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An Approach to the Determination of the Phase Center of Vivaldi-Based UWB Antenna

  • Bo-shi Jin
  • Qun Wu
  • Yu-ming Wu
  • Li Bian
  • Le-Wei Li

The phase center of ultra-wide band (UWB) antenna acts a lot to the performance in the time domain [1]. Usually, the width of transmitted impulse is about several hundreds of nanoseconds, so even fine phase center drift will influence the phase of far field much and lead to the waveform dispersion in the time domain [2-3]

if we recognize the far field which is radiated by the antenna as a sphere, then the phase center of antenna should be the center of the sphere. Unluckily, the antenna may have the phase center or not because it correlates to the beam widths and the different tangent planes. In other words, an antenna can’t only have one phase center, the phase center will distribute over the scope under the different beam widths and tangent planes. The shorter the radius of scope, the more stable the phase center is. But the concept above mentioned is only suitable for the conventional antennas, for most of conventional antennas are narrow band, we can deem the phase center constantly in the operating frequency band. For UWB antenna applications, the phase center is required to be stable as the beam width and frequency vary at the same time. Conventionally, the phase center can be deduced according to the directional diagram, but not all of antennas can be implemented because of complicated structures, therefore, numerical methods are effective ways[4]. In this paper, the finite integration method (FIM) is used to calculate the phase center of typical Vivaldi antenna which is used for the ultra-wide band communication system.

Keywords

Tangent Plane Beam Width Operating Frequency Band Cross Polarization Level Conventional Antenna 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References:

  1. [1]
    Schantz, H.G, Dispersion and UWB antennas, Joint with Conference on Ultra Wideband Systems and Technologies, Joint UWBST and IWUWBS, , 2004, pp. 161-165.Google Scholar
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    Zhao, C.-D., Analysis on the properties of a coupled planar dipole UWB Antenna, IEEE Antennas and Wireless Propagation Letters, vol.3 (1), pp. 317-320 (2004)CrossRefADSGoogle Scholar
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    Schantz, H.G., A brief history of UWB antennas, IEEE Aerospace and Electronic Systems Magazine, vol .19(4), pp.22-26 (2004).CrossRefGoogle Scholar
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    Moheb, H., A. Sebak, and L. Shafai, Phase centre analysis of array antennas and its significance for microwave landing system. IEE Conference Publication, 1999, pp. 213-216,Google Scholar
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    Stockbroeckx, B. and A.V. Vorst, Electromagnetic modes in conical transmission lines with application to the linearly tapered slot antenna, IEEE Transactions on Antennas and Propagation, vol.48 (3), pp. 447-455. (2000).CrossRefADSGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Bo-shi Jin
    • 1
  • Qun Wu
    • 1
  • Yu-ming Wu
    • 1
  • Li Bian
    • 1
  • Le-Wei Li
    • 2
  1. 1.Harbin Institute of TechnologyChina
  2. 2.National University of SingaporeSingapore

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