A single-FED slot-aperture hybrid antenna for broadband circular polarization operations

作者：Lu Yu Chun; Yu Ming Je; Lin Yi Cheng^*

来源：Microwave and Optical Technology Letters, 2012, 54(2): 412-415.

DOI：10.1002/mop.26569

• wideband
• circular polarization
• slot antenna
• aperture antenna
• single-fed

This article presents a microstrip-fed slot-aperture hybrid antenna for wideband circularly polarized (CP) operations. The antenna consists of a U-shaped slot, a rectangular aperture, and a probing strip fed by a microstrip line. In general, the U-shaped slot and the rectangular aperture resonate at two separate frequencies. When properly arranged, the proposed antenna may resonate over a single wideband of CP radiation. The 3-dB axial ratio (AR) bandwidth of the presented antenna in free space is about 27% with the gain level about 34 dBic. When a planar reflector is incorporated for the desirable unidirectional pattern, the presented antenna has an enhanced gain about 7 dBic with a 3-dB AR bandwidth of 25% and a front-to-back ratio of about 14 dB. Good agreement between measured and simulated results was achieved.

• 出版日期2012-2