Radioengineering (Apr 2018)

Compact UWB Filtering-Antenna with Controllable WLAN Band Rejection Using Defected Microstrip Structure

  • A. Alhegazi,
  • Z. Zakaria,
  • N. A. Shairi,
  • A. Salleh,
  • S. Ahmed

Journal volume & issue
Vol. 27, no. 1
pp. 110 – 117

Abstract

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An ultra-wideband (UWB) filtering-antenna with controllable band notch is reported in this paper. The filtering-antenna consists of a modified monopole antenna and defected microstrip structure (DMS). The monopole antenna is modified using microstrip transition in the feedline and block with a triangular-shape slot on each side of the circular patch to produce wider impedance bandwidth with better return loss. The DMS is constructed using U-shaped slot etched on the feedline to provide band notch and remove WLAN band (5.1-5.8 GHz). A switch is employed in the DMS to control the created band notch. The measured results show that the proposed design exhibits a wide impedance bandwidth with controllable WLAN band rejection, realized peak gain of 4.85 dB and omnidirectional radiation pattern. Therefore, the proposed design is suitable for UWB applications.

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