Evaluations of Radar Absorbing Coating materials in the Microwave Frequencies

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J. Korean Ceram. Soc. > Volume 36(6); 1999 > Article

Journal of the Korean Ceramic Society 1999;36(6): 571.

마이크로 주파수에서 전파 흡수성 코팅재료의 특성 평가

임종인, 김찬욱, 오택수

포항산업과학연구원, 재료공정연구센터 금속코팅재료연구팀

Evaluations of Radar Absorbing Coating materials in the Microwave Frequencies

ABSTRACT

This paper describes both electromagnetic properties and electromagnetic-wave absorbind (EMA) characteristics of the radar absorbing coating materials in the microwave frequencies. The coating materials are prepared by mixing ferrite powder with epoxy resin polymers. The electromagnetic property and the EMA characteristics of the coating materials are measured in the frequency ranges between 0.2 GHz and 15GHz using the S-parameter method. The results show that the typical coating material has ({{{{ {μ }`_{r } ^{' } }} of about 2 and ({{{{ { ε}`_{r } ^{' } }} of about 4. And the coating materials have a little EMA characteristics in the frequency from 4 to 6 GHz and more improved EMA characteristics around 12 GHz And it is desirable for improvement of the EMA characteristics of the coating materials to properly select electromagnetic properties of constitutional materials inthe interesting frequency ranges.

Key words: Coating material, Radar absorbing material, S-parameter, Electronmagnetic property, Two-port method