This is a kind of new technology, and also reveals about all the features

1. Switchable directional antenna
system for uwb-based iOt
applications
By,
M.KARNAKAR
Reg.17304016

2. INDEX
 Introduction
 Advantages of directional antenna
 Internet of things(IoT)
 Applications
 Problems in narrow band systems
 Advantages of UWB
 Switchable directional antenna for UWB-IOT applications
 prototype
 Low-cost planner antenna
 Antenna patterns, measurements
 RF switching network
 conclusion
 Next steps
 References

3. INTRODUCTION
By enabling control of direction of power radiation of directional antenna,
 Reduce channel contention
 Increase the communication range of nodes
Consequently ,
 Increase the throughput
 Energy efficiency of low power wire less networks

4. IOT APPLICATIONS
 Operated in narrow band
 Operate in globally available 2.4GHz Band
 Moved to sub-1GHz
 LoRA
 SIGFOX

5. IOT APPLICATIONS

6. PROBLEMS IN IOT APPLICATIONS WITH NB
 Multipath fading
 Cross –technology interference

7.  higher immunity to multi path fading
 An improved interference mitigation
 Very good time domain resolution for accurate localization and tracking
ADVANTAGES OF UWB

8. SWITCHABLE DIRECTIONAL ANTENNA
FOR UWB-IOT APPLICATIONS

9. PROTOTYPE SYSTEM
Consist of
 DW1000 RF transceiver
 ARM Cortex M3 Host processor
 RF switching network
 4 directional antenna

10. DW1000 TRANSCEIVER

12. RF SWITCHING NETWORK
 Ultra CMOS RF switch from peregrine semiconductor
 High speed switching 5 micro sec
 Consumes lower current 90 micro amp
 No insertion loss at 4.5-8GHz
 1-2dB loss

13. RF SWITCHES

14. PLANER ANTENNA
 Four antennas arranged in 4directions
 Angular shift 90 degrees
 Covers 360 degrees

15. ANTENNA PATTERNS, MEASUREMENTS
Gain[dB] HPBW[degree]
Sector(blue) 3.068dB 88
Sector(purple) 3.380 dB 100
Sector(orange) 2.742 dB 98
Sector(yellow) 2.922 dB 108

16. ANTENNA PATTERNS

17. NEXT STEPS

18. REFERENCES
 [1] deca wave ltd.DW1000 datasheet
 [2] low cost directional antenna in 2.4GHz IEEE 802.15.4
 [3]RF switching technologies