A Novel Simple and Compact Microstrip-Fed Circularly Polarized Wide Slot Antenna With Wide Axial Ratio Bandwidth for C-Band Applications

作者：Ellis, Mubarak Sani^*; Zhao, Zhiqin^*; Wu, Jiangniu; Ding, Xiaoxiang; Nie, Zaiping; Liu, Qing-Huo^*

来源：IEEE Transactions on Antennas and Propagation, 2016, 64(4): 1552-1555.

DOI：10.1109/TAP.2016.2526076

• Axial ratio
• circularly polarized (CP)
• slot antenna

This communication presents a design of a new compact circularly polarized (CP) slot antenna fed by a microstrip feedline. The 3-dB axial ratio band can be achieved by simply protruding a horizontal stub from the ground plane toward the center of the wide slot (WS) and then feeding the WS with a microstrip feedline positioned to the side of the WS, underneath the protruded stub. The feedline and metallic stub are perpendicular to each other, and they resemble a T shape when viewed from the top. The proposed antenna is fabricated with an area of 25 x 25 mm(2). Measurement results show that the antenna attains an S-11 <= -10 dB impedance matching bandwidth of 90.2%, from 3.5 to 9.25 GHz, and a broadband 3 dB-AR bandwidth of 40%, ranging from 4.6 to 6.9 GHz. A peak gain of 0.8-4.5 dBi is achieved within the AR band. The proposed antenna is suitable for circular polarization applications in C band.

• 出版日期2016-4
• 单位电子科技大学