基于Ga As单片集成电路工艺,对接收通道的关键元器件低噪声放大器和电调衰减器进行了芯片化设计。采用基于多层高温共烧陶瓷埋线工艺设计的金属化陶瓷外壳,对接收通道进行了微组装。测试结果表明,该S波段接收通道接收动态范围大于60 d B...基于Ga As单片集成电路工艺,对接收通道的关键元器件低噪声放大器和电调衰减器进行了芯片化设计。采用基于多层高温共烧陶瓷埋线工艺设计的金属化陶瓷外壳,对接收通道进行了微组装。测试结果表明,该S波段接收通道接收动态范围大于60 d B,增益大于95 d B,噪声系数小于1.3 d B,本振抑制大于30 d Bc,中频信号的谐波抑制大于30 d Bc。当中频自动增益控制电路起控时,接收通道输出功率稳定在(2±0.5)d Bm。该接收通道采用+5 V供电,工作电流小于250 m A。整个接收通道的尺寸仅为20 mm×13.8 mm×5.75 mm,其性能优异且集成度非常高,小型化优势非常明显。展开更多
In many clinical studies it is important to examine whether or not the effect of the treatment varies across patient subgroups [1].For example,does the effect of treatment for depression with a specific SSRI vary by g...In many clinical studies it is important to examine whether or not the effect of the treatment varies across patient subgroups [1].For example,does the effect of treatment for depression with a specific SSRI vary by gender? In other words,is there ’heterogeneity of treatment effects’ (HTE)? This information is important for clinical decision-making;clinicians can target a specific treatment to patients who are expected to benefit most from the treatment and seek alternative treatments for patients who are expected to展开更多
文摘基于Ga As单片集成电路工艺,对接收通道的关键元器件低噪声放大器和电调衰减器进行了芯片化设计。采用基于多层高温共烧陶瓷埋线工艺设计的金属化陶瓷外壳,对接收通道进行了微组装。测试结果表明,该S波段接收通道接收动态范围大于60 d B,增益大于95 d B,噪声系数小于1.3 d B,本振抑制大于30 d Bc,中频信号的谐波抑制大于30 d Bc。当中频自动增益控制电路起控时,接收通道输出功率稳定在(2±0.5)d Bm。该接收通道采用+5 V供电,工作电流小于250 m A。整个接收通道的尺寸仅为20 mm×13.8 mm×5.75 mm,其性能优异且集成度非常高,小型化优势非常明显。
文摘In many clinical studies it is important to examine whether or not the effect of the treatment varies across patient subgroups [1].For example,does the effect of treatment for depression with a specific SSRI vary by gender? In other words,is there ’heterogeneity of treatment effects’ (HTE)? This information is important for clinical decision-making;clinicians can target a specific treatment to patients who are expected to benefit most from the treatment and seek alternative treatments for patients who are expected to
