【摘要】 为提升自动驾驶和高级驾驶辅助系统的精度与安全性，同时增强雷达系统的多功能性、环境适应性和抗干扰能力，提出一款应用于E波段且可实现频率连续调谐的新型贴片天线。该天线基于微带线馈电原理设计，通过添加寄生贴片来引入新的谐振频点，从而获得双频性能。此外，在贴片内加载十二边形缝隙以展宽带宽。在寄生贴片下方，集成了MEMS静电梳齿驱动器，当施加一定的偏置电压后，梳齿驱动器能够驱动寄生贴片产生一定行程的位移，天线的辐射频率随着寄生贴片的位移同步发生各种调制，从而实现频率的连续调谐。使用有限元软件HFSS及ANSYS分别对所设计的天线性能进行仿真。HFSS仿真结果显示，该天线的静态工作频率为79.8 GHz和88.9 GHz，回波损耗低于-20 dB，阻抗带宽达到5.0 GHz，主瓣增益为3.2 dBi，这表明其在E波段具有高辐射效率。ANSYS仿真结果表明，在52 V偏置电压下，寄生贴片可移动40μm，两个谐振点的频率调谐范围分别为2.1 GHz和3.1 GHz，且方向图保持良好。综上所述，这项工为E波段车载雷达系统提供了一种具备双频带、频率可调谐的贴片天线，该天线具有辐射效率高、带宽宽、频率调谐范围宽，以及小型化等优点。更多还原

【Abstract】 In order to improve the accuracy and safety of autonomous driving and advanced driving assistance systems, as well as enhance the multifunctionality, environmental adaptability, and anti-interference ability of radar systems, a new type of patch antenna that can be applied to the E-band and achieve continuous frequency tuning is proposed. The antenna is designed based on the principle of microstrip line feeding, introducing new resonant frequencies by adding parasitic patches to achieve dual frequency performance. In addition, a dodecagonal gap is loaded inside the patch to expand the width. Underneath the parasitic patch, a MEMS electrostatic comb driver is integrated. When a certain bias voltage is applied, the comb driver can drive the parasitic patch to produce a certain displacement, thereby the antenna’s radiating frequency undergoes various modulations in synchronisation with the displacement of the parasitic patch, resulting in continuous frequency tuning. The antenna performance is simulated using finite element softwares HFSS and ANSYS, respectively. The HFSS simulation results show that the static operating frequencies of the antenna are 79.8 GHz and 88.9 GHz, the return loss is less than-20 dB, the impedance bandwidth reaches 5.0 GHz, and the main lobe gain is 3.2 dBi, indicating that it has high radiation efficiency in the E-band. The ANSYS simulation results show that under a bias voltage of 52 V, the parasitic patch can move by 40 μm, and the frequency tuning ranges of the two resonance points are 2.1 GHz and 3.1 GHz, respectively, with good directional patterns maintained. In summary, this work provides a dual band, frequency tunable patch antenna for E-band vehicle mounted radar systems, which has the advantages of high radiation efficiency, wide bandwidth, wide frequency tuning range, and miniaturization.更多还原