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Single-feed circularly polarized equilateral-triangular microstrip antenna with a tuning stub

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2 Author(s)
Jui-Han Lu ; Dept. of Electron. Commun. Eng., Nat. Kaohsiung Inst. of Marine Technol., Taiwan ; Kin-Lu Wong

Novel circular polarization (CP) designs of single-feed equilateral-triangular microstrip antennas are proposed and experimentally studied. The proposed CP designs can easily be achieved by loading a narrow tuning stub at the triangle tip or at the center of the bottom edge of the triangular patch. Moreover, by embedding a cross-slot of equal slot lengths in the triangular patch, a compact CP operation can easily be obtained, with an antenna size reduction up to about 22%, as compared to the CP design of a regular triangular microstrip antenna without cross-slot at a fixed frequency

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Antennas and Propagation, IEEE Transactions on  (Volume:48 ,  Issue: 12 )