We presented a miniaturized patch antenna with enhanced bandwidth. Reactive Impedance Surface (RIS) was introduced instead of the traditional metal floor, and bandwidth enhancement is realized by loading slotted parasitic patches. The reference antenna and the antenna 1 loaded with the parasitic patch are designed, that impedance bandwidth changed from 8.5% to 23.6%, the peak gain and the front-to-back ratio was also improved by 2.2dBi and 7.8dB respectively; The metal floor of antenna 1 was instead by using RIS periodic structure to design Antenna 2. The absolute bandwidth of both antenna 1 and antenna 2 is about 1GHz. Antenna 2 is 22.4% smaller than the reference antenna and 28.6% smaller than antenna 1. The simulation results show that the proposed bandwidth enhancement and miniaturization methods are effective and ensure a certain improvement in gain.

我们提出了一种具有增强带宽的小型贴片天线。引入反应阻抗表面（RIS）代替传统的金属地板，并通过加载开槽寄生贴片实现带宽增强。设计了参考天线和加载寄生贴片的天线1，阻抗带宽从8.5%变为23.6%，峰值增益和前后比也分别提高了2.2dBi和7.8dB；天线1的金属底板改用RIS周期结构设计天线2。天线1和天线2的绝对带宽都在1GHz左右。天线 2 比参考天线小 22.4%，比天线 1 小 28.6%。