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Proximity detection using calculated voltage standing wave ratio readings

A voltage standing wave ratio and proximity technology, applied in radio wave measurement systems, circuits, measurement devices, etc., can solve the problems of unsatisfactory sensor accuracy, increased manufacturing costs, and consumption of valuable space for user equipment.

Pending Publication Date: 2022-01-18
GOOGLE LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Leveraging proximity sensors in UEs can increase manufacturing costs and consume valuable real estate on user equipment
Also, the accuracy of this proximity sensor is not ideal

Method used

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  • Proximity detection using calculated voltage standing wave ratio readings
  • Proximity detection using calculated voltage standing wave ratio readings
  • Proximity detection using calculated voltage standing wave ratio readings

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0098] Example 1: A method for proximity detection of objects in the near-field region of the electromagnetic field of a millimeter-wave transmit antenna array (204; 304; 404) formed by a plurality of millimeter-wave antenna elements (205; 308; 408) , the method includes: generating (502; 602) forward signals transmitted by a plurality of antenna elements; generating beamforming weights by a controller (212; 312; 412); applying beamforming weights to the signal to generate a weighted forward signal; measuring (506; 604) the power of the weighted forward signal by at least one voltage standing wave ratio detector (210; 310; 410) coupled to the transmit antenna array; transmitting weighting the forward signal; measuring (506; 604) the power of the reflected signal by at least one VSWR detector; calculating (508; 508; 606) voltage standing wave ratio; detecting (510; 608) a change in voltage standing wave ratio by iteratively measuring the subsequent weighted forward signal, meas...

example 2

[0099] Example 2: The method of Example 1, wherein the measurement of the power of the weighted forward signal is performed by a separate voltage standing wave ratio detector (310-1; 310-2; 310- n) proceed.

example 3

[0100] Example 3: The method of any preceding example, wherein calculating the VSWR further comprises calculating, by at least one VSWR detector (210; 310; 410), a plurality of VSWRs on the plurality of antenna elements to Determine the proximity of objects.

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PUM

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Abstract

The present disclosure describes methods, devices, systems, and procedures for detecting a proximity of an object (301) in a near-field region of an electromagnetic field of a transmitting antenna array (204; 304; 404) using a voltage standing wave ratio (VSWR). In aspects, a forward signal for transmission by the antenna elements (308) is generated, at least one VSWR detector (210; 310) coupled to the antenna array (204; 304; 404) measures a power of the forward signal, the forward signal is transmitted, the at least one VSWR detector (210; 310) measures a power of a reflected signal, and the VSWR detector (210; 310) calculates a VSWR. Detected changes in the calculated VSWR are then utilized to detect object (301) proximity in the near-field region. Beamforming weights may be applied to the forward signal and a machine-learned model can be utilized to detect object (301) proximity in the near-field region.

Description

Background technique [0001] User equipment, such as a smartphone, may include an antenna module including a transceiver module and a plurality of antenna elements arranged in one or more antenna arrays. A transceiver module may include one or more transceivers. The transceiver modules are connected to the antenna elements by radio frequency (RF) conductors. [0002] To improve power transfer between the transceiver and its load (eg, antenna), the specified load impedance of the transceiver is matched to the combined input impedance of the antenna (eg, antenna element) and RF conductor. Reflected power (return loss) is minimized through impedance matching, enabling efficient power transfer between the transceiver and the antenna. [0003] The vicinity of the electromagnetic field around the transmitting antenna is called the near-field region. In the near-field region, the absorption of radiation by objects affects the loading of the transceiver. For example, the presence o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/24G01S7/02G01S7/06G01S13/00G01S13/34G01S13/42H01Q3/26H01Q3/40
CPCH01Q1/242H01Q3/2611H01Q3/2605H01Q3/40G01S11/02G01S7/03G01S7/417G01S13/04H01Q3/267H01Q3/36
Inventor 王继兵埃里克·理查德·施陶费尔阿米尔·阿克拉姆
Owner GOOGLE LLC