~ Abstmcf -This paper describes the successful development of 38/77 GHz transmit MMICs for automotive applicatious. They consist of a 38 GHz amplifier, a frequency doubler, and a 77 GHz power amplifier. These amplifiers achieve output powers of 16 dBm at 38 GHz and 15 dBm at 76.5 GHz at 1 dB gain compression point The output power of the 77 GHz amplifier is one of the highest delivered by a single chip MMlC at 76.5 GHz. The frequency doubler delivers an output power of 5.7 dBm at 76.5 GHz. These results are promising for automotive applications in the W-band.
A 19 GHz extremely low phase noise voltage controlled oscillator (VCO) MMIC is presented. To reduce the phase noise of the VCO, a hetemstructure field effect transistor (HFET) is used as the active device, because its property of low frequency noise is superior to that of high electron mobility transistor (HEMT). This VCO showed the typical phase noise of -120 dBdHz at 1 MHz offset from carrier. This performance is better than other VCOs operating above 10 GHz. Measured tuning range is 400 MHz and output power is 2 dBm. The fabricated MMIC chip size is 2.7 mm x 1.4 mm.0-7803-7695-1/03/
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