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Bandwidth Enhancement of Small Slot Antenna with a Variable Band-Stop Function

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Abstract

In this paper, a novel and compact design of microstrip slot antenna with band-notched characteristic for UWB application is proposed. In the proposed design, an inverted T-shaped slot at the square radiating stub is used to create an additional resonance at the higher frequencies. By obtaining this resonance, the usable upper frequency of the antenna is extended from 10.3 to 17.6 GHz which provides more than 140 % fractional bandwidth. Additionally, by cutting a pair of step-shaped slits in the ground plane, a desired frequency band-stop performance has been obtained. Experimental results obtained for this antenna show that it exhibits good gain and radiation pattern characteristics within the UWB frequency range. The proposed antenna can operate from 2.9 to 17.1 GHz for VSWR <2 with a rejection band around of 5–6 GHz to suppress any interference from wireless local area network systems. Simulated and measured results are presented to validate the usefulness of the proposed antenna structure for UWB applications.

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Acknowledgments

The authors are thankful to Microwave Technology (MWT) Company staff for their beneficial and professional help (www.microwave-technology.com).

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Authors and Affiliations

  1. Electrical Engineering Department, Shahid Sattari Aeronautical University of Science and Technology, Tehran, Iran

    Jalil Mazloum

  2. Young Researchers and Elite Club, Ardabil Branch, Islamic Azad University, Ardabil, Iran

    Naser Ojaroudi Parchin

  3. Young Researchers and Elite Club, Germi Branch, Islamic Azad University, Germi, Iran

    Sajjad Ojaroudi

Authors
  1. Jalil Mazloum
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  2. Naser Ojaroudi Parchin
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  3. Sajjad Ojaroudi
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Corresponding author

Correspondence to Naser Ojaroudi Parchin.

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Mazloum, J., Ojaroudi Parchin, N. & Ojaroudi, S. Bandwidth Enhancement of Small Slot Antenna with a Variable Band-Stop Function. Wireless Pers Commun 95, 1147–1158 (2017). https://doi.org/10.1007/s11277-016-3820-9

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  • DOI: https://doi.org/10.1007/s11277-016-3820-9

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