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- W2127103623 abstract "A novel quadrature phase shift keying (QPSK) modulation method for RF signal is proposed in this paper. An injection-locked balanced oscillator (ILBO) operating in the 5.8-GHz ISM band is developed to demonstrate the approach using a hybrid integrated microwave-circuit technique. The developed ILBO shows a free-running performance with anti-phase outputs of −0.33 dBm at 5.8 GHz under dc bias of 1.183 V and 7.2 mA, total DC-to-RF efficiency of 21.8%, and phase noise of −114.85 dBc/Hz at 100-kHz offset. In the locked state by a 5.8-GHz injection signal of −23.0 dBm, the device achieved a locking bandwidth of 39 MHz from 5.7806–5.8196 GHz with a 22.5-dB locking gain, and acquired an output signal phase variation of up to 178° by altering the bias. Four different phase-state RF signals were obtained from the ILBO by combining the injection-locking phase-modulation scheme with a balanced oscillator topology of anti-phase outputs. As a consequence, the ILBO with a single-polar double-throw switch can function as a direct-conversion QPSK modulator by modulating both the oscillator and switch bias. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 38: 378–381, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11065" @default.
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- W2127103623 date "2003-07-07" @default.
- W2127103623 modified "2023-09-25" @default.
- W2127103623 title "A C-band injection-locked balanced oscillator for direct-conversion QPSK modulation applications" @default.
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- W2127103623 doi "https://doi.org/10.1002/mop.11065" @default.
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