Compensation method for beam tilt of broadband millimeter wave hybrid array

The invention discloses a compensation method for beam inclination of a broadband millimeter wave hybrid array. The compensation method comprises the following steps: S1, designing an analog beam forming vector of each sub-array according to an incident angle; s2, performing discrete Fourier transform on the signal of each sub-array to a frequency domain; s3, multiplying the frequency domain signal by the compensation phase Dm (fk) of the corresponding frequency point; and S4, carrying out inverse discrete Fourier transform to time domain output. According to the technical scheme of the invention, a designed sequence is added to each sub-array beam forming vector to counteract the influence of frequency selectivity caused by beam tilt in an equivalent channel formed by a physical channel and a phase shifter; meanwhile, phase compensation is carried out on sub-array response in a frequency domain, in-phase superposition of different sub-array gains is achieved, and higher array gains can be obtained while the