglar D. Emiroglu
Masters Theses 1911 - February 2014
A transmission-line metamaterial design of a material-embedded electric line source radiating inside a ground recess is investigated. The media embedding the recessed line source are designed such that the embedded current creates the same radiation pattern as a line source over a flat conducting ground plane. Transmission-line metamaterial unit cell designs for the embedding media obtained from the transformation electromagnetics design technique are shown. The metamaterial design of the overall embedded source configuration is numerically tested using circuit simulations. It is shown that the embedded-source design creates the same radiation characteristics as the line source above a flat ground plane …
Resonant Antennas Based On Coupled Transmission-Line Metamaterials, Christopher S. Merola
Resonant Antennas Based On Coupled Transmission-Line Metamaterials, Christopher S. Merola
Masters Theses 1911 - February 2014
A novel microstrip patch antenna topology is presented for achieving a dual-band response with arbitrarily closely spaced resonances. This topology is based on a coupled transmission line structure in order to take advantage of the separation in propagation constants for parallel (even-mode) and anti-parallel (odd-mode) current modes. Applying a metamaterials inspired design approach, periodic reactive loadings are used to design the underlying transmission line to have specific propagation constants necessary to realize a desired separation between two resonant frequencies. Using a single probe feed for a finite coupled line segment, both even-and odd-mode resonances can be excited to radiate efficiently …