A low-cost millimeter-wave circularly polarized (CP) planar integrated magneto-electric dipole (ME-dipole) element with simple structure is proposed, which is fed by a low-profile feeding structure capable of being directly integrated with Ka-band front-end circuits. Two rotationally symmetrical L-shaped patches are adopted to replace the two straight arms of the original linearly polarized ME-dipole to generate a rotated electric field, thus radiating CP waves. Based on this CP ME-dipole element, CP array antennas containing 2 × 2 and 4 × 4 radiators with low-profile full-corporate feeding networks are developed without any additional dielectric layer. Prototypes of these two CP array antennas are fabricated and measured. Good agreement between the simulated and measured results is achieved, validating the correctness of these two designs. The 2 × 2 array exhibits a |S11| < −10 dB relative bandwidth of 34.67%, a 3 dB axial-ratio bandwidth of 11.33%, and a maximum gain of 13.12 dBic, while the corresponding performance of the 4 × 4 array is 21.83%, 5.9%, and 18.28 dBic, respectively. Thus, they can be good candidates for applications, for example, 5G millimeter-wave communications, Ka-band satellite communications, etc.

中文翻译：

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低成本毫米波圆极化平面集成磁电偶极子及其具有低剖面馈电结构的阵列

提出了一种结构简单的低成本毫米波圆极化（CP）平面集成磁电偶极（ME-dipole）元件，该元件由能够直接与Ka波段前沿集成的低剖面馈电结构馈电-端电路。采用两个旋转对称的L形贴片代替原来线极化ME偶极子的两个直臂产生旋转电场，从而辐射CP波。基于这种 CP ME 偶极子元件，开发了包含 2 × 2 和 4 × 4 辐射器的 CP 阵列天线，具有低剖面全公司馈电网络，无需任何额外的介电层。制造并测量了这两个 CP 阵列天线的原型。仿真结果和测量结果之间取得了良好的一致性，验证了这两种设计的正确性。2 × 2 阵列表现出 |S11| < -10 dB 相对带宽为 34.67%，3 dB 轴向比带宽为 11.33%，最大增益为 13.12 dBic，而 4 × 4 阵列的相应性能为 21.83%、5.9% 和 18.28 dBic，分别。因此，它们可以成为应用的良好候选者，例如 5G 毫米波通信、Ka 波段卫星通信等。