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所在平台: Udemy |
课程主页: https://www.udemy.com/course/microwave-measurement/
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这门名为“微波测量系统”的课程探讨了与电磁频谱中的其他部分不同的微波频率范围的特性。在微波频率下，波长非常短，传统的低频电路理论（基于电压和电流）不再适用。因此，微波测量需要专门的设备和技术。 课程重点介绍了用于测量微波参数（如频率、衰减、电压驻波比 (VSWR)、相位和阻抗）的关键仪器，包括网络分析仪、频谱分析仪和功率计。鉴于这些仪器的成本高昂，本课程还介绍了如何在实验室中使用微波测试平台进行参数测量。 该课程详细阐述了微波测试平台的构建和使用。测试平台的核心是一个 1 kHz 方波信号源，该信号经过调制，并在测试平台的末端通过探测器进行校准。探测器的输出连接到阴极射线示波器，用于观察测试信号的行为。此外，课程还介绍了带有探头小车的槽线段（slotted section）的应用，它可以用来检测测试信号，并将其显示在示波器上，或者用于测量电压驻波比。 最终，课程强调了利用测试信号的幅度和相位信息来进行各种微波参数的测量。
In general microwave are considers as different from Electromagnetic spectrum. Since wave propagation takes place at microwave frequency has very small wave. The microwave measurement carried at different microwave range. At low frequency, the circuit theory is used to measure the signal frequency components in terms of voltage and current. But at high frequency parameters like frequency, attenuation, voltage standing wave ratio, phase, and impedance are not calculated using voltage and current. Therefore, microwave bench is used for measurement of microwave parameter. The instruments that measure the parameter at microwave frequency are network analyzer, Spectrum analyzer, power meter, etc. The cost of these devices are very high, therefore in laboratory parameters measurement can be done using microwave bench with the help of test signal. The test signal is used at microwave measurement is of 1 KHz square wave signal. This signal is modulated using source and calibrated at the end of bench connected with detector. The detector output is connected to the cathode ray oscilloscope to observe the behavior of the test signal. The Slotted section with probe carriage is used to detect these test signal at cathode ray oscilloscope or voltage standing wave ratio detector. The amplitude and phase information of the test signal are used for measurement of microwave parameter.
