Broadband impedance-matched electromagnetic structured ferrite composite in the megahertz range
- Electromagnetic and Acoustic Materials Group, Department of Physics and Astronomy, University of Exeter, Stocker Road, Exeter, Devon EX4 4QL (United Kingdom)
- DSTL, Salisbury, Wiltshire SP4 0JQ (United Kingdom)
A high refractive-index structured ferrite composite is designed to experimentally demonstrate broadband impedance matching to free-space. It consists of an array of ferrite cubes that are anisotropically spaced, thereby allowing for independent control of the effective complex permeability and permittivity. Despite having a refractive index of 9.5, the array gives less than 1% reflection and over 90% transmission of normally incident radiation up to 70 MHz for one of the orthogonal linear polarisations lying in a symmetry plane of the array. This result presents a route to the design of MHz-frequency ferrite composites with bespoke electromagnetic parameters for antenna miniaturisation.
- OSTI ID:
- 22300102
- Journal Information:
- Applied Physics Letters, Vol. 104, Issue 22; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
Similar Records
High frequency permeability and permittivity spectra of BiFeO{sub 3}/(CoTi)-BaM ferrite composites
A Wide-Band Electromagnetic Impedance Profiling System forNon-Invasive Subsurface Characterization
Planar metamaterial-based beam-scanning broadband microwave antenna
Journal Article
·
Thu May 07 00:00:00 EDT 2015
· Journal of Applied Physics
·
OSTI ID:22300102
+6 more
A Wide-Band Electromagnetic Impedance Profiling System forNon-Invasive Subsurface Characterization
Conference
·
Fri Dec 17 00:00:00 EST 2004
·
OSTI ID:22300102
Planar metamaterial-based beam-scanning broadband microwave antenna
Journal Article
·
Wed May 21 00:00:00 EDT 2014
· Journal of Applied Physics
·
OSTI ID:22300102