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This paper presents a millimeter wave(mm-wave) oscillator that generates signal at 36.56 GHz. The mm-wave oscillator is realized in a UMC 0.18 m CMOS process. The linear superposition(LS) technique breaks through the limit of cut-off frequency(fT/, and realizes a much higher oscillation than fT. Measurement results show that the LS oscillator produces a calibrated –37.17 dBm output power when biased at 1.8 V; the output power of fundamental signal is –10.85 dBm after calibration. The measured phase noise at 1 MHz frequency offset is–112.54 dBc/Hz at the frequency of 9.14 GHz. This circuit can be properly applied to mm-wave communication systems with advantages of low cost and high integration density.
The paper presents a millimeter wave (mm-wave) oscillator that generates signal at 36.56 GHz. The mm-wave oscillator is realized in a UMC 0.18 m CMOS process. The linear superposition (LS) technique breaks through the limit of cut- (fT /, and realizes a much higher oscillation than fT. Measurement results show that the LS oscillator produces a calibrated -37.17 dBm output power when biased at 1.8 V; the output power of fundamental signal is -10.85 dBm after calibration. The measured phase noise at 1 MHz frequency offset is-112.54 dBc / Hz at the frequency of 9.14 GHz. This circuit can be properly applied to mm-wave communication systems with advantages of low cost and high integration density.