SATO has been granted a patent for a wireless electromagnetic coupler arrangement that provides spatial selectivity in interaction with an RF terminated planar metallic trace. The arrangement includes a sequential array of coupling elements and switchable resistor elements for efficient coupling of electromagnetic energy. GlobalData’s report on SATO gives a 360-degree view of the company including its patenting strategy. Buy the report here.

According to GlobalData’s company profile on SATO, Contactless verification was a key innovation area identified from patents. SATO's grant share as of January 2024 was 29%. Grant share is based on the ratio of number of grants to total number of patents.

Wireless electromagnetic coupler arrangement for spatial selectivity in interaction

Source: United States Patent and Trademark Office (USPTO). Credit: SATO Holdings Corp

A recently granted patent (Publication Number: US11861445B2) discloses a wireless electromagnetic coupler arrangement designed to provide spatial selectivity in interaction with an RF terminated planar metallic trace of arbitrary geometric shape using electromagnetic energy. The arrangement includes a sequential array of coupling elements shunted onto a differential transmission line, with switchable resistor elements in the paths between the transmission line and each coupling element. These resistor elements can be switched between two values, with feedback loops and harvester elements associated with each coupling element for energy collection and feedback control.

Furthermore, the electromagnetic coupler arrangement features an interrogator for feeding electromagnetic energy to be coupled to the metallic trace, along with a balun for splitting the output of the interrogator. The interrogator is capable of feeding unmodulated electromagnetic energy initially, followed by modulation for communication purposes. The arrangement also includes various configurations for the coupling elements, such as transmission line loops and elongated spiral patterns, allowing for inductive coupling with the metallic trace. Additionally, the patent covers the adaptation of the arrangement for encoding RFID inlays by coupling electromagnetic power to them, as well as the inclusion of feedback loops with inverting operational amplifiers. An RFID printer/encoder incorporating this electromagnetic coupler arrangement is also part of the patent claims.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.