Results of L-band satellite experiments for personal communications systems

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Results of L-band satellite experiments for personal communications systems

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© The Institution of Electrical Engineers
Published

Hand-held personal communications systems will be power limited and restricted to small operating margins. Limited blockage and multipath experiments have been used to develop preliminary fade margins and performance specifications but these have so far ignored effects induced by the satellite. The results reported here indicate that diurnal motion of the satellite, or its corollary movement of the antenna can cause signal variations in excess of 9 dB peak-to-peak for low gain antennas. A preliminary finding is that close-in multipath effects are the cause.

Inspec keywords: radiofrequency interference; receiving antennas; satellite antennas; fading; satellite relay systems; personal communication networks; mobile radio systems; antenna radiation patterns; radiowave propagation; mobile antennas

Other keywords: personal communications; low gain antennas; mobile radio systems; signal variations; microwave links; diurnal motion; corollary movement; close-in multipath effects; L-band satellite experiments; GPS; multipath experiments; fade margins

Subjects: Satellite communication systems; Telephony; Radiowave propagation; Mobile radio systems; Electromagnetic compatibility and interference

References

    1. 1)
      • W.J. Vogel , U.S. Hong . Measurement and modeling of land mobile satellite propagation at UHF and L-band. IEEE Trans. , 707 - 719
    2. 2)
      • G. Butt , B.G. Evans , M. Richharia . Multiband propagation experiment for narrowband characterization of high elevatioon angle land mobile-satellite channels. Electron. Lett. , 1449 - 1450
    3. 3)
      • Allnutt, R.M., Dissanayake, A.W., Lin, K.T., Zaks, C.: `Propagation considerations on L-band handheld communication service offerings via satellite', Proc. 8th Int. Conf. on Antennas Propagation, 1993, Edinburgh.
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