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Modified end-fire bow-tie antenna fed by microstrip line for wideband communication systems

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  • Aliakbar Dastranj

Abstract

A broadband microstrip-fed modified printed bow-tie antenna is proposed. Using a rounded ground plane, adding a pair of circular patches to the bow-tie arms, and optimizing the design parameters, an operation frequency band of 3.3–15.2 GHz is achieved. The development stages of the modified bow-tie radiator is exhibited and it is shown that by designing different antenna structures, the impedance bandwidth (defined by –10-dB reflection coefficient) can be improved from 37% to more than 128%. The modified antenna possesses advantages of not only a broad bandwidth of 128%, but also a small size of 34 × 34 × 1.2 mm3. The designed antenna was fabricated and tested. The impedance matching, group delay, and the antenna radiation characteristics, including co-polarized far-field patterns, cross-polarized patterns, radiation efficiency, and gain were analyzed with numerical simulation and experimental measurement. Measured data are in good agreement with the simulated results. Based on the obtained frequency- and time-domain characteristics, the designed antenna is an attractive candidate for broadband communication applications.

Suggested Citation

  • Aliakbar Dastranj, 2018. "Modified end-fire bow-tie antenna fed by microstrip line for wideband communication systems," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 32(13), pages 1629-1643, September.
    • Handle: RePEc:taf:tewaxx:v:32:y:2018:i:13:p:1629-1643
    DOI: 10.1080/09205071.2018.1464962
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