Two-port acoustic wave sensor device

An acoustic wave sensor device, comprising:

• a quartz material layer comprising a planar surface;
• arranged along a first axis, a first interdigitated transducer disposed over the planar surface of the quartz material layer, a first reflection structure disposed over the planar surface of the quartz material layer, and a second reflection structure disposed over the planar surface of the quartz material layer;
• and
• arranged along a second axis, a second interdigitated transducer disposed over the planar surface of the quartz material layer, a third reflection structure disposed over the planar surface of the quartz material layer, and a fourth reflection structure disposed over the planar surface of the quartz material layer;
• and wherein:
• the first axis and the second axis are inclined to each other by a finite angle;
• and
• the planar surface of the quartz material layer is defined by a crystal cut of a quartz material of the quartz material layer with angles φ in the range of −14° to −24°, θ in the range of −25° to −45° and ψ in the range of +8° to +28°.