Magneto-inductive waveguide devices

Autor(en): Syms, RRA
Shamonina, E
Solymar, L
Stichwörter: BEAM-SPLITTERS; CRYSTAL DIRECTIONAL-COUPLERS; ELECTROMAGNETIC-WAVES; Engineering; Engineering, Electrical & Electronic; FABRICATION; LOADED TRANSMISSION-LINES; MAGNETOINDUCTIVE WAVES; PBG ENGINEERED STRUCTURES; PHOTONIC CRYSTALS; POTENTIAL APPLICATIONS; REFRACTIVE-INDEX MEDIA; Telecommunications
Erscheinungsdatum: 2006
Herausgeber: INSTITUTION ENGINEERING TECHNOLOGY-IET
Journal: IEE PROCEEDINGS-MICROWAVES ANTENNAS AND PROPAGATION
Volumen: 153
Ausgabe: 2
Startseite: 111
Seitenende: 121
Zusammenfassung: 
Devices formed from magneto-inductive waveguides based on coupled loop resonators are considered using simple analytic theory, initially assuming lossless propagation and nearest-neighbour coupling. Two-port devices that were considered include mirrors, Fabry-Perot resonators, Bragg gratings and tapers, while more general N-port devices include power splitters and directional couplers. Conditions for multiple-beam resonance and Bragg reflection in two-port devices are identified, and it is shown that quasi-optical filters may be constructed by simple layout variations. Conditions for low reflection are identified in splitters, and it is shown that matched three-port splitters with arbitrary power division ratios may be achieved for a particular input port. However, matching is not possible for all ports simultaneously. Directional couplers are shown to operate well only at mid-band and with weak coupling. The effect of loss is then examined and it is shown that idealised performance is obtained using resonators with sufficiently high Q-factors.
ISSN: 13502417
DOI: 10.1049/ip-map:20050119

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