This letter proposed a miniaturized frequency-selective rasorber (FSR). This FSR consists of a conducting sheet layer with embedded dual-bow resonators and a bandpass frequency-selective surface layer with a cross-ring slot. The structure exhibits absorption–transmission–absorption (A-T-A) characteristics that shows excellent transmission performance in 2.4 GHz band. The unit size of structure is 0.113 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\lambda _{L}$</tex-math></inline-formula> and the thickness is 0.071 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\lambda _{L}$</tex-math></inline-formula> , where <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\lambda _{L}$</tex-math></inline-formula> is the lowest frequency of the absorption band satisfying 80% absorption rate. The simulation results show that the center frequency of the transmission band is located at 2.42 GHz with 0.24 dB insertion loss. Under the condition of 80% absorption rate, the absorption bandwidth is 58.82% for the low-frequency absorption band, and 58.6% for the high-frequency absorption band. The concept of slope in mathematics is introduced into FSR for the first time to define steep drop characteristics. Finally, in order to verify the correctness of the analysis results, a prototype of FSR with 20×20 units is processed and measured, and the measured results are in good agreement with the simulation results.