Abstract: An electronically scanned phased array antenna system which utilizes phase-only control in the generation of multiple beams simultaneously and having a coincident or common phase center so that the entire aperture is used to radiate available RF energy, thus using all of the RF power that the aperture can radiate.

Abstract: An architecture for a monopulse, active aperture array is provided which functions as a high precision error compensation system correcting both the Sum and the Difference beams simultaneously. The architecture incorporates; a radiating antenna, a transmit-receiver, a -3.01 dB Wilkinson divider operable to split the signal received from the transmit-receiver, a Sum plus Difference network, a Sum minus Difference network both of which accept the split signal from the -3.01 dB Wilkinson divider and simultaneously error compensate the beams, and a four port magic tee operable to output the error compensated signals from the Sum plus Difference network and the Sum minus Difference network.

Abstract: A six port junction (10) having relatively wide bandwidth, forms a basic building block for implementing a non-binary matrix and is comprised of a network including two 3-dB quadrature couplers (14, 16), one 4.8-dB quadrature coupler (18) and three coupled stripline transmission line fixed phase shifters (20, 22, 24) providing phase shifts of substantially -90.degree., -240.degree. and -30.degree. to provide a 120.degree. phase progression between three input ports (A, B, C). The six port junction can be combined with other like non-binary matrices or binary matrices for forming a beam forming network which is adapted to provide 2.sup.n .times.3.sup.m outputs.