When sourcing parabolic antennas, the most critical factor is Antenna Gain (measured in dBi), which determines the signal strength and distance capability. You must also verify the Frequency Range (e.g., 2.4GHz, 5GHz, or Ku/Ka bands) to ensure compatibility with your communication system. Additionally, pay close attention to the Beamwidth; a narrower beamwidth provides higher precision and less interference but requires more accurate alignment. For outdoor installations, ensure the Wind Loading capacity and Front-to-Back Ratio meet your environmental and signal purity requirements.