A method and device for measuring the length of a radio frequency transmission line

Abstract

The invention discloses a method and a device for measuring the length of a radio frequency transmission line. The method comprises the following steps of establishing the connection between a presetport and one end of a first radio frequency transmission line, and keeping the other end of the first radio frequency transmission line in an open circuit state; generating an excitation signal, and separating the excitation signal into a first signal and a second signal through a signal separator, wherein the first signal is a reference signal; transmitting the second signal to the first radio frequency transmission line, and receiving a test signal through a directional coupler, wherein the second signal is transmitted in the first radio-frequency transmission line and then is totally reflected through the other end of the first radio-frequency transmission line so as to form the test signal; comparing the phase difference between a reference signal and the test signal; according to thephase difference, measuring to obtain a physical length value of the first radio frequency transmission line, wherein a transmission time delay value is met. For a radio frequency transmission line which is not well manufactured, the length of the manufactured radio frequency transmission line can be ensured to be more accurate. Meanwhile, the time delay precision of the manufactured radio frequency transmission line can be effectively ensured.

Description

technical field [0001] The present application relates to the field of electromagnetic signal testing, in particular to a method and equipment for measuring the length of a radio frequency transmission line. Background technique [0002] With the development of Internet technology and communication technology, the electronic product industry has developed rapidly. In order to meet the needs of different users, electronic products have more and more functions, and the requirements for signal transmission performance of electronic products are also getting higher and higher. Data exchange or signal interaction between different electronic products is carried out through the transmission line, and the requirements for the performance of the transmission line are correspondingly more and more stringent. [0003] However, due to the correlation between the length of the radio frequency transmission line and the signal transmission delay, it is time-consuming and labor-intensive ...

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Problems solved by technology

[0004] In view of this, the embodiment of the present application provides a method and device for measuring the length of a radio frequency transmission line, which is used to solve the problem that the radio frequency transmission line produced in the prior art cannot meet the delay requirement

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