This paper proposes a design approach of wide-band constant beamwidth beamformer based on second-order cone programming(SOCP)

considering the fact that the operating frequency bandwidth is narrow

when conventional beamformer applied to constant beamwidth beamforming.The approach includes: first

The working frequency band is divided into several narrow-band frequency range

second

make each sub-band beam on the center frequency get the best approximation of expect beam based on SOCP

to achieve the corresponding weight vector

and the main lobe of the beam of each sub-band center frequency constant.The results of computer simulation show that the method of improving wide-band beam based on SOCP is robust.