Observing a mm-Wave Metamaterial Lens from the Perspectives of Near-to-Far Field and CATR

As 5G mobile services keep pursuing higher speeds of data transmission based on the use of mm- Waves, they run across problems. The strength of the mm-Wave signal becomes weak very rapidly as the receiver moves away from the transmitter. To overcome the shortcoming, the antenna takes the form of an array of a large size and is fed by amplifiers along the branches of the power divider. It ends up with growth in size and cost. Metamaterials such as transmitarrays have been proposed to increase the antenna gain avoiding the conventional feed circuitry. A metasurface can play a role of the planar lens which is positioned over the primary source. It leads to enhanced antenna gain and reduction in cost and loss. The antenna performances of the metasurface working for 5G and 6G wireless communication are characterized by measuring the radiated field patterns based on the near-to-far field test method and compact range chamber setup (CATR). The measurements present the results of the two methods are in good agreement and the gain improvement.