Wifi Signal Strength Issue on my phone

Privacy Settings

1. Toggle off Location Services. Go to Settings > Privacy > Location Services and turn it off
2. Many users find that disabling System Services’ WiFi Networking solves the problem
3. Go to Settings > Privacy > Location Services > System Services > and toggle off WiFi Networking

Consider more secure wifi configuration.

Change your router’s WiFi to use WPA2-AES (CCMP) with no WPA or TKIP. Updating this setting ensures that your devices always connect in one encryption mode

1. TKIP is obsolete and not considered secure. Choose WPA2, the latest encryption standard, with AES encryption for optimal security
2. If your router doesn’t specify TKIP or AES, the WPA2 option probably uses AES

Have you tried forgetting the network and reconnecting for reassigning your IP address from DHCP pool. At times when you move from one network to another the wifi at times does not immediately get hooked on to home wifi.