A multi-band Wi-Fi access point is provided to prevent performance degradation due to mutual interference between bands. Multi-band Wi-Fi access point of the present invention, the antenna; An N frequency duplexer connected to the antenna to separate N frequency signals; N RF switches having a common terminal 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 the 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; By receiving a reference signal that combines the RF reception signal of the Wi-Fi access point with sideband noise output to the N low-noise amplifiers and the RF transmission signal from other channels, the side-band noise is removed from the Wi-Fi access point. And N noise cancellers that respectively output RF reception signals to the input terminals of the N Wi-Fi transceivers. According to the present invention, since the sideband noise of the Wi-Fi signal input to the receiving end of the Wi-Fi transceiver is removed, it does not cause interference to the receiving channel.
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