X-대역 응용을 위한 광대역 전파 흡수체 설계

초록

In this paper, a wideband microwave absorber for X-band(8～12 GHz) applications is proposed. The structure of the proposed absorber unit cell consists of a resonator with a slot and slit, a backing ground plate, and a Taconic RF-30(εr=3, tanδ=0.0014) substrate with a dimension of 8.5×8.5×0.5 mm3. The proposed absorber has a dual resonance at 9.83 and 10.37 GHz. To demonstrate the operating principle of the proposed absorber structure at each resonance frequency, the simulated current distributions on the unit cell are analyzed. To verify the performance of the proposed absorber, a prototype absorber was fabricated with a planar array of 20×20 unit cells. The measured results exhibit two absorptivity peaks stronger than 99 % and full-width at half-maximum(FWHM) bandwidth of 1.1 GHz(9.51～10.61 GHz).

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