Scanned microstrip arrays using simple integrated ferrite phase shifters

A phase-steered microstrip antenna array is presented, suitable for applica tion as a mobile vehicle satellite terminal. Phase shifters are implemented on a hybrid dielectric-ferrite substrate, and use is made of the phase tra nsition near the cut-off region of the biased ferrite. Small permanent magn ets and carefully biased ferrites remove the need for large applied electro magnetic fields. 2-, 3-and 4-element demonstrator arrays have been construc ted, and up to 30 degrees beam squint has been achieved for applied magneti c biases of about 100Oe.