本文基于长线理论用同轴线测量装置模拟弹体天线的输入阻抗值，使引信在同轴线测量装置中其工作状态和自由空间一样。

The axial cavum measurement device was used to simulate the input impedance of the body antenna based on the theory of long line.

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根据基本声学理论，分析具有单极子、中间和偶极子三种指向性的有限长线声源的几何发散损失特性。

Based on the theory of acoustics, this paper analyzes the character of geometrical spreading loss of finite line sound source on three types of directivity-monopole, intermediate pole and dipole.

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文中给出了长线“频域测试法”的理论分析和测试实例。

Besides the theory of test means frequency domain, a test example is illustrated in the text.

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