Harmonic Radar Transceiver making tracking small animals safe

Harmonic Radar Transceiver making tracking small animals safe and easy MDR 12/08/2006 Advisor Marinos Vouvakis Members Mikeoll Echeverria Maria Gomes Juan Lopez ECE Department SDP 07 1

Background What is the problem? Tracking some animals is hard but key in biology research Why is important? Important to understand animals’ behavior What has been done? Existing methods are problematic Normally big transmitters Battery powered Expensive Frequent technical failures ECE Department SDP 07 2

Solution What needs to be done? Tracking should avoid influencing animal behavior What are we doing? Tag Track tagged small animals, insects, birds Develop small & minimal complexity tags Develop a harmonic radar transceiver Tag (Passive reflector) Independent of energy source Small and light Inexpensive ECE Department SDP 07 3

Principle of Operation How are we doing it? ECE Department SDP 07 Tx F 0 Rx Rx F 0 2 F 0 4

Specs § Range 10 meters § Angle of resolution At most 30 degrees ECE Department SDP 07 5

System Design Tag Model Gdf Ed Gdh Diode Conversion efficiency: Ed = 0. 8% Friis Equation TAG ECE Department SDP 07 POWER SUBSYSTEM -Power Supply 15 W -Transformers 7 V, 9 V, 12 V 6

Arriving to Parameters Noise floor Operation point -74. 3 d. Bm Margin=30 d. B Transmitting Power 26 d. Bm = 0. 4 W Signal source VCO enough Rx Power min: At least -103 d. Bm (sensitivity) ECE Department SDP 07 7

Budget VCO $50 Directional Coupler $30 Bandpass Filter $0 Power Amplifier $170 ECE Department SDP 07 TX Antenna $0 Frequency Multiplier $48 RX Antenna $0 IF Amplifier $65 Low Noise Amplifier $65 Bandpass Filter $100 Lowpass Filter $37 Total $640 8

Tag Fabrication and Testing Fabrication • AWG#24 copper wire • Agilent HSCH-5340 beam lead Schottky diodes Test Procedure • Power reflection for several tags’ dimensions • Characterization of tags’ cross sectional area Picture of the Tag Test Results NOT COMPLETE ECE Department SDP 07 9

MDR Deliverables üTag built û Tag tested üFinalized block diagram topology üPerform system design simulations using MATLAB üDecision on signal source üDecision on frequency üCost Analysis and market research ECE Department SDP 07 10

Next Step • Borrow available components from Antennas and Propagation Lab, Microwave Remote Sensing Lab, Microwave Instructional Lab • Buy rest of the components • Start building the receiver ECE Department SDP 07 11

Project Timeline Tasks Feb Mar April May • Borrow available components from Labs • Purchase remaining Components • Start Building Transmitter • Start Testing Transmitter • Start Building Receiver • Start Testing Receiver • Integrate/Test Radar with Tag • Test Entire System ECE Department SDP 07 12

Final Deliverables • A working prototype of the harmonic transceiver (radar) and tag • Complete project documentation • • • The user manual Mathematical model System specifications Block diagram Schematics Simulations ECE Department SDP 07 13

The End Thank You! QUESTIONS? ECE Department SDP 07 14

Work Cited § Colpitts C, D. Luke, G. Boiteau, and M. Doyle, Harmonic Radar Identification Tag for Insect Tracking IEEE Canadian Conference on Electrical and Computer Engineering. § Colpitts, Bruce G. Harmonic Radar Transceiver Design: Miniature Tags for Insect Tracking Transactions on Antennas And Propagation Vol. 52, No. 11, (November 2004): 2825 -2832. § Pozar, David M. Microwave Engineering Willey 2005 ECE Department SDP 07 15