Semi-Elliptical Slotted UWB MIMO Antenna with Multiple Notch Characteristics and High Isolation

Wireless communication continues to evolve rapidly, with ongoing advancements in technology, increased data rates, and improved coverage. In this article, a novel compact Semi-Elliptical shaped Slotted (SES) ultra-wideband (UWB) Multiple-Input Multiple-Output (MIMO) antenna with the size of 15 x 30 mm $^{2}$ is designed using HFSS software. Two slots were incorporated on the patch elements to generate the notch bands at X-band and Ku-band. A slotted parasitic strip engraved on the Partial Ground Plane (PGP) to generate the third notch at Ka-band and to enhance the isolation. The proposed design achieved the operating bandwidth of 38.15 GHz with triple notch characteristics. It also achieved the reflection coefficient (S
11
) of -28.26 dB at 17.28 GHz frequency and isolation of $\le -17$ dB for the entire ultra wideband. It also achieved the gain of 8.45 dBi with good radiation pattern.