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A standing wave ratio measurement method and device

A measurement method and technology of standing wave ratio, applied in the field of communication, can solve the problems of increasing system failure points and cost overhead, extremely high requirements for forward and reverse coupling circuits, and large size of detection terminals, so as to reduce cost overhead and reduce fault points. , the effect of simplifying the system structure

Active Publication Date: 2021-03-05
ZHUHAI LIANDIAN TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

Since the forward and reverse power needs to be measured, two IC-RFID tags must be used for measurement. At the same time, the requirements for the forward and reverse coupling circuits are extremely high, so the detection terminal is relatively large in size and needs to be connected in series in the link.
This virtually increases the failure point and cost overhead of the original system

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  • A standing wave ratio measurement method and device
  • A standing wave ratio measurement method and device

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Embodiment Construction

[0019] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0020] The invention provides a standing wave ratio measuring method, comprising the steps of:

[0021] (1) When the measurement tag is in a stable state of communication, a measurement mechanism is established to control a single measurement tag to monitor the feeder loss in real time.

[0022] Since the feeder system is full of wireless signals of various standards, it will have an impact on the communication system based on measurement tags. Therefore, it is required that the measurement mechanism must be established within the stable period of RFID communication. Measurements cannot be performed. Whether it is in a stable state of communication can be determined according to the stable state of the signal sent by the measurement tag within a certain period of time. When it is in a stable state, a single measurement tag on th...

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Abstract

A standing wave ratio measurement method and device, the method includes the following steps: when the measurement tag is in a stable communication state, a measurement mechanism is established to control a single measurement tag to monitor feeder line loss in real time; when the sampling system is in a stable working state, multiple first A feeder loss value, determine the feeder loss reference value based on the first feeder loss value; with the continuation of the system running time, sample multiple second feeder loss values ​​of the system, and calculate the feeder loss based on the second feeder loss value Actual value: Calculate the antenna-feeder standing wave ratio VSWR according to the path loss difference TL between the feeder line loss reference value and the feeder line loss actual value. The present invention calculates the standing wave ratio based on the measurement data of the single-chip measurement label, reduces the failure points of the system, and reduces the cost.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a standing wave ratio measuring method and device. Background technique [0002] The full name of the standing wave ratio is the voltage standing wave ratio, referred to as VSWR or SWR, which refers to the ratio of the standing wave antinode voltage to the valley voltage amplitude, and is an important indicator used to indicate the matching degree between the antenna feeder and the base station. [0003] In the previous antenna-feeder VSWR measurement methods, the forward and reverse powers were basically measured, the return loss was calculated through the forward and reverse powers, and then the standing wave ratio was calculated through the return loss. Since the forward and reverse power needs to be measured, two IC-RFID tags must be used for measurement. At the same time, the requirements for the forward and reverse coupling circuits are extremely high, so the detectio...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/04H04W24/08
CPCH04W24/04H04W24/08
Inventor 方道奎许艺腾
Owner ZHUHAI LIANDIAN TECH CO LTD