1. Investigation of Wave Propagation Using Smart Antenna for Indoor Wireless Communication Presented by: Sunil Kumar 0603230 EC- 4

6. C onventional A ntennas & Arrays Omnidirectional Sectorized Antenna Top View Antenna Array Top View

7. WHY SMART ANTENNAS ARE SUPERIOR TO CONVENTIONAL ANTENNAS Switched Beam System Adaptive Array Antenna Array Desired User Interfering User Antenna Array Active Beam

8. Interference Rejection Comparison Desired Signals Co-channel Interfering Signals

12. An indoor WLAN design A 4-story office building (including basement). We plan to install a switched Smart Antenna on the 3rd floor. Switched Smart Antenna Interference 3 2 1 Basement No lobe

14. • Security: – Wired networks can have a physically secure transmission medium. • Access to the network: – Wireless network is more difficult to secure. • The transmission medium is open to anyone within the geographical range of a transmitter: – Data privacy is accomplished over a radio medium using encryption & authentication. • Encryption comes at increased cost. Challenges and Constraints

15. Layout of examined area

16. Antenna Model used in Simulation : (DE-ESMB) Using a directional antenna in wireless Accesses Point (AP) or terminal, the security level can be greatly improved in WLAN. The narrower the bandwidth, the better performance will be achieved for a certain wireless communication environment. In this simulation a 13-element dielectric-embedded electronically switched multiple-beam antenna array is adopted to form a single fixed-beam directional antenna. center grounded element active elements passive elements

19. position A1 position A2