Equal sidelobe level on the radiation pattern of the linear array antenna a method is described for obtaining an equal sidelobe level in the radiation pattern of a linear array by using digitally controlled attenuators rather than the digital phase shifters normally used to control the amplitude of the current. It controls the peak level of the sidelobed and the level in arbitrary directions in the radiation pattern at the same time. Simulation showed that the attenuators can be changed in steps of 0.03dB or less, so the quantisation error has less effect on the radiation pattern than do phase shifters. They are also less expensive.
