The frequency invariant beamforming (FIB) technology can receive the broadband signals from a certain direction without distortion. The research progress of the frequency invariant beamforming technology are reviewed, including basic sampling rate method, Bessel function method, new Fourier Transform method, concentric ring array method, etc. The principle of the related beamforming is analyzed, its features are compared and the related conclusions are drawn.自动控制技术与应用；王冬霞(1975-)，女，辽宁海城人，教授，硕士研究生导师。研究方向为阵列处理、语音处理、图像处理与通信技术.