Design of Compact UWB Slotted Hexagonal Monopole Antenna with 3.5/5.5 GHz Dual Band Rejection

Authors Surajit Mukherjee1, Avisankar Roy1, Sunandan Bhunia2

1Haldia Institute of Technology, Haldia, Purba Medinipur, West Bengal, India

2Central Institute of Technology, Kokrajhar, Assam, India

Issue Volume 13, Year 2021, Number 3
Dates Received 21 March 2021; revised manuscript received 15 June 2021; published online 25 June 2021
Citation Surajit Mukherjee, Avisankar Roy, Sunandan Bhunia, J. Nano- Electron. Phys. 13 No 3, 03026 (2021)
PACS Number(s) 84.40.Ba
Keywords UWB (7) , Dual band notched, Compact.

A design of compact ultra-wideband (UWB) monopole antenna with dual band-notched characteristics has been reported in this article. The band-notch effect is extremely important for any UWB system to avoid interference with existing narrowband applications such as WiMAX and WLAN. A hexagonal-shaped radiating element has been considered in this design. Two unequal U-shaped slots on the radiating patch have been implemented to achieve dual band-notched filter characteristics. An inverted U-shaped slot has been etched out on the hexagonal patch to achieve band-notch attributes for WiMAX (3.2-3.8 GHz) band. Another slot of having a U-shape has also been engraved on the patch to attain a notched band for WLAN (5.1-5.8 GHz) band. The proposed antenna having a total dimension of 38× 56 mm2. Arlon AD300 has been chosen as the substrate which has dielectric permittivity εr = 3. The height of the substrate is h = 1.524 mm. Full-wave electromagnetic simulation software Ansys HFSS has been used to analyze the radiation characteristics of the structure. The proposed antenna successfully covers the FCC allocated UWB frequency spectrum by operating over the frequency band between 2.6 GHz to 11.4 GHz (VSWR < 2) which depicts the bandwidth of 120 %. The designed antenna exhibits good gain and bidirectional radiation patterns.

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