Inverted L-Shaped Slot-Based Monopole Antenna for Enhanced WiMAX Applications

Abstract

In this work, a monopole antenna with a unique tower-shaped radiating element integrated into the patch design is presented. The antenna is mounted on a conducting ground plane and engineered to operate efficiently across dual frequency bands, specifically tailored for WiMAX and ISM applications. The design incorporates an L-slit and a T-shaped structure within the monopole configuration, enabling enhanced performance and precise frequency isolation. The antenna achieves a simulated isolation factor of -22 dB, demonstrating excellent suppression of interference. It resonates at 3.3 GHz for WiMAX applications and at 5.8 GHz for ISM applications, meeting the requirements for reliable and efficient wireless communication. A comprehensive parametric study was conducted to thoroughly analyze and optimize the antenna's performance characteristics. This analysis ensures that the proposed design achieves superior impedance matching, radiation efficiency, and isolation, making it a robust solution for dual-band wireless systems.

Specification

Description:The intricate design of a textile antenna draws deep inspiration from the revered Swastik symbol. Crafted with meticulous detail, the antenna's blueprint was brought to life using Ansys High-Frequency Structure Simulator (HFSS) 19.0 software The proposed antenna is fabricated on an FR4 substrate with a thickness of 1.6 mm, a dielectric constant of 4.4, and dimensions defined by a length and width. To achieve circular polarization, an asymmetric ground plane is implemented, with dimensions and a 2 × 2 mm section removed. This modification introduces the desired polarization characteristics, enhancing the antenna's radiation performance.
To ensure effective isolation between the targeted frequency bands, L-shaped slots are strategically integrated on both sides of the antenna. These slots are specifically designed to suppress unwanted frequency components, optimizing isolation performance at distinct rates for different bands. Additionally, a T-shaped slot is introduced along the feed line of the antenna, significantly improving the reflection loss characteristics at the required frequencies. This configuration ensures that the antenna operates efficiently within the specified bands.

The dimensions of all slots and slits, including the L-shaped and T-shaped structures, are meticulously optimized to achieve the desired frequency bands and performance requirements. These modifications are crucial in tailoring the antenna's impedance matching and radiation characteristics.
A detailed summary of the antenna's physical parameters and dimensions is provided in the accompanying table for clarity and reproducibility
, Claims:1. Broadband Antenna for WiMAX and ISM Applications: A monopole antenna designed on an FR4 substrate, optimized to support WiMAX applications at 3.3 GHz with a reflection coefficient of -20 dB and ISM band applications at 5.8 GHz with a reflection coefficient of -19 dB, characterized by its compact structure, high efficiency, and a peak gain of 3.46 dB, ensuring reliable wireless communication in these frequency bands.
2. Multifunctional Antenna with Satellite Communication Capability: The proposed monopole antenna, in addition to supporting WiMAX and ISM bands, includes a resonance frequency at 7.65 GHz with a reflection coefficient of -40 dB, enabling its use for specialized applications such as stationary Earth satellite communication, thereby extending its utility beyond commercial wireless networks.
3. Integration of Slot-Based Design for Enhanced Isolation: A monopole antenna featuring integrated L-shaped and T-shaped slots, strategically positioned to suppress interference, enhance frequency band isolation, and improve reflection coefficient characteristics, ensuring optimal performance for targeted frequency bands while minimizing the impact of undesired resonances.
4. Compact High-Performance Antenna Design: An antenna fabricated on a 1.6 mm thick FR4 substrate with a dielectric constant of 4.4, utilizing an asymmetric ground plane and slot-based structures to achieve circular polarization, efficient frequency band operation, and consistent gain, providing a scalable solution for applications in WiMAX, ISM, and satellite communication systems..

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