Increasing wifi signal on router?

[tadam]

I am not able to get a strong enough wifi signal from my router to my back room in my house. I cannot relocate the router or move the device in the back room closer to the router. Is there any way to boost the wifi signal inside the controls of the router itself?

[DUSTMOLD]

I don't know of any way you can increase the power of the router,  however you could get a WIFi extender like a netgear EX6100