Abstract
The devices used for studying matching conditions and measuring impedances at high frequencies include bridge circuits, transmission lines, and rectifying couplers with their associated accessories. The transmission line system has now come into fairly widespread use. In this method a sliding probe is used to observe the voltage waveform along the line occurring as a result of interference between two alternating voltage waves passing along the line in opposite directions. The one wave originates in the supply generator, while the other occurs by reflection at the end of the line when the terminal impedance differs from the characteristic impedance of the line. Standing waves then occur in the line, which have potential antinodes and potential nodes at an interval of half a wavelength. In order to study the matching conditions and measure unknown impedances, such a transmission line is connected between the voltage source and the system under investigation. The characteristic impedance of the transmission line must obviously be well matched to the generator output impedance in order to avoid the occurrence of new reflections at these points. Examples in which the unknown impedance is connected to the input or output of a transmission line have been described by van Hofwegen among others [1] [2].
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© 1965 Springer-Verlag Berlin Heidelberg
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Czech, J. (1965). Investigating Matching Conditions and Measuring Impedances In The USW-Band By Means of a Long Transmission Line. In: Oscilloscope Measuring Technique. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-39653-7_20
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DOI: https://doi.org/10.1007/978-3-662-39653-7_20
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