A Beam Forming Antenna Based on Earth Shape for Micro-satellites

This paper proposes a new wide-beam bifilar helix antenna with earth coverage beam for satellite communication. Former helix antennas for micro-satellites are focused on narrow-beam high-gain purpose and hard to realize the desired beam pattern within a wide angle range, making them unsuitable for earth coverage applications. This novel antenna realizes the uniform illumination of the earth's surface with miniaturized structure. (The earth coverage radiation pattern is obtained within the beamwidth of θ in the range of ±56°). According to the calculation, the antenna is modeled and simulated. The simulation results show good agreement.