Came across this interesting concept on an IET Journal here. Fluid antenna is a radical approach that advocates software-controlled position-flexible shape-flexible antenna. The concept liberates antennas to unleash massive diversity inherent in the small space of a mobile device and makes possible new opportunities that were previously unthinkable.
“ Be formless … shapeless like water … now you put water into a cup, it becomes the cup … you put water into a bottle, it becomes the bottle … put it in a teapot, it becomes the teapot … water can flow … water can crash … be water, my friend .”
These were the lines written and recited by Bruce Lee, the arguably most influential martial artist of all time, in the TV series Longstreet back in 1971. This philosophy has inspired many martial artists and is at the heart of Jeet Kune Do, the martial arts system Lee founded in 1967. Some parallels can be drawn to applications beyond martial arts, such as wireless communications, which is what this article is about.
Fluid antenna may represent any antennas equipped with software-controllable fluidic structure, and which can alter their shape and position to reconfigure the polarisation, operating frequency, radiation pattern and other antenna performance metrics, and it may include designs involving no fluidic materials if they can mimic the agility. Fig. 1 illustrates the concept of a possible realisation on a handset where conductive fluid is installed on a tube-like structure within which the fluid is free to move. In this design example, the shape of the antenna cannot be changed but its position can, which may be exploited for diversity and capacity benefits.
To learn more about this, go to the IET journal here. The PDF is available here.
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