Abstract
A wideband decoupling method for dielectric patch (DP) antenna (DPA) is proposed in this paper. The air tunnel can not only incorporate TM10 and antiphase TM20 modes to expand the antenna bandwidth, but also make the port-to-port isolation (S21) flat in broadband. Furthermore, the two pairs of metal strips on the DPA help to achieve a balance between the mutual capacitive and inductive coupling, further improving wideband isolation. Meanwhile, it is worth noting that the radiation pattern can be stabilized during the decoupling process. Finally, the simulation result exhibits that the impedance bandwidth is 18.4% (4.97GHz-5.98GHz) and the in-band isolation is enhanced to more than 20dB.
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