研究目的
Extraction and verification of a small-signal model suitable for characterizing THz InP double heterojunction bipolar transistors (DHBTs) in the 0.2–325 GHz frequency range.
研究成果
The paper presented a direct parameter extraction method for determining the small signal equivalent circuit model for frequencies of up to 325 GHz. The intrinsic parameters of the model were extracted in the frequency band below 66 GHz, and the port lead parasitic inductance was extracted from the S-parameters measured in the frequency band above 80 GHz. The method was validated by using the data measured under different bias conditions to extract the model parameters. The simulation results of the model and the measured data are in good agreement.
研究不足
The influence of inductive parasitics becomes larger with increases in the working frequency, affecting the fitting accuracy of the S parameter, particularly the imaginary part.
1：Experimental Design and Method Selection:
The π-type topology is adopted in the intrinsic model. Capacitances Ccx and Cce are used to characterize the capacitive parasitics caused by the routing line connecting the collector terminal, base terminal and emitter terminal, respectively. The inductive parasitics introduced by the routing line are also considered. The initial values of the model parameters are extracted using a direct extraction method.
2：Sample Selection and Data Sources:
An InP DHBT with 1 emitter ?nger and an emitter size of 0.5 μm × 5 μm was used for verification.
3：5 μm × 5 μm was used for verification.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Agilent E8461A network analyzer (200 MHz–66 GHz), vector network analyzer frequency extenders from Farran Technology FEV-10-TR (75–110 GHz), FEV-06-TR (110–170 GHz), FEV-05 (140–220 GHz), FEV-03 (220–325 GHz), and a probe station from Cascade Microtech (Summit 11000B-S).
4：Experimental Procedures and Operational Workflow:
The S-parameters were measured using the mentioned equipment. The model parameters were extracted and fine-tuned using Keysight ICCAP software.
5：Data Analysis Methods:
The simulation results obtained by the extraction model and measured data are compared for agreement.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
