Radio frequency antenna standing wave self-detecting method and system

Abstract

The invention relates to a radio frequency antenna standing wave self-detecting method and system. The system comprises a modulator, a power amplifier, a coupler, a processor, an antenna, attenuators,logarithmic detector tubes, and ADC sampling chips; the modulator is connected with the power amplifier through a driving and amplification link matching network; the power amplifier is connected with the coupler; the coupler is connected with the antenna through a transmission link matching network; the coupler, the first attenuator, the first logarithmic detector, and the first ADC sampling chips are sequentially connected with one another; the coupler, the second attenuator, the second logarithmic detector, and the second ADC sampling chip are sequentially connected with one another; and the first ADC sampling chip and the second ADC sampling chip are connected with the processor. According to the radio frequency antenna standing wave self-detecting method and system, the detection ofcontrast transmitting power is additionally adopted, so that misjudgment due to the change of the transmitting power can be avoided; and in additional, influence caused by ambient temperature change is fully considered, and therefore, the accuracy of radio frequency echo detection is improved, and judgment on antenna states has higher precision and reliability.

Description

technical field [0001] The invention relates to the technical field of radio frequency identification, in particular to a radio frequency antenna standing wave self-detection method and system. Background technique [0002] In the field of radio frequency, the standing wave of radio frequency equipment is generally determined by the quality of the antenna. The quality and state of the antenna directly affect the performance of UHF radio frequency equipment, and even damage the UHF radio frequency equipment. The general parameters of the antenna are standing wave, gain, and direction. Since the gain and direction cannot be detected directly by the UHF device itself, and the standing wave directly determines the performance of the UHF device, it is particularly important to detect the antenna status for the UHF radio frequency device. [0003] Limited to the environmental volume factor, the main factors that cause large errors in the RF antenna standing wave detection are: en...

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Problems solved by technology

[0003] Limited to the environmental volume factor, the main factors that cause large errors in the RF antenna standing wave detection are: environmental temperature changes, which affect the measurement accuracy of components; some components have large volume and weight, occupy a large volume in the equipment, and directly affect The size of radio frequency equipment; affected by the large volume and weight of components, in the production process, it has a great impact on the welding process, which will lead to unstable consistency and cause large errors in the measurement results of different devices with the same antenna

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