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Improved RF Signal Propagation Through Water via Waveforms

Improved RF Signal Propagation Through Water via Waveforms. Ritesh J. Patel Electrical Engineering Justin Jantzen Aerospace Engineering Dr. Dharma Agrawal REU Mentor & Distinguished Professor Anagha Jamthe Graduate Student Mentor. Background.

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Improved RF Signal Propagation Through Water via Waveforms

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  1. Improved RF Signal Propagation Through Water via Waveforms Ritesh J. Patel Electrical Engineering Justin Jantzen Aerospace Engineering Dr. Dharma Agrawal REU Mentor & Distinguished Professor Anagha Jamthe Graduate Student Mentor Background Test Methods Outcome • Radio Frequency signals are commonly used in communications, from radio and cellphones to Wi-Fi • RF signals lose strength quickly in water due to absorption/attenuation properties • Wireless devices communicating with RF signals could be used in off-shore oil-drilling platforms, submarines, and marine life applications • Transmit signal through pipe (copper & PVC) and two plastic bags in air • Transmit signal through pipe (copper & PVC) and two plastic bags by placing pipe and plastic bags in water • Compare the RSSI percentage of copper, PVC and two plastic bags in air • Compare the RSSI percentage of copper, PVC and two plastic bags in water • Use different diameter (1.5 inch, 2 inch, & 3 inch) of pipes to see diameter’s effect on RSSI percentage Test Result Comparisons in Air Average RSSI, in Percentage of Maximum RSSI, where σ is Standard Deviation Experiment Purpose • Improvement in Radio Frequency signal propagation between a wireless transmitter/receiver pair through a pipe filled with air vs. RF signal propagation through water • A hollow pipe can be used to propagate signal through air rather than water and could significantly improve the signal quality and transmission range Average RSSI Lost, compared to Maximum RSSI Test Result Comparisons in Water Conclusion • Signals subject to large attenuation through water without waveform • Waveform reduces signal somewhat in air • In water, PVC waveform reduces signal loss by up to 10% • Submerged copper pipe subjects signal to complete loss at 1m • Larger pipe diameters have a small, but negative, effect on signal strength Materials • Copper & PVC pipes of varying diameters cut into 1m segments • Trash can filled with water • RF Sensors operating at 2.4 GHz

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