Broadband dual-polarized aperture-coupled patch antennas withmodified H-shaped coupling slots |
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Authors: | Kin-Lu Wong Hao-Chun Tung Tzung-Wern Chiou |
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Affiliation: | Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung; |
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Abstract: | This paper presents a new design of aperture-coupled patch antennas with modified H-shaped coupling slots for achieving dual-polarization radiation with high isolation over a wide bandwidth. By using the proposed coupling slots, whose two upper side arms are bent inward with a proper angle, the isolation between the two feeding ports of the patch antenna can. greatly be improved, compared to the case with conventional H-shaped coupling slots. Also, when using a pair of modified H-shaped coupling slots for each feeding port, the isolation can further be improved; a high degree of isolation (< -34 dB) over the entire impedance bandwidth greater than 15% and good cross-polarization level (> 20 dB) for the two polarizations can be achieved. Details of the proposed design and experimental results are presented and discussed |
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