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access icon free Dual-polarised X-band patch sub-array with hybrid feed network for integrated small-satellite SAR payload

  • Author(s): X. Zhao 1 ; S.P. Yeo 1 ; L.C. Ong 2
    • View affiliations
  • Source: Volume 53, Issue 23, 09 November 2017, p. 1501 – 1502
    DOI:  10.1049/el.2017.2208 , Print ISSN 0013-5194, Online ISSN 1350-911X
© The Institution of Engineering and Technology
Received 09/06/2017, Published 10/10/2017

A low-profile wideband dual-polarised X-band patch sub-array fed by a hybrid series/parallel network is designed for an integrated small-satellite synthetic aperture radar payload. The experimental results demonstrate that the sub-array, with 1 × 16 patch radiators, fully covers the targeted 9.65 GHz band with 14 dB bandwidths of 9–10.3 GHz for V-polarisation (VP) and 9.3–9.95 GHz for H-polarisation (HP). The isolation between the different feed ports is higher than 36 dB with a peak value of 45 dB. The sub-array achieves cross-to-co-polarisation ratios of below −32 dB within half-power beamwidth scopes of 6° for both HP and VP. The sidelobes maintain −24 dB for HP and −20 dB for VP. The average realised gains are around 17 dBi for both polarisations.

Inspec keywords: microwave antenna arrays; radar antennas; antenna radiation patterns; spaceborne radar; microstrip antenna arrays; electromagnetic wave polarisation; synthetic aperture radar; antenna feeds

Other keywords: V-polarisation; gain 14 dB; gain -20 dB; frequency 9 GHz to 10.3 GHz; VP; integrated small-satellite synthetic aperture radar payload; H-polarisation; low-profile wideband dual-polarised X-band patch subarray fed; gain 45 dB; integrated small-satellite SAR payload; hybrid series-parallel network; hybrid feed network; cross-to-co-polarisation ratio; HP; gain -24 dB

Subjects: Radar equipment, systems and applications; Antenna arrays; Antenna accessories

References

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      • 3. Grafmuller, B., Herschlein, A., Fischer, C.: ‘The TerraSAR-X antenna system’. Proc. IEEE Int. Radar Conf., Arlington, VA, USA, May 2010, pp. 222–225, doi: 10.1109/RADAR.2005.1435823.
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      • 5. Balanis, C.A.: ‘Antenna theory: analysis and design’ (John Wiley & Sons, Hoboken, NJ, USA, 2005, 3rd edn.).
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      • 4. Zhao, X., Tian, B.N., Yeo, S.P., et al: ‘Design of low-profile broadband dual-polarized integrated patch sub-array for X-band SAR payload on small satellite’. Proc. IEEE APWC 2016, Cairns, Australia, September 2016, pp. 27–29, doi: 10.1109/APWC.2016.7738109.
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2017.2208
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