External antennas for more coverage. External antennas help improve Wi-Fi coverage throughout large homes and even backyards. Better Wi-Fi coverage and more speed. Extend your wireless network and eliminate dead spots. Boost the range of your existing Wi-Fi and create a stronger signal in hard-to-reach areas. Expand your Wi-Fi network with access point mode. Simply connect your extender using an Ethernet cable to your router and upgrade your Wi-Fi network.