423When we use phased array antennas, we need to calculate the off-axis angle of the phased array antenna according to the area used by the user, and then estimate the decrease value of the antenna gain according to the off-axis angle, so as to leave enough margin when making the satellite communication link budget.
Advantages and disadvantages of phased array antennas
Advantages: low height, low profile, low installation height requirements, especially suitable for airborne and other scenarios with limited installation space; With electronic scanning, the response speed is fast.
Disadvantages: Cost - If you want to achieve the same antenna gain, the cost of a phased array antenna will be much more expensive than that of a parabolic antenna; The effect of low elevation angles.
