Acoustic wave device with acoustic obstruction structure

An acoustic wave device comprising:

• a support substrate including a first substrate portion, a second substrate portion, and a third substrate portion between the first substrate portion and the second substrate portion;
• a piezoelectric layer including a first portion over the first substrate portion and a second portion over the second substrate portion, a filter circuit formed on the first portion of the piezoelectric layer, a cancelation circuit formed on the second portion of the piezoelectric layer;
• patterned metal formed on the piezoelectric layer between the filter circuit and the cancelation circuit;
• and
• an acoustic obstruction structure disposed laterally between the first portion and the second portion of the piezoelectric layer, the acoustic obstruction structure configured to reduce acoustic coupling between the filter circuit and the cancelation circuit.