Open AccessDevelopment and characterisation of (Mg, Mn) U ‐type microwave absorbing materials and its application in radar cross sections reduction
Author(s) -
Padhy Sankarsan,
Sanyal Subrata,
Meena Ram Swaroop,
Chatterjee Rantamala,
Bose Aniruddha
Publication year - 2014
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2012.0332
Subject(s) - permittivity , microwave , materials science , reflection loss , pellets , permeability (electromagnetism) , radar , radar cross section , composite material , ku band , dielectric , analytical chemistry (journal) , optics , composite number , optoelectronics , physics , chemistry , engineering , membrane , telecommunications , biochemistry , chromatography
The preparation and complex permittivity and permeability measurement of a new U ‐type of hexaferrite microwave absorbing material (Ba 4 Mg 2 − x Mn x Fe 36 O 60 ) is reported for different value of x in range 0 ≤ x ≤ 2. Complex permittivity and permeability values of hexaferrite pellets are measured using a vector network analyser (VNA) in X‐band. The reflection loss of the materials is computed for different values of x and thickness using the measured permittivity and permeability values. The optimum reflection loss is found to be −43 dB for hexaferrite pellet ( x = 0.5) at a thickness of t = 1.7 mm. Microwave absorbing paint pellets are prepared by mixing hexaferrite powder with polyimide solution and their complex permeability and permittivity are also measured using a VNA. Using these measured values, radar cross‐section reduction simulation for artillery shells has been carried out using electromagnetic simulation software in the 8–10 GHz frequency range. A maximum radar cross‐section reduction of 15 dB has been observed for a 30 mm artillery shell at 9 GHz.