为满足毫米波通信等应用领域对超宽带功率放大器的需求,文章采用南京电子器件研究所50 nm GaN HEMT工艺研制了一款覆盖W、F波段的超宽带功率放大器。首先,使用模型对实验数据进行拟合外推,得到宽带范围内管芯的功率阻抗;其次,采用LC结...为满足毫米波通信等应用领域对超宽带功率放大器的需求,文章采用南京电子器件研究所50 nm GaN HEMT工艺研制了一款覆盖W、F波段的超宽带功率放大器。首先,使用模型对实验数据进行拟合外推,得到宽带范围内管芯的功率阻抗;其次,采用LC结构加高低阻抗微带线方式进行宽带电路匹配,并设计了末级、级间和输入级的匹配电路拓扑结构;最后,对级间匹配电路进行综合优化调整,并采用兰格桥进行功率合成。最终,放大器在80GHz~140GHz范围内,典型线性增益达18dB,饱和输出功率达100mW,同时,在全频段范围内,芯片具有±1dB的功率平坦度和良好的回波损耗,在太赫兹领域具有广阔的应用前景。展开更多
Thinking ability is an important part of comprehensive quality and an important focus of modern higher education. In English teaching, we should pay more attention to the cultivation of students' critical thinking...Thinking ability is an important part of comprehensive quality and an important focus of modern higher education. In English teaching, we should pay more attention to the cultivation of students' critical thinking ability. Although remarkable progress has been made in College English teaching in the new era, there are a series of fundamental problems in the ways and means of College English teaching. The most important is that the current teaching system lacks the ability to train students to adapt to society. There are still many problems in the process of students learning English, which hinders the effectiveness of teaching. Although some students have good grades in English, they have a lot of English vocabulary. This paper explores the new mode of college English teaching, and cultivates the core from the perspective of speculative ability training. Explore the new model construction approach based on summarizing the value of speculative ability, and explore the corresponding training mode.展开更多
文摘为满足毫米波通信等应用领域对超宽带功率放大器的需求,文章采用南京电子器件研究所50 nm GaN HEMT工艺研制了一款覆盖W、F波段的超宽带功率放大器。首先,使用模型对实验数据进行拟合外推,得到宽带范围内管芯的功率阻抗;其次,采用LC结构加高低阻抗微带线方式进行宽带电路匹配,并设计了末级、级间和输入级的匹配电路拓扑结构;最后,对级间匹配电路进行综合优化调整,并采用兰格桥进行功率合成。最终,放大器在80GHz~140GHz范围内,典型线性增益达18dB,饱和输出功率达100mW,同时,在全频段范围内,芯片具有±1dB的功率平坦度和良好的回波损耗,在太赫兹领域具有广阔的应用前景。
文摘Thinking ability is an important part of comprehensive quality and an important focus of modern higher education. In English teaching, we should pay more attention to the cultivation of students' critical thinking ability. Although remarkable progress has been made in College English teaching in the new era, there are a series of fundamental problems in the ways and means of College English teaching. The most important is that the current teaching system lacks the ability to train students to adapt to society. There are still many problems in the process of students learning English, which hinders the effectiveness of teaching. Although some students have good grades in English, they have a lot of English vocabulary. This paper explores the new mode of college English teaching, and cultivates the core from the perspective of speculative ability training. Explore the new model construction approach based on summarizing the value of speculative ability, and explore the corresponding training mode.
