A wide beamwidth rectangular dielectric resonator antenna (RDRA) working on dual modes is proposed in this letter. The radiator of the antenna with inside metallic posts and outside metallic walls is placed on a groundplane with a size of 2λ_g × 2λ_g. A TE′_δ21TE′_δ21 mode, which is similar to TE_δ21 mode, is generated by using the metallic posts inside the DR. By adjusting the height of metallic posts and the distance between the DRA and the metallic walls, the TE′_δ21 mode, and the TE_δ11 mode are superimposed with each other, widening the beamwidth of the RDRA to above 140° in both the E‐plane and H‐plane. This antenna works from 8.1 to 8.7 GHz with a relative bandwidth of 7.1%, which can be a good candidate in navigational systems.

中文翻译：

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具有宽波束宽度的混合双模介电共振器天线

在这封信中提出了一种在双模下工作的宽波束宽度矩形介电共振器天线（RDRA）。与内部金属芯柱和外金属壁的天线的辐射体放置在接地面的尺寸为2 λ_克 ×2 λ_克。甲TE ' _{δ 21} TE' _δ21模式，其类似于TE _{δ 21}模式，是通过使用DR内的金属芯柱生成的。通过调节金属芯柱的高度和DRA和金属壁之间的距离，TE ' _{δ 21}模式和TE _{δ 11}模式彼此叠加，在E平面和H平面上将RDRA的光束宽度扩大到140°以上。该天线的工作频率为8.1至8.7 GHz，相对带宽为7.1％，在导航系统中可能是一个很好的选择。