Dual Circularly-Polarized Spidron Fractal Slot Antenna

作者：Thanh Nguyen Trung; Yang Youngoo; Lee Kang Yoon; Hwang Keum Cheol

来源：Electromagnetics, 2017, 37(1): 40-48.

DOI：10.1080/02726343.2017.1261267

• Coplanar waveguide
• dual circular polarization
• shared-aperture
• slot antenna
• Spidron fractal

A shared-aperture dual circularly-polarized Spidron fractal slot antenna is presented. The proposed antenna, which includes a Spidron fractal slot with an L-shaped slit and a cutting corner, is fed by two individual excitation ports. The left-handed circular polarization (LHCP) and right-handed circular polarization (RHCP) at the same operating frequency band are simultaneously achieved using the even and odd modes in a coplanar waveguide transmission line. The measured -10 dB reflection and 3 dB axial ratio (AR) bandwidths are 20.24% and 8.0% for LHCP and 10.09% and 9.15% for RHCP. An average isolation of about -19.84 dB is obtained between the two ports within the overlapped bandwidth (-10 dB reflection and 3 dB AR bandwidths). The measured peak gains of the proposed antenna for LHCP and RHCP are 5.41 dBic and 3.39 dBic, respectively.

• 出版日期2017