氮化镓高电子迁移率晶体管(Ga N HEMT)器件具有高功率和功率密度、高导热率、高击穿场强、宽工作频带等特点,适合小型化、宽频带、大功率应用。基于Ga N功率器件的特点研制了P波段宽带小型化40 W发射模块。通过负载牵引技术对Ga N HEMT...氮化镓高电子迁移率晶体管(Ga N HEMT)器件具有高功率和功率密度、高导热率、高击穿场强、宽工作频带等特点,适合小型化、宽频带、大功率应用。基于Ga N功率器件的特点研制了P波段宽带小型化40 W发射模块。通过负载牵引技术对Ga N HEMT器件进行了大信号参数的提取,运用ADS软件进行了匹配电路的设计,对功率放大器的性能指标进行了优化,并基于LTC4440和n MOS器件设计了高压脉冲调制电路。研制结果表明,该模块在400 MHz工作带宽内(相对带宽100%)的输出功率为46.6 d Bm(45.7 W),功率增益为36.6 d B,功率附加效率(PAE)为40.4%,杂波抑制为65.7 d Bc,脉冲顶降为0.4 d B,脉冲上升时间为75 ns,脉冲下降时间为50 ns,模块尺寸为50 mm×40 mm×20 mm。展开更多
The air-gun source has important applications as a new, environmentally, green active source in regional scale deep exploration. In the past, the air gun source was used mainly in smallscale, high-resolution shallow o...The air-gun source has important applications as a new, environmentally, green active source in regional scale deep exploration. In the past, the air gun source was used mainly in smallscale, high-resolution shallow oil exploration, but has a lack of adequate research in deep exploration. In order to study the selection of work parameters and field conditions of the air gun source in deep exploration, this paper does the following work： （1） analyze the characteristics of the air gun source using air gun experiments; （2） simulate the air gun signal and air gun-array signal based on the theory of free bubble oscillation to analyze the influence of bubble oscillation and study the wavelet energy and spectrum characteristics needed in deep exploration; （3） on the basis of theoretical simulation, study the influence of work parameters, such as air-gun capacity, work stress and depth on air gun signal and analyze the influence of air-gun array inspired moment and spacing of different air guns on air gun-array signals; and （4） study energy reflection and transmission coefficients for different underwater interfaces, which is very useful for choosing suitable field conditions.展开更多
A 130 nm CMOS complementary-conducting-strip transmission line(CCS-TL)based multi-stage amplifier beyond 100 GHz was presented in this paper. Different structural parameters were investigated to achieve higher quality...A 130 nm CMOS complementary-conducting-strip transmission line(CCS-TL)based multi-stage amplifier beyond 100 GHz was presented in this paper. Different structural parameters were investigated to achieve higher quality factor for the matching circuits. Moreover, CCS-TL based Marchand balun was implemented to achieve higher output power. The measured small signal gain was higher than 5 d B from 101 GHz to 110 GHz. DC power consumption was 67.2 mW with V_D=1.2 V, and the chip size including contact PADs was 1.12 mm×0.81 mm.展开更多
文摘氮化镓高电子迁移率晶体管(Ga N HEMT)器件具有高功率和功率密度、高导热率、高击穿场强、宽工作频带等特点,适合小型化、宽频带、大功率应用。基于Ga N功率器件的特点研制了P波段宽带小型化40 W发射模块。通过负载牵引技术对Ga N HEMT器件进行了大信号参数的提取,运用ADS软件进行了匹配电路的设计,对功率放大器的性能指标进行了优化,并基于LTC4440和n MOS器件设计了高压脉冲调制电路。研制结果表明,该模块在400 MHz工作带宽内(相对带宽100%)的输出功率为46.6 d Bm(45.7 W),功率增益为36.6 d B,功率附加效率(PAE)为40.4%,杂波抑制为65.7 d Bc,脉冲顶降为0.4 d B,脉冲上升时间为75 ns,脉冲下降时间为50 ns,模块尺寸为50 mm×40 mm×20 mm。
基金sponsored by the National Natural Science Foundation of China (40730318 and 40574019)the key project of social welfare of the Ministry of Science and Technology,PRC(2005DIA3J117) +1 种基金seismic industry research project (200808002)basic scientific research of Institute of Geophysics CEA(DQJB07A01) ,China
文摘The air-gun source has important applications as a new, environmentally, green active source in regional scale deep exploration. In the past, the air gun source was used mainly in smallscale, high-resolution shallow oil exploration, but has a lack of adequate research in deep exploration. In order to study the selection of work parameters and field conditions of the air gun source in deep exploration, this paper does the following work： （1） analyze the characteristics of the air gun source using air gun experiments; （2） simulate the air gun signal and air gun-array signal based on the theory of free bubble oscillation to analyze the influence of bubble oscillation and study the wavelet energy and spectrum characteristics needed in deep exploration; （3） on the basis of theoretical simulation, study the influence of work parameters, such as air-gun capacity, work stress and depth on air gun signal and analyze the influence of air-gun array inspired moment and spacing of different air guns on air gun-array signals; and （4） study energy reflection and transmission coefficients for different underwater interfaces, which is very useful for choosing suitable field conditions.
基金Supported by the National High Technology Research and Development Program of China(“863”ProgramNo.2015AA01A703)
文摘A 130 nm CMOS complementary-conducting-strip transmission line(CCS-TL)based multi-stage amplifier beyond 100 GHz was presented in this paper. Different structural parameters were investigated to achieve higher quality factor for the matching circuits. Moreover, CCS-TL based Marchand balun was implemented to achieve higher output power. The measured small signal gain was higher than 5 d B from 101 GHz to 110 GHz. DC power consumption was 67.2 mW with V_D=1.2 V, and the chip size including contact PADs was 1.12 mm×0.81 mm.
