ALC has a higher gain 5dbi antenna that is compatible with all ALC SightHD cameras that have an external antenna. This longer antenna will boost the signal from the camera to the Wi-Fi router. The antenna part number is ANT5DB.
We also have a 10 ft cable (CAB10F) that gives you the flexibility to move the antenna away from the camera and allow you to position the antenna in a better location to have a stronger signal to your router. This cable works in conjunction with the 5dbi antenna. This works especially well with metal buildings. It allows you to position the antenna near a window or actually inside the building where the monitor is located.