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Design of a small and low-profile 2×2 hemispherical helical antenna array for mobile satellite communications

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5 Author(s)
H. T. Hui ; Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore ; E. K. N. Yung ; C. L. Law ; Y. S. Koh
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A small and low-profile 2×2 hemispherical helical antenna array was designed for INMARSAT satellite reception. With only four elements fed by a simple network, the array can produce a gain of 15 dB, a 3-dB axial ratio bandwidth of nearly 14%, a cross-polarization level of smaller than -20 dB over the half-power beamwidth, and a radiation pattern with a sidelobe level of -20 dB. These characteristics are better than those obtained by previously proposed INMARSAT-M antennas.

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:52 ,  Issue: 1 )