Array antennas and methods for improving their circular polarization performance

• Main Authors: TIAN CHUNSHENG, KE TENGLONG, SHI BINGYUN
• Format: Patent
• Language: Chinese; English
• Published: 21.12.2018
• Subjects: ANTENNAS, i.e. RADIO AERIALS; BASIC ELECTRIC ELEMENTS; ELECTRICITY

The invention discloses an array antenna and a method for improving the circular polarization performance thereof, the array antenna comprises a first unit, a second unit, a third unit and a fourth unit distributed in a rectangular array, wherein the first unit, the second unit, The third unit and the fourth unit have the same structure, and the first unit, the second unit, the third unit and thefourth unit are provided with feeding striplines, wherein the second unit is deflected by 90 degrees with respect to the first unit, the third unit is deflected by 180 degrees with respect to the first unit, and the fourth unit is deflected by 270 degrees with respect to the first unit. By changing the structure of the array antenna unit and then rotating the antenna element regularly, the instantaneous components of the instantaneous electric field vector of the array antenna element on the x-axis and y-axis in the two-dimensional coordinate system are nearly equal, so that the circularly polarized trajectory of the