An Impulse GPR Application

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An Impulse GPR Application

• By Guma Kahimbaara

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User Requirements

• Model a GPR The GeoMole BHR
• Simulate and Test BHR in SystemView
• Apply Signal Processing to Echo
• Compare performance against SFCW GPR

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GeoMole BHR Operation Model
Semi-MONOSTATIC DEPLOYMENT
ASSYM. LOADED DIPOLE ANTENNA PROBE
TRANSMITTER
Transmitter inside
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GeoMole BHR Transmitter
Antenna
100 MHz LPF
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GeoMole BHR Transmitter Antenna
100 Wu-King Resistive Loading
Copper Pipe housing Transmitter
Transmitter Antenna
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Lossy Propagation Medium - Norite
Black Body Radiation 300K
Gain and Phase Custom Filter
Loss at Inter-media Boundary
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GeoMole BHR Receiver Antenna
Without Noise
With Noise bandpassed
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Receiver Amp Chain Optic Link
TN7111
MAR-6
MAR-6
RECEIVER AMP CHAIN
HFBR 2406
External Optic Link
Rx Patchcord
DAQ Patchcord
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Digital Acquisition Unit
Optional Attenuator
ADC
TN7101 SCU Amp
Clock
ADC input
ADC output
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Custom Filters
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Progress Report

• COMPLETED TASKS
• Modeling the GeoMole BHR
• Simulating the BHR in SystemView

• REMAINING TASKS
• Signal Processing
• Comparison against SFCW GPR
• Improvements to simulation model
• Stacking