I burned the provided debian image, and the packet loss was very serious when I tested the ping

I purchased a 2.4G and 5G dual-band antenna, is this a problem with the purchased antenna? If so, please recommend a suitable antenna.

1.Can you check if ping the LAN will result in packet loss
2.Could you please enter the command to check the log:dmesg |grep delay

I didn’t try to ping with lan, this is the result of my “dmesg |grep delay”.

I tryed to ping with lan, but i also loss packets.