Title :
Development of the EM Wave Absorber for ETC System Using MnZn-ferrite and Carbon
Author :
Song, Young Man ; Kim, Dong Il ; Choi, Chang-Mook ; Lee, Dae Hee
Author_Institution :
Dept. of Radio Sci. & Eng., Korea Maritime Univ. Dongsam-Dong, Busan
Abstract :
In this paper, we designed and fabricated the EM wave absorber for ETC system. We fabricated some samples in different composition ratio of MnZn-ferrite and Carbon with CPE and confirmed that optimum composition ratio of absorbing materials was MnZn-ferrite : carbon : CPE = 40 : 15 : 45 wt.%. The material properties such as complex relative permittivity and permeability were calculated by S-parameter. The EM wave absorber was fabricated based on simulated data. Simulated and measured data agree well. As a result, the developed EM wave absorber has a thickness of 3.38 mm and absorption ability over 20 dB at 5.8 GHz.
Keywords :
absorbing media; automated highways; carbon; electromagnetic wave absorption; ferrites; manganese alloys; microwave materials; C; C - Element; EM wave absorber; ETC system; MnZn; MnZn - Interface; MnZn-ferrite; absorbing materials; carbon; electric toll collection system; electromagnetic wave absorption; size 3.38 mm; Absorption; Equations; Material properties; Organic materials; Permeability; Permittivity measurement; Reflection; Roads; Scattering parameters; Sheet materials; Carbon; EM wave Absorption; EM wave absorber; ETC system; MnZn-ferrite;
Conference_Titel :
Microwave Conference, 2007. KJMW 2007. Korea-Japan
Conference_Location :
Okinawa
Print_ISBN :
978-1-4244-1556-4
DOI :
10.1109/KJMW.2007.4402246
