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A simple but efficient transceiver for UWB Impulse Radio (UWB-IR) signal generation in millimeter-wave band for Giga-bit WLAN is presented. The emitter involves a subharmonic Injection Locked Oscillator (ILO) driven by a pulse generator with fast transition time. Its frequency oscillation is locked to one of the numerous harmonic components of the pulse generator at 30 GHZ, which permits to obtain a stable pulse to pulse phase condition. The start of the oscillations is studied, using the external quality factor Qext as main factor. Then a frequency doubler permits this modulated signal to be transposed at 60 GHz. The receiver includes a LNA, a RF-detector and a UWB Sample and Hold Amplifier (SHA). Some MMIC have been designed using a commercial pHEMT foundry process (ft = 100GHz): a pulse generator exhibiting less than 25 ps transition times, an oscillator with a 30 GHz free running output frequency, a LNA, a MPA, a RF detector at 60 GHz and a UWB SHA.