The enclosed high-gain wifi panel antenna with a cavity is commonly used in the following scenarios:

1. Long-distance communication: Due to its high-gain characteristics, the enclosed high-gain panel antenna is very useful for long-distance communication needs. For example, it is used for wireless network coverage in wide areas, rural areas, or mountainous regions where communication needs to span large distances.

2. Point-to-point communication: The enclosed high-gain panel antenna with a cavity is suitable for point-to-point communication scenarios where signals need to be transmitted from one fixed location to another. This type of antenna is commonly used to establish radio links, such as network bridging between two buildings or for remote monitoring and video transmission.

3. Radio broadcasting and television transmission: The enclosed high-gain panel antenna with a cavity is also widely used in radio broadcasting and television transmission. These antennas provide stronger signal gain to increase the coverage range and reception quality of radio and television signals.

4. Wireless communication infrastructure: The enclosed high-gain panel antenna with a cavity plays an important role in wireless communication infrastructure. For example, in mobile communication base stations, these antennas can be used to provide long-distance coverage and enhance signal strength and stability.

It is important to note that the specific applications depend on specific requirements and environments. The design and installation of enclosed high-gain panel antennas with cavities need to be customized according to specific application scenarios and requirements.