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The Impact of Slow-Wave Modes on the Radiation Performance of a Corrugated Horn Antenna

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Abstract

Corrugated horn antennas offer many advantages compared with other waveguide radiators. A major disadvantage which is inherent with the design of a corrugated horn is the fact that slow-wave modes may exist within the horn antenna. In this paper far-field measurements of a W-band horn antenna are presented. The experimental data is compared with simulated data to confirm the presence of slow-wave modes. The analysis is completed by determining the waist, the gaussicity and the phase center location of both the experimental and model data. Finally a redesign approach is proposed which suppresses the slow-wave modes and therefore increases the usable bandwidth of the horn antenna.

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Acknowledgements

This work was supported by the Swiss National Science Foundation under Grant 200020-100167 and 200020-19908.

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Authors and Affiliations

  1. Institute of Applied Physics, Berne, Switzerland

    Philipp Fürholz & Axel Murk

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  1. Philipp Fürholz
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  2. Axel Murk
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Correspondence to Philipp Fürholz.

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Fürholz, P., Murk, A. The Impact of Slow-Wave Modes on the Radiation Performance of a Corrugated Horn Antenna. J Infrared Milli Terahz Waves 31, 169–180 (2010). https://doi.org/10.1007/s10762-009-9577-4

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  • DOI: https://doi.org/10.1007/s10762-009-9577-4

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