Multi-band Wi-Fi Access Point which removes sideband noise

摘要

A multi-band Wi-Fi access point is provided that can prevent performance degradation due to mutual interference between bands. The multi-band Wi-Fi access point of the present invention includes an antenna; An N frequency duplexer connected to the antenna to separate the N frequency signals; N RF switches having a common terminal respectively connected to one of the N terminals of the N frequency duplexer, and a first terminal and a second terminal selectively connected to the common terminal; N WiFi transceivers; N power amplifiers having input terminals connected to output terminals of the N Wi-Fi transceivers, and output terminals connected to the first terminals of the N RF switches; N low noise amplifiers having input terminals connected to the second terminals of the N RF switches and output terminals connected to input terminals of the N Wi-Fi transceivers, respectively; A reference signal obtained by combining an RF reception signal of a Wi-Fi access point including sideband noise output to the N low-noise amplifiers and an RF transmission signal from other channels is received, and the sideband noise is removed from the Wi-Fi access point. N noise cancellers respectively outputting RF received signals to the input terminals of the N WiFi transceivers are provided. According to the present invention, since sideband noise of a Wi-Fi signal input to a receiving end of a Wi-Fi transceiver is removed, interference does not occur in a receiving channel.