低频段厚度超薄的吸波片带宽很难展宽，为此设计了一种加载集总电阻的三方环嵌套吸波器，介质基板采用高介电常数的材料，从而实现在低频段的带宽展宽，并进行了理论分析与仿真。仿真结果表明，该吸波器吸波峰在1.33 GHz左右，在1.3~1.35 GHz有超过90%的吸收率，且极化不敏感，可实现宽入射角的吸波性能。最后，对介质的厚度、介电常数对吸波器性能的影响做了简要分析。

The bandwidth of ultra-thin sheet absorber in low frequency is difficult to broaden; therefore, a thri-square loop nested absorber loaded with resistors is designed in this paper. The substrate with high dielectric is utilized to realize broadening the frequency bandwidth. The theoretical analysis and simulation verification is described. The absorption rate of the absorber between 1.3 GHz and 1.35 GHz is more than 90% and the peak of the absorption rate is about 1.33 GHz; the absorber is insensitive to polarization and achieves high absorption rate in wide incidence angle. The effect of thickness and dielectric constant of the substrate on the absorber performance is analyzed briefly.