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Saltenna LLC surface wave antenna technology: Transmission through ultimate obscuration – a Faraday cage
Battery-operated 2.45-GHz transmitting antenna (l=12 cm) capable of sending video signals from inside a locked 90-dB isolation Faraday cage
May be used in 5G applications and for broadband radio transmission through:
Communication underwater using surface waves
What Are We Trying To Do? Communicate/image underwater and through sea surface
How Is It Done Today? Ultrasound and visible frequencies are used
What is New in Your Approach? Use surface electromagnetic waves for communication and imaging underwater.
Using surface wave antennas, we achieve broadband RF communications between underwater assets over distances. We propose to breach the seawater barrier for UAV to UUV communication, since the surface wave is present both above and below the seawater surface.
If you can communicate, you can image underwater
Laboratory testing: 2.45 GHz transmission through seawater
skin depth at 2.45 GHz is 3 mm
Surface wave RF technology works when laser communication fails!
Field testing at NSWC Panama City
Testing of Saltenna LLC underwater antennas at the NSWC Panama City facilities (water salinity 2.8-3.2%)
Testing results confirm our model
Compact design of a 2MHz SEW antenna
Based on estimates for a flat seawater surface from K. A. Michalski and J. R. Mosig, “The Sommerfeld half-space problem revisited: From radio frequencies and Zenneck waves to visible light and Fano modes,” J. Electromagn. Waves Appl., vol. 30, pp. 1–42, 2016.