Multi-system access platform voltage standing wave ratio detection method and device
A standing wave ratio detection, voltage standing wave ratio technology, applied in the direction of measuring devices, transmission systems, electrical components, etc., can solve the problems of no detection, difficult to accurately detect, etc., to achieve low cost, high reliability, high detection accuracy Effect
Active Publication Date: 2019-03-15
深圳国人无线通信有限公司
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Problems solved by technology
Coexistence of 2G, 3G and 4G, co-construction and coexistence of various coverage systems, extensive use of broadband antennas, status detection of antennas and feeders, especially voltage standing wave ratio is an important indicator of a system antenna matching, POI (Point of interface) as One of the solutions for indoor coverage has the advantages of high reliability and economy. In order to understand the working status of the broadband antenna in the POI system in real time, in the POI system, it is required to detect the voltage standing wave ratio of each frequency band of the antenna. The current general technology It can meet the overall voltage standing wave ratio detection requirements of the antenna, but there is no device to detect the voltage standing wave ratio state of each frequency band of the broadband antenna. At the same time, couplers and other radio frequency devices have large differences in different frequency bands and different temperatures. difficult to detect accurately
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[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0040] refer to figure 1 and figure 2 , a multi-system access platform voltage standing wave ratio detection device provided by the present invention includes a broadband coupling circuit 11, an input radio frequency switch combination 12, a radio frequency filter circuit 16, an output radio frequency switch combination 26, a radio frequency amplifier circuit 27, and a power detection circuit 30. Operational amplification circuit 31 , analog-to-digital conversion circuit 32 , single-chip microcomputer 33 , temperature sensor 35 and memory 34 . The broadband coupling circuit 11 is connected to one end of the input radio frequency switch combination 12, the other end of the input radio frequency switch combination 12 is connected to one end of the radio frequency filter circuit 16, and the other end of the radio frequency filter circuit 16 is connected ...
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The present invention relates to a voltage standing wave ratio detection method and device for a point of interface. The method comprises the following steps: coupling bandwidth signals; selecting, from the signals, a forward coupling signal having a frequency band to be measured and outputting the same; performing band-pass filtering processing on the forward coupling signal, to obtain a corresponding narrowband signal; selecting the narrowband signal and outputting the same; performing detection on the narrowband signal to form a voltage signal; performing amplification and filtering on the voltage signal; performing analog-to-digital conversion on the amplified and filtered voltage signal; looking up the digital voltage signal in a preset power table of narrowband signals, to calculate a forward power value; selecting a reverse coupling signal and outputting the same, repeating the foregoing steps to obtain a reverse power value, and performing calculation on the basis of the forward power value and the reverse power value to obtain a voltage standing wave ratio; and polling the next forward coupling signal and reverse coupling signal having frequency bands to be measured, to obtain a corresponding voltage standing wave ratio. The present invention can detect a voltage standing wave ratio of a wideband antenna in sections, achieving high integration and having a low cost.
Description
【Technical field】 [0001] The present invention relates to the technical field of wireless communication, in particular to a method and device for detecting the segmental voltage standing wave ratio of a broadband antenna of a multi-system access platform. 【Background technique】 [0002] At present, modern mobile communication has developed from 2G to 4G. Coexistence of 2G, 3G and 4G, co-construction and coexistence of various coverage systems, extensive use of broadband antennas, status detection of antennas and feeders, especially voltage standing wave ratio is an important indicator of a system antenna matching, POI (Point of interface) as One of the solutions for indoor coverage, which has the advantages of high reliability and economy. In order to understand the working status of the broadband antenna in the POI system in real time, in the POI system, it is required to detect the voltage standing wave ratio of each frequency band of the antenna. The current general techn...
Claims
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IPC IPC(8): H04B1/00H04B1/04H04B1/12G01R27/06
CPCG01R27/06H04B1/0017H04B1/006H04B1/04H04B1/126H04B2001/0416
Inventor 李勇军吴四维
Owner 深圳国人无线通信有限公司