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Device and method for judging near field distance

A near-field distance and judging device technology, applied in measurement devices, instruments, and re-radiation, etc., can solve problems such as high system requirements, weak anti-interference ability, and large amount of mathematical calculation, achieving simple calculation process and simple device setup. , the effect of a small amount of calculation

Active Publication Date: 2014-06-18
NATIONZ TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this method is that the amount of mathematical calculation is very large, the system requirements are very high, especially the key problem of weak anti-interference ability: when there is an interference object between the signal source and the receiving device, the signal reflection occurs, and the phase will appear 180 degree inversion, this phase inversion will cause signal source location failure
For such problems, the GPS system often needs to adopt complex measures to prevent multipath interference to reduce its impact on the system, which often brings more complex system design requirements

Method used

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  • Device and method for judging near field distance
  • Device and method for judging near field distance
  • Device and method for judging near field distance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Figure 4 It is a schematic diagram of the antenna distribution of the UHF antenna array unit 1 in Embodiment 1 of the near-field distance judging device of the present invention. Such as Figure 4 As shown, UHF antenna array unit 1 includes 4 sets of positioning antenna pairs (ANT1, ANT3), (ANT3, ANT7), (ANT7, ANT5), (ANT5, ANT1) and 4 sets of height-fixed antenna pairs in the same plane (ANT1, ANT2), (ANT3, ANT4), (ANT5, ANT6), (ANT7, ANT8); Antennas ANT1, ANT3, ANT5, and ANT7 are respectively used for 2 sets of positioning antenna pairs and 1 set of height-fixing antenna pairs. ANT2, ANT4, ANT6, and ANT8 are only used for one set of height-fixed antenna pairs; positioning antenna pairs (ANT1, ANT3), (ANT3, ANT7), (ANT7, ANT5), (ANT5, ANT1) between the two antennas The center line of the connection intersects at one point the extension line of the connection between the two antennas of the fixed-height antenna pair (ANT1, ANT2), (ANT3, ANT4), (ANT5, ANT6), (ANT7, AN...

Embodiment 2

[0086] Figure 10 It is a schematic diagram of the antenna distribution of the UHF antenna array unit 1 in the second embodiment of the near-field distance judging device of the present invention. Such as Figure 10 As shown, the UHF antenna array unit 1 includes 3 sets of positioning antenna pairs (ANT3, ANT4), (ANT7, ANT8), (ANT9, ANT10) and 3 sets of height-fixed antenna pairs (ANT1, ANT2) in the same plane, (ANT5, ANT6), (ANT11, ANT12); Antennas ANT3, ANT4, ANT7, ANT8, ANT9, ANT10 are only used for 1 pair of positioning antennas, and antennas ANT1, ANT2, ANT5, ANT6, ANT11, ANT12 are used for 1 pair respectively. The use of fixed-height antenna pairs; positioning antenna pairs (ANT3, ANT4), (ANT7, ANT8), (ANT9, ANT10) The midline of the connection between the two antennas, and the fixed-height antenna pair (ANT1, ANT2), ( The extension line between the two antennas of ANT5, ANT6), (ANT11, ANT12) intersects at one point; locate the line connecting the midpoint of the anten...

Embodiment 3

[0090] Figure 11 It is a schematic diagram of the antenna distribution of the UHF antenna array unit 1 in Embodiment 3 of the near-field distance judging device of the present invention. Such as Figure 11As shown, UHF antenna array unit 1 includes 4 sets of positioning antenna pairs (ANT3, ANT4), (ANT7, ANT8), (ANT9, ANT10), (ANT13, ANT14) and 4 sets of height-fixed antenna pairs (ANT1, ANT2) , (ANT5, ANT6), (ANT11, ANT12), (ANT15, ANT16); Antennas ANT3, ANT4, ANT7, ANT8, ANT9, ANT10, ANT13, ANT14 are only used for one pair of positioning antennas, and antennas ANT1, ANT2, ANT5, ANT6, ANT11, ANT12, ANT15, and ANT16 are only used for one set of fixed-height antenna pairs; The midline of the connection line between the two antennas intersects the extension line of the connection line between the two antennas of the height-fixed antenna pairs (ANT1, ANT2), (ANT5, ANT6), (ANT11, ANT12), (ANT15, ANT16) at One point; the line connecting the middle points of positioning antenna ...

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Abstract

The invention relates to a device and method for judging near field distance, which are used for judging near field distance of a UHF (Ultra-High Frequency) signal source. According to the invention, a signal emitted from the UHF signal source is received through a UHF antenna array unit, the received signal is subjected to phase difference detection through a phase difference detection unit and then converted to phase information which is recognizable to a distance judgment algorithm operational unit, and the distance judgment algorithm operational unit is used for calculating the received phase information to obtain the distance between the signal source and the UHF antenna array unit, wherein the UHF antenna array unit consists of at least 3 groups of antenna pairs which are distributed regularly in the case of meeting certain conditions, thereby the calculation of the distance judgment algorithm operational unit is greatly simplified.

Description

technical field [0001] The present invention relates to a system and method for judging the distance of a radio frequency signal source in radio frequency communication, and more specifically, relates to a distance judging device and method applied to fields such as mobile payment that require near-field distance judgment. Background technique [0002] Radio frequency communication terminals, especially mobile phones, have been popularized. There is an increasing demand to enable radio frequency communication terminals to have short-range communication functions through transformation, and to use radio frequency communication terminals such as mobile phones to realize functions such as electronic payment. At present, there has been a method of adding a radio frequency function to the SIM (Subscriber Identity Module) card in the mobile phone, called a radio frequency SIM, or adding a short-range communication module on the main board of the mobile phone to realize the short-d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S11/02
Inventor 彭波章伟余运波
Owner NATIONZ TECH INC