What is a Metasurface antenna?
What are Metasurfaces? Metasurfaces are thin (2D) metamaterials engineered to manipulate the dispersion properties of surface-waves (SWs) or the reflection/refraction properties of space waves [1]. Indeed, in comparison with metamaterials, metasurfaces are low-profile, less-lossy and easier to fabricate.
What is conventional antenna?
The conventional antenna has designed for same dimensions as metamaterial loaded U-shaped patch antenna. Both antennas are fed by using co-planar waveguide (CPW) method. Simulation results for return loss and radiation pattern of both proposed and conventional antenna are shown and compared with practical results.
What is the difference between Metasurface and metamaterial?
Metasurfaces are thin-films composed of individual elements that have initially been developed to overcome the obstacles that metamaterials are confronted with. In contrast, active metasurfaces allow the dynamic control of its optical properties under external stimuli.
What is chiral metamaterial?
Chiral metamaterial is a new class of metamaterials offering a simpler route to negative refraction. Strong chiral behaviors such as optical activity and circular dichroism are observed and negative refraction is obtained for circularly polarized waves in these chiral metamaterials.
Why Aluminium is used in antenna?
Aluminum is the key material in most antennas. It’s a great combination of the factors you need for an antenna. I went into deep detail in this article, but here’s the short version It is more conductive than steel, more corrosion-resistant than copper, and cheaper than gold.
Is copper good for antennas?
With copper being twice as conductive as aluminum and 6 times more conductive than steel, it makes an excellent choice as an antenna material. The increased electrical efficiency means more of your RF energy will go up and out the antenna and not be trapped, creating heat energy.