Sea Water Antenna
Researchers have developed a salt water antenna that can effectively control beamforming in the desired directions and has unique advantages over metal.
The ability to focus the energy of the radio signal on a specific receiver means increased range and transmission efficiency, but if its location is unclear, it is moving, or if it is necessary to switch to another object, then things become more complicated. In this case, engineers often use a beamforming technique that allows waveform phase and focus adjustments to be made without rotating the device..
A team of engineers from Nanjing University of Aeronautics and Astronautics presented an improved antenna based plastic and sea water. The structure consists of a circular grounded plane and thirteen clear acrylic tubes, which can be filled with seawater or completely emptied if necessary.
The central rod, through the copper disc at its base, sends signal 360 degrees, and the 12 cylinders surrounding it, when filled, act as reflectors, suppressing transmission in their direction. The antenna works in the range 334 MHz to 488 MHz.
The advantage of this technology over metal counterparts is that by adjusting the water level using micropumps, you can dynamically control the activation status. In addition, in the off state device cannot be detected by radar.
According to the developers, water-based antennas can simplify the construction of 5G networks, the Internet of things and be used in marine equipment.
We also previously reported on the development of a new converter data stream for 6G networks, which will provide transmission speeds of more than 100 Gbps
text: Ilya Bauer, photo: Lei Xing / NUAA