sinal wifi fraco ubuntu 16.04

Question

description: Wireless interface
       product: RTL8723BE PCIe Wireless Network Adapter
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: wlo1
       version: 00
       serial: 48:e2:44:11:59:ed
       width: 64 bits
       clock: 33MHz