I think it improved my signal. I can not say. I went from 3x3 dBi antennas to these 3x9 dBi antennas. They're about three times longer than the old ones, and this router now has the same signal strength as my modem router, but the modem router doesn't have external antennas. A little disappointed as I don't think the move from 9dBi total to 27dBi total hasn't tripled or even doubled my signal.
Gadgets World FBA_ALFA ARSN19M OMNI Directional High Gain
9 Review
📶 Proxicast Ultra Low Profile MIMO 3G / 4G / LTE Omni-Directional Screw-Mount Antenna for Verizon, AT&T, Sprint (and Others) Modems & Routers with SMA External Antenna Ports
9 Review
📶 Hawking HAI6SIP: Boost Your Wireless Signal Range with Hi-Gain 6dB Omni-Directional Antenna
9 Review
Asus RP-N12 N300 WLAN Repeater 🔁 802.11 B/G/N - Boost Your Wireless Range!
10 Review
🔌 uni USB C Hub with Ethernet Adapter, 4K HDMI, Gigabit Ethernet, and 3 USB 3.0 Ports for MacBook Pro, iPad Pro, XPS
11 Review
🔌 StarTech.com NETRS232 Serial to IP Ethernet Device Server - DIN Rail Mountable - Serial Device Server - Serial Over IP Device Server (Black)
4 Review
🌐 StarTech.com NETRS2321P: 1-Port RS232 to Ethernet IP Converter, Serial over IP Device Server - Black
5 Review
HB-UMLS Sabrent USB 2.0 Hub with 4 Ports and LED Power Switches for Each Port
12 Review