In this paper,a hybrid integrated broadband Doherty power amplifier(DPA)based on a multi-chip module(MCM),whose active devices are fabricated using the gallium nitride(GaN)process and whose passive circuits are fabric...In this paper,a hybrid integrated broadband Doherty power amplifier(DPA)based on a multi-chip module(MCM),whose active devices are fabricated using the gallium nitride(GaN)process and whose passive circuits are fabricated using the gallium arsenide(GaAs)integrated passive device(IPD)process,is proposed for 5G massive multiple-input multiple-output(MIMO)application.An inverted DPA structure with a low-Q output network is proposed to achieve better bandwidth performance,and a single-driver architecture is adopted for a chip with high gain and small area.The proposed DPA has a bandwidth of 4.4-5.0 GHz that can achieve a saturation of more than 45.0 dBm.The gain compression from 37 dBm to saturation power is less than 4 dB,and the average power-added efficiency(PAE)is 36.3%with an 8.5 dB peak-to-average power ratio(PAPR)in 4.5-5.0 GHz.The measured adjacent channel power ratio(ACPR)is better than50 dBc after digital predistortion(DPD),exhibiting satisfactory linearity.展开更多
This paper presents a timing-driven MultiChip Module (MCM) routing algorithm considering crosstalk, which maximizes routing density while minimizing vias and total wire length. The routing algorithm allows a more glob...This paper presents a timing-driven MultiChip Module (MCM) routing algorithm considering crosstalk, which maximizes routing density while minimizing vias and total wire length. The routing algorithm allows a more global solution as well as the incorporation of more accurate crosstalk modeling. In addition, various time domain characteristics of MCM are analyzed in this contribution. A deembedding technique for the S -parametercalculation is presented and functions for the time-domain signals are investigated in order to decrease the computation time. Routing results show that the proposed algorithm consistently produces the better results than other previously proposed routers while offering flexibility for future incorporation of noise and delay constraints.展开更多
The layout of power modules is one of the key points in power module design,especially for silicon carbide module,which may parallel more devices compared with silicon counterpart.In this paper,along with the design e...The layout of power modules is one of the key points in power module design,especially for silicon carbide module,which may parallel more devices compared with silicon counterpart.In this paper,along with the design example,a improved layout design method for planar power modules is presented.Some practical considerations and implementations are also introduced in the optimization of module layout design.展开更多
本文主要说明了淀积型多芯片组件(MCM-D)技术所使用的主要材料的热特性。此技术采用倒装片技术把硅芯片安装到硅基板上。阐述了薄膜电阻和接触电阻的测量与所使用金属的温度范围-28℃-100℃的比较。一套典型的试验结构诸如开尔文接触、...本文主要说明了淀积型多芯片组件(MCM-D)技术所使用的主要材料的热特性。此技术采用倒装片技术把硅芯片安装到硅基板上。阐述了薄膜电阻和接触电阻的测量与所使用金属的温度范围-28℃-100℃的比较。一套典型的试验结构诸如开尔文接触、横桥电阻(CBR)及Van der Pauw 结构不仅已用于此技术,而且为了测试通过球倒装片连接的接触电阻,采用一新的开尔文式结构。已获得MCM封装的热模型,并考虑由此类封装增加的所有的热电阻。展开更多
A novel multi-chip module(MCM) interconnect test generation scheme based on ant algorithm(AA) with mutation operator was presented.By combing the characteristics of MCM interconnect test generation,the pheromone updat...A novel multi-chip module(MCM) interconnect test generation scheme based on ant algorithm(AA) with mutation operator was presented.By combing the characteristics of MCM interconnect test generation,the pheromone updating rule and state transition rule of AA is designed.Using mutation operator,this scheme overcomes ordinary AA’s defects of slow convergence speed,easy to get stagnate,and low ability of full search.The international standard MCM benchmark circuit provided by the MCNC group was used to verify the approach.The results of simulation experiments,which compare to the results of standard ant algorithm,genetic algorithm(GA) and other deterministic interconnecting algorithms,show that the proposed scheme can achieve high fault coverage,compact test set and short CPU time,that it is a newer optimized method deserving research.展开更多
Non Orthogonal Frequency Division Multiplexing (NOFDM) systems make use of a transmission signal set which is not restricted to orthonormal bases unlike previous OFDM systems. The usage of non-orthogonal bases general...Non Orthogonal Frequency Division Multiplexing (NOFDM) systems make use of a transmission signal set which is not restricted to orthonormal bases unlike previous OFDM systems. The usage of non-orthogonal bases generally results in a trade-off between Bit Error Rate (BER) and receiver complexity. This paper studies the use of Gabor based on designing a Spectrally Efficient Multi-Carrier Modulation Scheme. Using Gabor Transform with a specific Gaussian envelope;we derive the expected BER-SNR performance. The spectral usage of such a NOFDM system when affected by a channel that imparts Additive White Gaussian Noise (AWGN) is estimated. We compare the obtained results with an OFDM system and observe that with comparable BER performance, this system gives a better spectral usage. The effect of window length on spectral usage is also analyzed.展开更多
基金supported in part by the National Key Research and Development Program of China(2021YFA0716601)the National Science Fund(62225111).
文摘In this paper,a hybrid integrated broadband Doherty power amplifier(DPA)based on a multi-chip module(MCM),whose active devices are fabricated using the gallium nitride(GaN)process and whose passive circuits are fabricated using the gallium arsenide(GaAs)integrated passive device(IPD)process,is proposed for 5G massive multiple-input multiple-output(MIMO)application.An inverted DPA structure with a low-Q output network is proposed to achieve better bandwidth performance,and a single-driver architecture is adopted for a chip with high gain and small area.The proposed DPA has a bandwidth of 4.4-5.0 GHz that can achieve a saturation of more than 45.0 dBm.The gain compression from 37 dBm to saturation power is less than 4 dB,and the average power-added efficiency(PAE)is 36.3%with an 8.5 dB peak-to-average power ratio(PAPR)in 4.5-5.0 GHz.The measured adjacent channel power ratio(ACPR)is better than50 dBc after digital predistortion(DPD),exhibiting satisfactory linearity.
基金Supported by National Defence Fund of China (No. 41323020204).
文摘This paper presents a timing-driven MultiChip Module (MCM) routing algorithm considering crosstalk, which maximizes routing density while minimizing vias and total wire length. The routing algorithm allows a more global solution as well as the incorporation of more accurate crosstalk modeling. In addition, various time domain characteristics of MCM are analyzed in this contribution. A deembedding technique for the S -parametercalculation is presented and functions for the time-domain signals are investigated in order to decrease the computation time. Routing results show that the proposed algorithm consistently produces the better results than other previously proposed routers while offering flexibility for future incorporation of noise and delay constraints.
基金This work is supported by The National key research and development program of China(2016YFB0100600)the Key Program of Bureau of Frontier Sciences and Education,Chinese Academy of Sciences(QYZDBSSW-JSC044)the National Natural Science Foundation of China(No.51507166).
文摘The layout of power modules is one of the key points in power module design,especially for silicon carbide module,which may parallel more devices compared with silicon counterpart.In this paper,along with the design example,a improved layout design method for planar power modules is presented.Some practical considerations and implementations are also introduced in the optimization of module layout design.
文摘本文主要说明了淀积型多芯片组件(MCM-D)技术所使用的主要材料的热特性。此技术采用倒装片技术把硅芯片安装到硅基板上。阐述了薄膜电阻和接触电阻的测量与所使用金属的温度范围-28℃-100℃的比较。一套典型的试验结构诸如开尔文接触、横桥电阻(CBR)及Van der Pauw 结构不仅已用于此技术,而且为了测试通过球倒装片连接的接触电阻,采用一新的开尔文式结构。已获得MCM封装的热模型,并考虑由此类封装增加的所有的热电阻。
文摘A novel multi-chip module(MCM) interconnect test generation scheme based on ant algorithm(AA) with mutation operator was presented.By combing the characteristics of MCM interconnect test generation,the pheromone updating rule and state transition rule of AA is designed.Using mutation operator,this scheme overcomes ordinary AA’s defects of slow convergence speed,easy to get stagnate,and low ability of full search.The international standard MCM benchmark circuit provided by the MCNC group was used to verify the approach.The results of simulation experiments,which compare to the results of standard ant algorithm,genetic algorithm(GA) and other deterministic interconnecting algorithms,show that the proposed scheme can achieve high fault coverage,compact test set and short CPU time,that it is a newer optimized method deserving research.
文摘Non Orthogonal Frequency Division Multiplexing (NOFDM) systems make use of a transmission signal set which is not restricted to orthonormal bases unlike previous OFDM systems. The usage of non-orthogonal bases generally results in a trade-off between Bit Error Rate (BER) and receiver complexity. This paper studies the use of Gabor based on designing a Spectrally Efficient Multi-Carrier Modulation Scheme. Using Gabor Transform with a specific Gaussian envelope;we derive the expected BER-SNR performance. The spectral usage of such a NOFDM system when affected by a channel that imparts Additive White Gaussian Noise (AWGN) is estimated. We compare the obtained results with an OFDM system and observe that with comparable BER performance, this system gives a better spectral usage. The effect of window length on spectral usage is also analyzed.
