Microwave Studies on Strontium Ferrite Based Absorbers |
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Authors: | A Verma RG Mendiratta TC Goel DC Dube |
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Affiliation: | (1) Department of Physics, Indian Institute of Technology, Hauz Khas, New Delhi, 110016, India |
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Abstract: | Single layer microwave absorbers based on strontium ferrite-epoxy composites have been fabricated and their reflection loss characteristics studied in the X-band (8–12.4 GHz) of microwave frequencies. Permittivity (r – jr) and permeability (r – jr) of Co and Ti added strontium ferrite SrCo
x
Ti
x
Fe12 – 2x
O19 (x = 0.1 to 0.9 in steps of 0.2), have been measured. Thickness of the absorber is an important criterion influencing the absorption characteristics. Composites of 3 mm thickness are found to absorb over a reasonable range of X-band frequencies. A minimum reflection loss of –36.5 dB is observed for the composite with x = 0.3. |
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Keywords: | microwave strontium ferrite composites absorbers dielectric constant permeability electrical thickness |
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