Advisor(s)

Nian-Xiang Sun

Contributor(s)

Harris Vincent, Vittoria Carmine

Date of Award

2008

Date Accepted

2008

Degree Grantor

Northeastern University

Degree Level

M.S.

Degree Name

Master of Science

Department or Academic Unit

College of Engineering. Department of Electrical and Computer Engineering.

Keywords

Electrical and computer engineering, Magneto(di)electric, Antenna

Subject Categories

Antennas (Electronics)--Design and construction

Disciplines

Engineering

Abstract

In this paper we have examined the properties of high permittivity magneto(di)electric materials, and their uses in antenna applications. In particular, we have used these materials to counteract the narrowing of bandwidth, and the impedance mismatch due to the use of high permittivity ceramics as antenna substrates by themselves [1-6]. We have shown on a variety of different antennae how utilizing magnetic films can help to improve the antennas performance be it through bandwidth, directivity, or gain. These results include HFSS simulations, as well as fully experimentally tested and fabricated antennae. To achieve these substrates, we have also examined the properties and fabrication process of a wide range of materials. These materials include metallic thin films such as (Fe60Co40)85B15 and (Fe1-xGax)85B15 [7-10] as well as and spin spray (Ni1-xCox)Fe2O4 and (Ni1-xZnx)Fe2O4 ferrite materials [11]. In putting together these results we performed many different measurements on these films in regards to their thermal stability, magnetization and optimal thicknesses. We also examine the high permittivity ceramics themselves in detail to determine the conditions for their fabrication, and their optimization [12-14]. Together all of these materials have been used to observe miniaturization and significant enhancement of our antenna designs [15-18].

Document Type

Master's Thesis

Rights Holder

Andrew Daigle


View Full Text

Click button above to open, or right-click to save.

Included in

Engineering Commons

Share

COinS