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Antenna Fundamentals for Legacy Mobile Applications and Beyond pp 53–70Cite as

Double-Monopole Crescent-Shaped Antennas with High Isolation for WLAN and WIMAX Applications

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Abstract

The mutual coupling between two closely spaced antennas and various techniques for its reduction are explained. Two configurations of a planar double antenna are proposed where one antenna is intended for WLAN and the other for WIMAX applications. Each antenna has the form of a crescent-shaped monopole. The lengths of the two radiating arcs are chosen for resonance at 2.45 GHz and 3.5 GHz to comply with the WLAN and WiMAX standards, respectively. The two monopoles have a small separation of 9 mm (0.0735 ;o at 2.45 GHz). A technique is proposed for reducing the mutual coupling between the two closely spaced antennas by etching a slot in each of the microstrip line feeding the two antennas. The slot length in each antenna is chosen such that it resonates at the operating frequency of the other antenna so that the frequency of the other antenna is notched out and lower coupling is achieved. Two configurations are investigated to obtain increased isolation between the two antennas. The simulations using CST Microwave Studio software show that the proposed methods can reduce the envelope correlation coefficient by 35-fold at the 2.45 GHz and 21-fold at the 3.5 GHz frequency bands.

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Author information

Authors and Affiliations

  1. College of Electronic Engineering Ninevah University, Mosul, Iraq

    Khalil H. Sayidmarie

  2. Institute of Technology, Mosul, Iraq

    Likaa S. Yahya

Authors
  1. Khalil H. Sayidmarie
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  2. Likaa S. Yahya
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Correspondence to Khalil H. Sayidmarie .

Editor information

Editors and Affiliations

  1. Instituto de Telecomunicações, Campus Universitário de Santiago, Aveiro, Portugal

    Issa Elfergani

  2. Instituto de Telecomunicações, Campus Universitário de Santiago, Aveiro, Portugal

    Abubakar Sadiq Hussaini

  3. Instituto de Telecomunicações, Campus Universitário de Santiago, Aveiro, Portugal

    Jonathan Rodriguez

  4. School of Engineering and Informatics, University of Bradford, Bradford, United Kingdom

    Raed Abd-Alhameed

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Sayidmarie, K.H., Yahya, L.S. (2018). Double-Monopole Crescent-Shaped Antennas with High Isolation for WLAN and WIMAX Applications. In: Elfergani, I., Hussaini, A., Rodriguez, J., Abd-Alhameed, R. (eds) Antenna Fundamentals for Legacy Mobile Applications and Beyond. Springer, Cham. https://doi.org/10.1007/978-3-319-63967-3_3

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  • DOI: https://doi.org/10.1007/978-3-319-63967-3_3

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-63966-6

  • Online ISBN: 978-3-319-63967-3

  • eBook Packages: EngineeringEngineering (R0)

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