A proposed three-layered patch antenna array combined with Uniplanar Compact Photonic Bandgap structures (UC-PBG) is presented to avoid non-desired radiations from the feeding structure and to mitigate the surface propagation modes, increasing the radiation efficiency, and reducing the parasitic lobes. The array is fed by electromagnetic proximity, implemented by a stripline network below the radiators. The array is designed to operate at of 10 GHz and is surrounded by UC-PBG structures. This configuration also helps to increase the bandwidth by keeping the electric field and the surface current stable around the radiators, reducing the variations of the impedance on a wider bandwidth. Also, the UC-PBG structures attenuate the surface propagation modes, lowering the parasitic lobes by almost 7 dB and reaching measured radiation efficiency higher than 80%. The patch array gets an operational bandwidth of 2.5 GHz, with a measured gain of 24 dB. The fractional bandwidth is 25%.

中文翻译：

---

通过在 X 波段使用光子带隙结构提高贴片天线阵列的性能

提出了一种与单平面紧凑光子带隙结构 (UC-PBG) 相结合的三层贴片天线阵列，以避免来自馈电结构的非期望辐射并减轻表面传播模式，提高辐射效率，并减少寄生瓣. 该阵列由电磁邻近馈电，由辐射器下方的带状线网络实现。该阵列设计为在 10 GHz 下运行，并被 UC-PBG 结构包围。这种配置还有助于通过保持辐射器周围的电场和表面电流稳定来增加带宽，减少更宽带宽上的阻抗变化。此外，UC-PBG 结构衰减了表面传播模式，将寄生瓣降低近 7 dB，并达到高于 80% 的测量辐射效率。贴片阵列的工作带宽为 2.5 GHz，实测增益为 24 dB。部分带宽为 25%。