The tracking solutions for unmanned aerial vehicles (UAVs) can adopt the following techniques:

1. GPS positioning: UAVs are equipped with GPS modules to determine their position by receiving satellite signals, which enables real-time tracking of UAVs' location information.

2. Visual tracking: Utilize cameras or other sensor devices to visually recognize and track UAVs. Computer vision algorithms can be employed to detect features of UAVs, such as shape and color, and perform real-time tracking.

3. Infrared tracking: Utilize infrared sensors to detect the heat and infrared radiation of UAVs, enabling tracking in nighttime or complex environments.

4. Radar technology: Install radar devices on UAVs to determine the position and distance of UAVs by utilizing reflected radar signals.

5. Signal interference and protection: Using interference devices to disrupt the communication or navigation signals of UAVs, forcing them to return or land.

A suitable tracking solution should be selected based on the specific application scenario and requirements, which may require a combination of multiple techniques to achieve accurate tracking of UAVs.