A method for creating an enhanced array is provided. By setting a modulation mode indicator, the preferable technical scheme could be changed dynamically according to the modulation mode, so as to select the corresponding bits for the different modulation mode. The second medium is stacked on the first medium so as to cover the IDT electrode and has a temperature coefficient of group delay time TCD that is negative. Each said SAW resonator is formed by laying a film of aluminum on the substrate having a thickness and the SAW resonators have an average operating wavelength \u03bb where the ratio h\u03bb is in the range 0.