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Tracking Spatial Placement of HF RFID-Tagged Objects on a Surface Using Multiple Receive Antennas

A technology of receiving antennas, objects, applied in the field of spatial placement using multiple receiving antennas to track HF RFID tag objects on a surface, which can solve problems such as hindering constant energy capture, slow detection loops, loss of power, etc.

Active Publication Date: 2021-11-05
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the system switches to another antenna, the HF RFID tag objects on the previous antenna lose power (i.e., are deactivated)
As a result of switching transmit antennas on the fly, the detection loop can be slow as the detection loop must reactivate the HF RFID tag object each time the antenna is switched on
Furthermore, this prevents constant energy capture from the reader's RF field

Method used

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Embodiment Construction

[0024] Representative devices and methods according to the present application are described in this section. These examples are provided merely to add context and to aid in understanding the described embodiments. It will therefore be apparent to one skilled in the art that the described embodiments may be practiced without some or all of these specific details. In other instances, well known process steps have not been described in detail in order to avoid unnecessarily obscuring the described embodiments. Other embodiments are possible, so the following examples should not be considered limiting.

[0025] In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration specific embodiments in accordance with the described embodiments. While these embodiments have been described in sufficient detail to enable those skilled in the art to practice the described embodiments, it is to...

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Abstract

The present invention discloses an apparatus configured for tracking the spatial placement of one or more HF (High Frequency) RFID (Radio Frequency Identification) tagged objects on a surface. The device includes an HF RFID reader, a transmit antenna and a plurality of receive antennas. The transmit antenna efficiently transmits power and data across an area defined as a detection surface. Each of the plurality of receive antennas is capable of efficiently receiving data from a separate portion of the detection surface, while all of the plurality of receive antennas together are capable of efficiently receiving data from substantially all of the detection surface. In one embodiment, the transmit antenna transmits power constantly.

Description

technical field [0001] The described embodiments relate generally to apparatus and methods for providing tracking of RFID (Radio Frequency Identification) tagged objects, and more particularly to providing tracking of the spatial placement of HF RFID tagged objects on surfaces using multiple receive antennas devices and methods. Background technique [0002] RFID (Radio Frequency Identification) applications sometimes require the ability to detect the location of an RFID-tagged object on the face of an RFID reader. To address this requirement, typically HF (High Frequency) RFID readers use multiple antennas as an example, where each individual antenna has an RF (Radio Frequency) field and data transmission to / from the HF RFID tag object Perform both functions of data reception. For example, if a user wants to detect HF RFID tag objects at 10 different surface locations, 10 transmit / receive antennas would be used, where each antenna represents a physical location. Switchin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B5/00
CPCG01S5/02213H04B5/263H04B5/77G06F3/046G06K7/10158G06K7/10356G01S5/0294
Inventor 彼得·皮尔茨切沃克·巴巴拉克
Owner NXP BV