1. Presented by Yin Xu Saide Zhu Saide Zhu Lening Wang Lening Wang New York Institute of Technology 2.1 GHz Passive SAW Sensor Driver

2. Surface Acoustic Wave Sensor

3. Convenience, humanity Temperature, blood pressure, Pulse, etc Feedback of input Why do we need SAW sensor?

5. Extremely small SAW sensors

6. Small Small Wireless Wireless No power supply(Passive) No power supply(Passive) Sensing diverse modalities Sensing diverse modalities 2.1 GHz operating frequency 2.1 GHz operating frequency What are the advantages of SAW sensor?

7. How does SAW sensor work?

8. SAW sensor cannot work by itself SAW sensor cannot work by itself Utilized using circuit design Utilized using circuit design SAW sensor is there! The most important thing is to design the circuit SAW sensor is there! The most important thing is to design the circuit How to use SAW sensor?

9. Small components Small components Circuits design in 2.1 GHz(high) Circuits design in 2.1 GHz(high) Hard to detect signals (weak) Hard to detect signals (weak) Schematic and PCB board design Schematic and PCB board design Cannot produce by ourselves Cannot produce by ourselves Hard to test Hard to test Design Challenges

10. Sending Receiving Circulator ANTENNAANTENNA SAW Design

11. Block Diagram Sending part Receiving part

12. Sending part (Schematic) Sending

13. Sending part (PCB)

14. Receiving part (Schematic) Receiving

15. Receiving part (PCB)

16. Assembling and testing

17. Sending part Receiving part

18. Results SAW sensor driverOutput

19. Wireless Wireless Small Small No-battery No-battery Anti-interference Anti-interference Conclusion Convenient

20. Questions?