1. Reconfigurable Low Profile Antenna James Soon Advisor: Dr. Prasad Shastry

2. Topics Introduction Inputs/Outputs Modes of Operation Methods Diagrams Equipment List Schedule

3. Why reconfigurable antennas?  Cost  Reliability Cost  One is cheaper than two Reliability  Two are better than one

4. Diversity  Time  Space  Frequency  Polarization

5. Project objectives  Design  Simulation  Manufacture  Analysis

6. Single port frequency diverse device

7. Dual port polarization diverse device

8. Modes of Operation Transmit mode  Applied rf signal converted to radiated signal Receive mode  Radiated signal converted to received rf signal

9. Microstrip construction

10. Microstrip antennas

11. Coplanar waveguide construction

12. Radiation characteristics

13. Research Several antenna research articles SUNG, Y.J., JANG, T.U., KIM, Y.S., ‘A Reconfigurable Antenna for Switchable Polarization, IEEE Microwave and Wireless Letters, Volume 14, Number 11, November 2004, pp. 534 - 536.

14. Antenna with switchable polarization

16. Undetermined Design Characteristics Antenna construction  Coplanar  Microstrip Antenna feed structure  Microstrip line  Probe Diode biasing  Independent  Single point

17. Data sheet Gain > 5dBi Frequency Range: 1.5 – 1.6 GHz range Return Loss < -15 dB Radiation pattern Polarization: Linear, RHCP, LHCP Bandwidth: approx. 2% VSWR 2.0:1

18. Methods CAD tools - SONNET, PCAAD, ADS, Momentum Microwave Integrated Circuit Fab Lab Network Analyzer, Aneochoic Chamber Labview, VEE Pro

19. Equipment List PIN diodes Varactor diodes Fabrication lab Anechoic chamber

20. Schedule RF Labs Jan 1 Get Married Jan 8 Honeymoon Jan 22 - 30 Preliminary DesignFeb 26 FabricationMar 19 Analysis Apr 9 Presentation & Final Report May 3

21. Questions?