Abstract
A compact dual-square-ring-shaped slot antenna using a microstrip feed line is proposed for wideband circularly polarized (CP) radiation. The antenna consists of a combined dual-square-ring-shaped slot along the diagonal direction and a microstrip feed-line along with stub in the orthogonal direction. The slot and feeding structures are fabricated on the opposite planes of a low cost FR4 substrate. The stub width and a dual-square-ring-shaped slot are optimized for wideband CP radiation with good impedance matching. The measured 3-dB axial ratio and 10-dB return loss bandwidths of the proposed antenna are 47% (2.1-3.4 GHz) and 75% (1.92-4.25 GHz), respectively. The measured gain is more than 2.0 dBic over the 3-dB axial ratio bandwidth.
Original language | English |
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Pages (from-to) | 2645-2649 |
Number of pages | 5 |
Journal | Microwave and Optical Technology Letters |
Volume | 56 |
Issue number | 11 |
DOIs | |
Publication status | Published - Nov 2014 |
Externally published | Yes |
Keywords
- circular polarization
- circularly polarized antenna
- microstrip feed-line
- slot
- slot antenna
- wideband