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

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

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

Diversity  Time  Space  Frequency  Polarization

Project objectives  Design  Simulation  Manufacture  Analysis

Single port frequency diverse device

Dual port polarization diverse device

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

Microstrip construction

Microstrip antennas

Coplanar waveguide construction

Radiation characteristics

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

Antenna with switchable polarization

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

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

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

Equipment List PIN diodes Varactor diodes Fabrication lab Anechoic chamber

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

Questions?