Low profile multi-beam former operating in wide frequency band

Recently, an outstanding wideband beamformer utilizing only space domain, not time or frequency domain, has been proposed, so called wideband spatial beamformer. The advantage of this beamformer is that it requires only attenuators or amplifiers to perform beam formation in wide frequency band as its weighting coefficients become real values. As a result tapped-delay lines, frequency filters or phase shifters are avoidable. This paper presents an extended work for the mentioned wideband spatial beamformer. The beamforming algorithm is modified in order to produce multi-beam patterns with one set of real-valued weights with the purpose of energy saving. The proposed concept is tested through simulation results to confirm beamforming capability.