Slot-coupled microstrip antenna for broadband circular polarisation |
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Authors: | Su C-W Row J-S |
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Affiliation: | Dept. of Comput. & Commun. Eng., Chienkuo Technol. Univ., Chang-Hua, Taiwan; |
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Abstract: | A microstrip antenna with broadband circular polarisation (CP) is presented. The proposed microstrip antenna has a circular patch and is excited by a series microstrip-line-feed configuration through the coupling of a ring slot in the ground plane. The broadband operation is achieved by coupling two CP resonant elements, which are due to the circular patch and the ring slot, respectively. A typical prototype using foam material of thickness 5 mm as the antenna substrate is constructed. Measured results show the 3 dB-axial-ratio bandwidth centred at 2500 MHz is more than 10%. |
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