A New Technique to Design Circularly Polarized Microstrip Antenna by Fractal Defected Ground Structure

作者：Wei, K.^*; Li, J. Y.; Wang, L.; Xu, R.; Xing, Z. J.

来源：IEEE Transactions on Antennas and Propagation, 2017, 65(7): 3721-3725.

DOI：10.1109/TAP.2017.2700226

• Circular polarization
• defected ground structure (DGS)
• fractal structure
• microstrip antenna

A new technique to design single-feed circularly polarized (CP) microstrip antenna is proposed. The CP radiation is obtained by adjusting the dimension of the etched fractal defected ground structure (FDGS) in the ground plane. Parameter studies of the FDGS are given to illustrate the way to achieve CP radiation. The CP microstrip antennas with the second and third iterative FDGS are fabricated and measured. The measured 10-dB return-loss bandwidth of the CP microstrip antenna is about 30 MHz (1.558 to 1.588 GHz), while its 3-dB axial-ratio bandwidth is 6 MHz (1.572 to 1.578 GHz). The gain across the CP band is between 1.7 and 2.2 dBic.

• 出版日期2017-7
• 单位西北工业大学