Ipad mini wifi

hello,

i used to connect my ipad mini wifi to a wifi connection and it worked properly. but i don't know what happened that it now have a problem connecting to a wifi connection. i updated my IOS before the problems occur. i don't know if its because of the updated IOS or just a weak connection.

it recognizes connections but it doesn't connect automatically. it keeps on losing its connection without even connecting to a wifi.

can anyone knows what might causes this problem?

your help will be very much appreciated. thank you in advance.