Double-Layer Transmitarray Antenna based on Coupled Rectangular Loops at 9.8 GHz.

Transmitarray is a high gain antenna suitable for various applications such as satellite communications, automotive radars, and future cellular communication systems. In order to attain a high gain, the diverging rays are focused by compensating the phase of the rays. The unit cell elements in the transmitarray are responsible for passing the electromagnetic energy appropriately to compensate for the phase excesses. A transmitarray antenna with 7×7 elements was designed and realized at a frequency of 9.8 GHz. The unit cell element consists of two coupled open rectangular resonator loops to sharpen the transmission stop region, broadening the phase range compared to a single open rectangular resonator loop. The fabrication process uses the Rogers Duroid 4003C substrate. A gap of 4 mm separates the substrate layers. The antenna has a gain of 18.5 dBi and an aperture efficiency of 31.7%. [ABSTRACT FROM AUTHOR]