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In this article, a single band-notched ultra-wideband circular patch antenna is presented. A circular patch antenna with an ultra-wideband feature is achieved by using side reflectors and a deformed ground plane. The antenna is implemented on a low-loss substrate RO4003C with εr of 3.55 while the antenna design and simulations are done using CST software. The overall antenna size is 26 × 35 × 0.813 mm3. Band notching is acquired by applying inverted C-slots and stair-shape slots on the circular patch. Triangular shape slots are added to the deformed ground to enhance the impedance matching criteria. The antenna operates from 2.67 GHz to 11.64 GHz with a fractional bandwidth of 125% while rejecting lower WLAN frequencies (5.15–5.35 GHz) and upper WLAN frequencies (5.72–5.85 GHz) as well as other resonating frequencies occurring at (5.85–6.58 GHz). The gain, radiation pattern and return loss of the proposed antenna present a stable and promising result that allows the antenna to be adapted and used in many applications.

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A Compact Band-Notched Circular Patch Antenna for UWB Applications

  • 会议论文

  • 发表日期：

    2025年

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  • Heba EL-Halabi,
  • Ahmad Itani,
  • Malek Al Khatib,
  • Enas Al Ayash,
  • Manal K. Fattoum

摘要

In this article, a single band-notched ultra-wideband circular patch antenna is presented. A circular patch antenna with an ultra-wideband feature is achieved by using side reflectors and a deformed ground plane. The antenna is implemented on a low-loss substrate RO4003C with εr of 3.55 while the antenna design and simulations are done using CST software. The overall antenna size is 26 × 35 × 0.813 mm3. Band notching is acquired by applying inverted C-slots and stair-shape slots on the circular patch. Triangular shape slots are added to the deformed ground to enhance the impedance matching criteria. The antenna operates from 2.67 GHz to 11.64 GHz with a fractional bandwidth of 125% while rejecting lower WLAN frequencies (5.15–5.35 GHz) and upper WLAN frequencies (5.72–5.85 GHz) as well as other resonating frequencies occurring at (5.85–6.58 GHz). The gain, radiation pattern and return loss of the proposed antenna present a stable and promising result that allows the antenna to be adapted and used in many applications.