Bandwidth enhancement of stacked dielectric resonator antennas excited by a coaxial probe: an experimental and numerical investigation

Autor:	H.H.B. Rocha, M.G. da Silva, Francisco Nivaldo Aguiar Freire, Cynthia Junqueira, M Santos, R. S. T. M. Sohn, Antonio Sergio Bezerra Sombra, T. Cordaro
Rok vydání:	2008
Předmět:	Materials science business.industry Bandwidth (signal processing) Dielectric Dielectric resonator Optics Excited state Electronic engineering Cylinder Antenna feed Electrical and Electronic Engineering business Temperature coefficient Ground plane
Zdroj:	IET Microwaves, Antennas & Propagation. 2:580-587
ISSN:	1751-8733 1751-8725
DOI:	10.1049/iet-map:20070292
Popis:	An experimental and numerical investigation about bandwidth enhancement of dielectric resonator antennas (DRAs) using multiple DRAs, arranged according to a ‘stacked’ configuration is reported. The antenna consists of two cylindrical discs of the dielectrics Cr0.75Fe1.25O3 (CRFO) and Fe0.5Cu0.75Ti0.75O3 (FCTO) stacked vertically, placed above a ground plane and excited by a coaxial probe. The lateral edge of the cylinder should be placed against the feed probe, which excites the ${\rm HEM}_{11{\rm \delta}}$ mode. The numerical procedure is performed through a software package based on the finite-element method. An excellent agreement between theoretical and experimental results is observed. The concept of increasing the bandwidth of the DRA by stacking is verified. For the first time, the temperature coefficient of resonant frequency (τf) was also measured for CRFO and FCTO ceramics.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::db3c4e55e6596a6a218eb196f0d3c55c https://doi.org/10.1049/iet-map:20070292 Zobrazit plný text záznamu