This paper investigates the harmonics radiated by a multibeam transmit array. A realistic power amplifier model represents the nonlinear response that goes to the array elements. The radiated harmonics are calculated using both phase shifters and time delay units.

Multibeam phased arrays in communications systems have the ability to transmit multiple signals in different directions. Ideally, the different signals in the different beams would be isolated and not interfere with each other. In reality, the main beams and sidelobes of the multi-beamed array interact and distort the desired signal in a given direction. Isolating the signals in the different beams is not feasible. As a result, a metric is needed to evaluate the signal quality transmitted in a beam and also the quality of the signal received in the far field.