Could I please get some advise and suggestions on the gain of metamaterial enabled antenna? would gain of -3 dBi works for wearable antenna?
Here is a literature https://web.archive.org/web/20060906103800/http://ceta.mit.edu/pier/pier51/17.0407071.Wu.WPCGK.pdf
It means using a metamaterial in a way similar to how you would use a lens to spread the signal across an aperture and to get the right phase distribution to get the gain you want. Metamaterials were used in the second world war to make microwave lenses.
-3dBi is not too bad on the body, for a small antenna. A big problem is getting a low profile small antenna that doesn't lose a lot of its power to the body, so although 5 dBi from a microstrip patch atenna is easy, to get this it would need some ground around it to stop it losing power into the body.
Metamaterials have the ability to control and steer wavefronts, helps to focus evanescent waves beyond the diffraction limit, thus coupling and directing more power in the desired port, hence gain enhancer! that too with a smaller dimension as compared to normal patch
These are antennas that uses meta material to increase the performance of miniaturized antenna systems. Antenna designs incorporating metamaterials can step-up the antenna's radiated power.
It depends on the type of materials you want to use either dielectric,insulating or metallic materials with their respective geometry and structures.For instance, for photonic and plasmonic device modelling, Silver and Gold are good candidates for these applications not leaving out Al and Cu because of their striking features such as damping frequency,plasma frequency and so on.
If you could give further details where you want to apply it to, I can guide you further in this regard.
Hope it helps
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