Standing wave ratio measurement method and apparatus

Abstract

The invention is applicable to the technical field of mobile communication and provides a method and a device which are used for measuring standing wave ratio. The standing wave ratio measuring device comprises the following components: a coupler, which is used for obtaining an incident signal and a reflected signal; an attenuator, which is used for adjusting the incident signal and the reflectedsignal that are obtained by the coupler within a linear range of a logarithmic detector; the logarithmic detector, which is used for respectively converting the incident signal and the reflected signal that are adjusted by the attenuator to corresponding analog direct-current voltage signals; an analog-to-digital converter, which is used for respectively converting the corresponding analog direct-current voltage signals of the incident signal and the reflected signal that are converted by the logarithmic detector to corresponding digital direct-current voltage signals; a processor, which is used for modifying the isolation degree of the coupler according to a voltage differential value of the corresponding digital direct-current voltage signals of the incident signal and the reflected signal; and the standing wave ratio is calculated according to the corresponding digital direct-current voltage signals of the incident signal and the reflected signal that are obtained by the modification. The method and the device which are used for measuring the standing wave ratio effectively lower the influence of the coupler directivity to measuring results and improve detecting precision undera certain directivity situation.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a standing wave ratio measuring method and device. Background technique [0002] In the field of wireless communication, the standing wave ratio of a port is an important index for the effective transmission of radio frequency signals. At present, the commonly used method is to use a directional coupler to extract the incident power and reflected power of the transmission port respectively, and convert the incident power and reflected power into corresponding DC voltages through a power conversion device, thereby calculating the port standing wave ratio and the maximum value of the voltage The ratio to the minimum is the standing wave ratio (VSWR). [0003] However, using the above-mentioned traditional method to calculate the port standing wave ratio, since the isolation of the directional coupler is limited, the error caused by the directivity of the d...

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Problems solved by technology

Therefore, the application of this traditional method has certain limitations

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