Hey guys, Im a bit of a noob when it comes to cctv, and im trying to help my mom by setting up two cameras in the shed opposite her house to replace and old camera (approx 10 years b&w) that is rapidly failing (but was connected to a monitor in the house via a heavy duty co-axial cable which is laid underground). She is on a tight budget, so after looking round i decided on two wireless swann guardian adw-400 cctv cams which can be seen here: 8zv6KPTMjlo
Anyway, although the house and the shed are within the stated range, it turned out that the signal strength was too poor (my best guess would be the two concrete exterior walls the signal would have to pass through). I have been looking into 2.4 ghz yagi 14dbi panel antennas on ebay that use a sma connection that is compatible with the cameras from what i can see but i was wondering if it would be better to connect the two cameras using a sma splitter to the existing heavy duty coaxial cable using an adaptor?
There is also the matter of the reciever box... can i connect this to the coaxial cable using another adaptor or is there a simpler solution? I would really appreicate any help you guys can offer as I really just want to get it sorted so she can feel secure. What is the best thing to do?