绝对常数是固定而不可以改变的。
介电常数虚部大（绝对值），而且包层模序也大时，损耗较大。
The loss is greater when the imaginary part of the complex dielectric constant is bigger and the mode order is higher.
为全面实现以上原则通过理论分析指出采用偏差输入将优于采用绝对值输入；采用时间常数可变的时限电路将优于采用平方电路。
It proves that it is superior to use the "deviation input" to the "absolute-value input" and better to use time circuit with variable time constant than to use square circuit.
如定义：“平面内到两个定点的距离的差的绝对值等于常数的点的轨迹是双曲线。”
If the definition: "the plane's two fixed-point distance of the poor in absolute terms equal to the constant point of the track is hyperbolic."
如定义：“平面内到两个定点的距离的差的绝对值等于常数的点的轨迹是双曲线。”
If the definition: "the plane's two fixed-point distance of the poor in absolute terms equal to the constant point of the track is hyperbolic."
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