To Satisfy the Different Radiated Power Requirements For the Ultra-Wideband (Uwb) Data Transmitting In the Implantable Electronic Devices or the Wireless Component Inter Connections, a Novel Low-Power High- Speed Uwb Transmitter With Radiated Power Tuning Was Proposed. the Tunable Radiated Power Is Achieved By a Uwb Rf Buffer With a Peak Value Controller. the Designed Low-Complex Narrow Pulse Generator and Digital Ring On–Off Vco Ensure a High Speed Transmitting. the Low Power Is Realized By Using a Sub Tractor to Eliminate the Base-Band Component from the Output of the Vco and Making the Uwb Rf Buffer and the Vco Operating In Standby Mode. the Design Was Fabricated By a Standard 0.12 Μm Cmos Technology. the Count Gates Are 34 Instead of 45 to the Previous Work, Simulate Frequency Bandwidth from 5 to 13 Ghz and 1.104Mw Power Consume By Circuit Area of 0.12Mm2.