Ladder-type surface acoustic wave device

Surface acoustic wave (SAW) circuitry comprising:

• a first SAW device comprising two first reflective structures, at least one first series interdigital transducer (IDT), and at least one first shunt IDT;
• and
• a second SAW device comprising two second reflective structures, at least one second series IDT, and at least one second shunt IDT, wherein:
• the first SAW device and the second SAW device are connected at a common point and coupled in series between a first signal point and a second signal point;
• the first SAW device and the second SAW device share a common piezoelectric layer;
• the first reflective structures, the at least one first series IDT, the at least one first shunt IDT, the second reflective structures, the at least one second series IDT, and the at least one second shunt IDT reside over the piezoelectric layer;
• the at least one first series IDT and the at least one first shunt IDT are arranged between the two first reflective structures;
• the at least one second series IDT and the at least one second shunt IDT are arranged between the two second reflective structures;
• the at least one first series IDT is coupled between the first signal point and the common point, and the at least one second series IDT is coupled between the common point and the second signal point;
• and
• the at least one first shunt IDT is coupled between a third signal point and ground, and the at least one second shunt IDT is coupled between a fourth signal point and the ground, wherein:
• at least the third signal point is connected to the first signal point or the fourth signal point is connected to the second signal point;
• and
• the first signal point, the second signal point, and the common signal point are not directly electrically connected.