In this paper, a new compact design of frequency reconfigurable slot antenna is presented. The proposed radiating patch consists of two symmetrical D shape slots and incorporates four PIN diodes with two stubs which cover a small dimension area of 8.6 × 6.0 × 1.6 mm³. The ground plane is modified by etching two parallel rectangular slots to enhance the bandwidth and design parameter of the antenna. RF pin diodes are used as a switching mode in the slotted D section of the patch which affects the electrical length of the slot antenna, therefore switchable frequency response is obtained. The antenna produces four dual-band states and twelve triple-band states among the sixteen states of diode configuration. The designed antenna resonates at six different resonating frequencies such as 17.4 GHz, 17.5 GHz, 18.9 GHz, 19.0 GHz, 24.9 GHz, and 25 GHz and covers the wide range of frequency from 17.2 to 25.5 GHz which makes it applicable to function at the Ku and K band applications. Simulation of an antenna is done by Ansys HFSS 17.0 software. The results of the simulation show that the antenna has achieved a stable radiation pattern with an appreciable gain of 10 dB, peak directivity 4.26 dBi, peak gain 5.66 dBi, and a maximum bandwidth of 1 GHz with 98% radiation efficiency at these operating frequency bands.

本文提出了一种新的紧凑型频率可重构缝隙天线设计。拟议的辐射贴片由两个对称的D形槽组成，并包含四个带两个短管的PIN二极管，它们覆盖了8.6×6.0×1.6 mm ³的小尺寸区域。通过蚀刻两个平行的矩形槽来修改接地平面，以增强天线的带宽和设计参数。RF贴片二极管在贴片的开槽D部分中用作切换模式，这会影响缝隙天线的电气长度，因此可获得可切换的频率响应。天线在二极管配置的十六个状态中产生四个双频带状态和十二个三频带状态。设计的天线在六个不同的谐振频率（例如17.4 GHz，17.5 GHz，18.9 GHz，19.0 GHz，24.9 GHz和25 GHz）谐振，并且覆盖了从17.2至25.5 GHz的广泛频率范围，从而使其可在Ku上正常工作。和K波段应用。天线的仿真由Ansys HFSS 17.0软件完成。