This paper presents a 5 GHz CMOS radio frequency(RF) transceiver built with 0.18μm RF-CMOS technology by using a proprietary protocol,which combines the new IEEE 802.11n features such as multiple-in multiple-out(MIMO) technology with other wireless technologies to provide high data rate robust real-time high definition television(HDTV) distribution within a home environment.The RF frequencies cover from 4.9 to 5.9 GHz:the industrial,scientific and medical(ISM) band.Each RF channel bandwidth is 20 MHz.The transceiver utilizes a direct up transmitter and low-IF receiver architecture.A dual-quadrature direct up conversion mixer is used that achieves better than 35 dB image rejection without any on chip calibration.The measurement shows a 6 dB typical receiver noise figure and a better than 33 dB transmitter error vector magnitude(EVM) at -3 dBm output power. This paper presents a 5 GHz CMOS radio frequency (RF) transceiver built with 0.18 μm RF-CMOS technology by using a proprietary protocol, which combines the new IEEE 802.11n features such as multiple-in multiple-out (MIMO) technology with other wireless technologies to provide high data rate robust real-time high definition television (HDTV) distribution within a home environment. RF frequencies cover from 4.9 to 5.9 GHz: the industrial, scientific and medical (ISM) band .ach RF channel bandwidth is 20 MHz The transceiver utilizes a direct up transmitter and low-IF receiver architecture. A dual-quadrature direct up conversion mixer is used that achieves better than 35 dB image rejection without any on chip calibration. The measurement shows a 6 dB typical receiver noise figure and a better than 33 dB transmitter error vector magnitude (EVM) at -3 dBm output power.