...计后射频接收前端模块体积缩小为FR4基板设计的50% ,电磁兼容性优于FR4基板模块,增益达到67dB,噪声系数小于10dB,镜频抑制度( IMRR)大于30dB。
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准椭圆函数滤波器的传输零点，可以位于阻带内的任意位置处，这能更加灵活地对滤波器的带外抑制度进行调节，其矩形系数可以做得很高。
The transmission zeros(TZ) of Quasi-elliptic function filter could be placed in any position, so the attenuation out of band is controllable, then a high selection performance could get.
自从实行社会保障制度以来，退休老年工人的比例大大增加了。这至少部分是由该制度存在的工作抑制作用造成的。
The percentage of retired older workers has increased dramatically since the introduction of Social Security. This is at least partially the result of work disincentives in the system.
为证实这个结论，笔者以部分国家的经验证据考察了制度是如何促进或抑制了经济增长的。
To prove this conclusion, this paper examines how systems stimulate economic growth based on the experience of some countries and the historical and realistic evidence.
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