Performance study of a 248 GHz voltage controlled hetero-integrated source in InP-on-BiCMOS technology
Int. J. Microwave Wireless Technolog., vol. 9, no. 2, pp. 259-268 (2017).
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This paper presents the performance study of a 248 GHz voltage-controlled hetero-integrated signal source using InP-on-BiCMOS technology. The source consists of a Voltage Controlled Oscillator (VCO) in 0.25 µm BiCMOS technology and a frequency multiplier in 0.8 µm transferred-substrate (TS) InP-HBT technology, which is integrated on top of the BiCMOS MMIC in a wafer-level based BCB bonding process. The vertical transitions from BiCMOS to InP in this process exhibit broadband properties with insertion losses below 0.5 dB up to 325 GHz. The VCO operates at 82.7 GHz with an output power of 6 dBm and the combined circuit delivers -9 dBm at 248 GHz with 1.22 % tuning range. The phase noise of the combined circuit is -85 dBc/Hz at 1 MHz offset. The measured output return loss of the hetero-integrated source is >10 dB within a broad frequency range. This result shows the potential of the hetero integrated process for THz frequencies.
1 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, 12489 Berlin, Germany
2 IHP - Leibniz-Institut für innovative Mikroelektronik GmbH, Frankfurt (Oder), Germany
3 J. W. Goethe Universität Frankfurt/M, Frankfurt/M, Germany
4 TUB, HFT4, Einsteinufer 25, 10587 Berlin, Germany
InP-on-BiCMOS, Frequency tripler, Hetero-integration, InP-DHBT, SiGe-BiCMOS, Transferred-substrate (TS), Voltage controlled oscillator (VCO), InP double heterojunction bipolar transistor (DHBT), Monolithic microwave integrated circuit (MMIC), Millimeter wave (mm-wave) source.