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Title: Miniaturized and reconfigurable notch antenna based on a BST ferroelectric thin film

Highlights: • A miniature and agile antenna based on a BST MIM capacitor is simulated and made. • Mn{sup 2+} doped BST thin films are synthesized by chemical deposition and spin coating. • Permittivity and losses of the BST thin film are respectively 225 and 0.02 at 1 GHz. • A miniaturization rate of 70% is obtained with a MIM capacitance of 3.7 pF. • A frequency tunability of 14.5% and a tunability performance of 0.04 are measured. - Abstract: This work deals with the design, realization and characterization of a miniature and frequency agile antenna based on a ferroelectric Ba{sub 0,80}Sr{sub 0,20}TiO{sub 3} thin film. The notch antenna is loaded with a variable metal/insulator/metal (MIM) capacitor and is achieved by a monolithic method. The MIM capacitance is 3.7 pF, which results in a resonant frequency of 670 MHz compared to 2.25 GHz for the unloaded simulated antenna; the resulting miniaturization rate is 70%. The characterization of the antenna prototype shows a frequency tunable rate of 14.5% under an electric field of 375 kV/cm, with a tunability performance η = 0.04.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [4] ;  [1] ;  [3] ;  [1] ; ; ;  [3]
  1. Institut d'Electronique et de Télécommunications de Rennes (IETR), IUT Saint-Brieuc, Université de Rennes 1, 22004 Saint-Brieuc (France)
  2. (France)
  3. IETR, Université de Nantes, 2 rue de la Houssinière, 44322 Nantes (France)
  4. CEA-LETI, Minatec, 17 avenue des Martyrs, 38054 Grenoble Cedex 9 (France)
Publication Date:
OSTI Identifier:
22475828
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 67; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANTENNAS; BARIUM COMPOUNDS; CAPACITANCE; DOPED MATERIALS; ELECTRIC FIELDS; FERROELECTRIC MATERIALS; LAYERS; MANGANESE IONS; METALS; MINIATURIZATION; OXIDES; PERFORMANCE; PERMITTIVITY; SIMULATION; SPIN-ON COATING; STRONTIUM COMPOUNDS; SYNTHESIS; THIN FILMS; TITANATES