Modeling and design of microwave devices based on ferromagnetic nanowires


Editie 1

As wireless communication systems are flourishing and operating frequencies are progressively increasing, there exists nowadays a strong demand for RF devices at millimeter wavelengths. Nonmetallic ferromagnetic materials, also called ferrites, have found wide applications in RF technology as they possess the combined properties of a magnetic material and an electrical insulator. The remarkable flexibility in tailoring the magnetic properties, the very high resistivity, price and performance considerations make ferrites the first choice materials for microwave applications. However, the frequency range of operation, the bandwidth, and the aptitude to be integrated in MMICs should be improved.

In this work, a new class of magnetic materials which could overcome the main disadvantages encountered when using ferrites in RF devices operating at millimeter wavelengths is studied. This material, called magnetic nanowired substrate (MNWS), is composed of an array of ferromagnetic nanowires embedded in a polymer substrate. First, the ferromagnetic nature of nanowires yields very high saturation magnetizations, thus operating frequencies higher than 40 GHz. Next, the nanometric wire diameter allows an easy penetration of electromagnetic waves inside the MNWS. Moreover, due to the high aspect ratio of nanowires the desired magnetic properties are obtained without an external magnetic field. This leads to a considerable potential increase of the compactness and ease of integration in MMICs. Various potential applications, such as filters and circulators, of this new material are presented.


Paperback - In het Engels 16,20 €

Gegevens


Uitgever
Presses universitaires de Louvain
Titel deel
Numéro 47
Auteur
Aimad Saib,
Collectie
Thèses de l'École polytechnique de Louvain
Taal
Engels
Categorie uitgever
> Toegepaste wetenschappen > Informatica > Netwerken en telecommunicatie
Categorie uitgever
> Toegepaste wetenschappen > Elektriciteit
Categorie uitgever
> Toegepaste wetenschappen
BISAC Subject Heading
TEC000000 TECHNOLOGY & ENGINEERING
Onix Audience Codes
06 Professional and scholarly
CLIL (2013)
3069 TECHNIQUES ET SCIENCES APPLIQUEES
Voor het eerst gepubliceerd
01 januari 2004
Type werk
Thesis
Oorspronkelijke taal
Engels

Paperback


Publicatie datum
2004
ISBN-13
9782930344775
Omvang
Aantal pagina's hoofdinhoud : 188
Code
70956
Formaat
16 x 24 x 1,1 cm
Gewicht
309 grams
Aanbevolen verkoopprijs
16,20 €
ONIX XML
Version 2.1, Version 3

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Scientific publications iv

Introduction ix

1 FMR Theory in Magnetic Nanowires 1

1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.2 Susceptibility tensor of infinite mediu