Hardware problem?

I’m currently using a Netgear WNR2000 wireless router. It’s several years old and runs the 802.11n standard. I’m discovering that its signal is fading when I get to the kitchen to try to use the tablet, and using Mom’s Mac out in the family room is becoming hopeless.

Has anyone bought an 802.11ac wireless router in the last year or so? Who recommends what? The budget is $100, tops.