Low-Cost Radar Jonathan Hoole University of Stellenbosch Prof. K.D. Palmer.

Low-Cost Radar

Jonathan Hoole

University of Stellenbosch

Prof. K.D. Palmer

Slide 2 © CSIR 2006 www.csir.co.za

Overview

• Aim• Basics of FM-CW Radar• Simulations – Multiple Targets• Proof of Concept• Results – System 1• Results – System 2• Conclusion

Slide 3 © CSIR 2006 www.csir.co.za

Aim

• Reduce Cost of Radar• Linear FM-CW[1,2]

• DDS• Multi-purpose[3]

[1] Skolnik, M.I.: Introduction to RADAR systems. 3rd edn. Mc Graw-hill,2001.

[2] Stove, A.: Linear FMCW Radar Techniques. IEE Proceedings, 1992.[3] Ellerbruch, D.A. Belsher, D.R.: Electromagnetic Technique of MeasuringCoal Layer Thickness. IEEE Transactions on Goescience Electronics,1978.

Slide 4 © CSIR 2006 www.csir.co.za

FM-CW Theory

• Advantages• Good RF bandwidth• Low Sampling Rate• Easy to Implement (DDS)• Data Easily Processed• Peak v Ave. Power

• Disadvantages• Sensitive to LO noise• Antenna Coupling

DDS ADC

LO RF

IF

cos(R)cos(T) = cos(R+T) + cos(R-T)

Slide 5 © CSIR 2006 www.csir.co.za

Simulation Results

Slide 6 © CSIR 2006 www.csir.co.za

Simulation Results

Slide 7 © CSIR 2006 www.csir.co.za

Proof of Concept

Slide 8 © CSIR 2006 www.csir.co.za

Proof of Concept Results

Slide 9 © CSIR 2006 www.csir.co.za

Ground Penetrating Radar

Slide 10 © CSIR 2006 www.csir.co.za

Ground Penetrating Radar Results

Slide 11 © CSIR 2006 www.csir.co.za

C-Band

Slide 12 © CSIR 2006 www.csir.co.za

C-Band Results – Biggest target at 10m, 20m and 30m

Slide 13 © CSIR 2006 www.csir.co.za

C-Band Results – Targets at 10m

Slide 14 © CSIR 2006 www.csir.co.za

C-Band Results – Targets at 20m

Slide 15 © CSIR 2006 www.csir.co.za

C-Band Results – Targets at 30m

Slide 16 © CSIR 2006 www.csir.co.za

Conclusion

• Cheap FM-CW Radar using DDS

• Successful• Two systems shown to work• R 11 500

• Possible improvements• PCB layout with FPGA• LO

Slide 17 © CSIR 2006 www.csir.co.za

Thank you for your attention!

• Any Questions?