Analysis of a microstrip antenna with an incomplete ground plane structure that can be used in electronic defense systems

In this paper, a small dual-port antenna with ultra-wideband application for electronic warfare applications is introduced. This antenna is of the monopole type and has U-shaped sections on the patch and an incomplete ground plane that controls the radiation between the two ports using a stop band to provide impedance matching over a wider bandwidth (from 4 to 12.1 GHz). to be This UWB monopole antenna is reconstructed horizontally with less than a quarter-wavelength spacing at 4 GHz to create a UWB multiple input and output (MIMO) antenna with dimensions of 25 x 38 x 1.6 mm3. In the UWB MIMO antenna, the antenna performance is improved by placing a rectangular patch with a U-shaped slot and variations in the ground surface. The modified ground plate also acts as an isolation structure, providing isolation below 21 dB at the operating frequency of 13.5-5 GHz. Also, the simulation in HFSS simulation software is designed in opposite way.