In this paper, we designed a dual band metamaterial perfect absorber (MPA) for Ku band applications. The overall ultrathin layer of proposed absorber consists of square patch with 450 diagonal slot structure within a copper square patch which loaded on both sides of dielectric thickness 1.6 mm FR-4 substrate. The results show that designed MPA gives two absorption bands at 12.45 and 14.18 GHz and absorption rates are 99.73% and 99.87% respectively. The proposed dual-band absorber has a polarization sensitive characteristic, the absorption performance is almost changing with different polarization angles. Furthermore, resonance centres of two absorption bands can be adjusted by changing related parameters. The novelties of proposed structure are simple, easy fabricate, low cost, durable, suitable for real-time applications and long-term stability considering the fabrication technique and non-destructive measurement method. The dualband absorber can be used in practical applications such as bolometer, EM wave spatial filter and satellite communications.

在本文中，我们设计了一种用于 Ku 波段应用的双波段超材料完美吸收器 (MPA)。所提出的吸收器的整个超薄层由带有 450 个对角线槽结构的方形贴片组成，该贴片位于一个铜方形贴片内，该贴片加载在电介质厚度为 1.6 毫米的 FR-4 基板的两侧。结果表明，设计的 MPA 在 12.45 和 14.18 GHz 有两个吸收带，吸收率分别为 99.73% 和 99.87%。所提出的双波段吸收器具有偏振敏感特性，吸收性能几乎随偏振角不同而变化。此外，可以通过改变相关参数来调整两个吸收带的共振中心。所提出结构的新颖之处在于简单、易于制造、成本低、经久耐用、考虑到制造技术和无损测量方法，适合实时应用和长期稳定性。双波段吸收器可用于辐射热计、电磁波空间滤波器和卫星通信等实际​​应用。