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提出了一种测试任意复杂截面波导截止波长的新方法。该方法利用波导及谐振腔的有关理论，把任意复杂截面波导的截止频率测试问题转化为对波导谐振腔的测试，因而不但在测试中回避了匹配和过渡等难题，而且达到较高精度，非常适合于微波工程设计使用。还提出了对波导衰减以及模式场分布的测试方法。
A new method to test the cut-off wavelength of an arbitrary complex cross-section waveguide is proposed. This method uses the theory of waveguides and resonators to convert the cut-off frequency of any complicated cross-section waveguides into the testing of waveguides’ resonant cavity. Therefore, it not only avoids the problems of matching and transition, but also achieves high precision Suitable for microwave engineering design. A test method for the attenuation of the waveguide and the mode field distribution is also proposed.