Title :
Design of a small and low-profile 2×2 hemispherical helical antenna array for mobile satellite communications
Author :
Hui, H.T. ; Yung, Edward K N ; Law, C.L. ; Koh, Y.S. ; Koh, W.L.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore
Abstract :
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.
Keywords :
antenna arrays; antenna radiation patterns; electromagnetic wave polarisation; helical antennas; mobile satellite communication; 15 dB; 2×2 hemispherical helical antenna array; INMARSAT satellite reception; axial ratio bandwidth; circular polarization; cross-polarization level; half-power beamwidth; mobile satellite communication; radiation pattern; sidelobe level; small low-profile helical antenna array; Antenna arrays; Antenna radiation patterns; Bandwidth; Gain; Helical antennas; Mobile antennas; Polarization; Satellite antennas; Satellite communication; Vehicles;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2003.822410
