Design of Modified Hexagonal UWB Slot Antenna with Dual Band Notched Characteristics

摘要

. By inserting symmetrical L-form parasitic ends at the upper edge at the modified hexagonal slot and C-shape parasitic stubs at the both arms of the patch to obtain the desired stop band characteristics for WiMAX and WLAN respectively. The designed antenna is operate in between 3.02~ 15GHz with a dual stop band from 3.15~4.06GHz (for Worldwide Interoperability for Microwave Access) and 5.13~6.2GHz (for Wireless Local Area Network). To mitigate the possible interference in between UWB and these narrow bands (Worldwide Interoperability for Microwave Access and Wireless Local Area Networkbands) will help. The designed antenna is made-up on a FR-4 glass epoxy substrate having dielectric constant of 4.4. Parametric studies have been conducted by changing length L2 (symmetrical L-shape stubs) and L3(C-shape stubs) and it is directedwith the help of FEKO-EM simulation software. Performance of this antenna studied in terms of VSWR, efficiency, radiation pattern, time domain analysis. Forthe total ultra-wideband excluding for Worldwide Interoperability for Microwave Access and Wireless Local Area Network frequency, Proposed antenna shows efficiency more than 75%.