Title :
X-Band Phase-Gradient Metasurface for High-Gain Lens Antenna Application
Author :
Haipeng Li ; Guangming Wang ; He-Xiu Xu ; Tong Cai ; Jiangang Liang
Author_Institution :
Air & Missile Defense Coll., Air force Eng. Univ., Xi´an, China
Abstract :
We propose a high-gain transmitting lens antenna by employing layered phase-gradient metasurface (MS). The MS is engineered to focus the propagating plane wave to a point with high efficiency. An X-band patch antenna is placed at the focal point of the MS as a feed source, and then the quasi-spherical wave emitted by the source is transformed to plane wave. Due to the successful conversion of quasi-spherical wave to plane wave, the beam width of the patch antenna has been decreased 66° and the gain has been enhanced 11.6 dB. The proposed lens antenna not only opens up a new route for the applications of phase-gradient MS in microwave band, but also affords an alternative for high-gain antenna.
Keywords :
antenna feeds; electromagnetic wave propagation; lens antennas; microstrip antennas; transmitting antennas; X band patch antenna; X band phase gradient metasurface; beam width; feed source; focal point; gain 11.6 dB; high-gain transmitting lens antenna; layered phase gradient metasurface; microwave band; phase-gradient MS; propagating plane wave; quasispherical wave; Antenna measurements; Antenna radiation patterns; Focusing; Lenses; Patch antennas; Transmitting antennas; Focusing; focusing; high gain; lens antenna; phase-gradient metasurface; phase-gradient metasurface (MS); plane wave; quasi-spherical wave;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2015.2475628
