What is described here is an array for multi-channel signal transmission between mobile units, consisting of at least one first transmitterreceiver unit that is coupled to at least one second transmitterreceiver unit via transmitting means. The bottom base has an upper surface formed with a plurality of first electrodes, and a lower surface formed with a plurality of second electrodes, an insulation layer is coated between each of the first electrode, so as to the upper surface of the bottom base is smooth. The second transistor includes an oxide semiconductor layer.