Multi-band zigbee transceiver supporting ieee 802.15.4 wireless communication

The invention according to IEEE 802.15.4 multi-band ZigBee (Zigbee) transceiver to support wireless communication, North direction using European flavor system and 920 MHz band using the 860 MHz band of the IEEE 802.15.4 standard according to the received signal manner as in the 2.4 GHz ISM band international effort to use (worldwide version) select one transmission method in the method wherein the selected transmission method and the multi-mode modem and said multimode modem to a digital modulation and demodulation in a base band according to the transmission channel and frequency combining section for variably adjusting and outputting a carrier frequency corresponding to the selected transmission scheme by the receive input digital modulation signal output from the multimode modem to adjust a variable bandwidth, depending on the transmission mode, and low-pass filtering the carrier frequency and a transmitter for up-conversion to a radio modulation signal corresponding to the transport channel using the transport Radio modulation is down-converts the radio modulation signal by using the frequency to baseband, and adjusting the variable bandwidth, depending on the transmission mode to low-pass filtering the input from the receiver and the transmitter for input to said multimode modem to convert the digital modulated signal It relates to a radio modulation signal and outputs a signal to an antenna or received from the antenna in a multi-band transceiver that supports ZigBee IEEE 802.15.4 wireless communication terminal comprising: a transmission and reception switching and outputting to the receiving unit. According to the invention, a number can select the channel to minimize the effect of interfering signals and including a multi-mode modem jig cost European flavor / U.S-oriented / international effort to support the wireless sensor network system including an intelligent channel selection optionally can support at the same time, multi-band ZigBee transceiver according to the invention has the advantage, as compared to conventional single-band transceiver in price and hardware resource usage, area, and power consumption. IEEE 802.15.4, Europe, incense, incense North manner, international flavor, multi-mode modem, multi-mode RF / analog blocks, ZigBee