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公开(公告)号：US20220317242A1
公开(公告)日：2022-10-06
申请号：US17638476
申请日：2020-04-02
Applicant: Google LLC
Inventor： Jiang Zhu , Xuanke He , Wenjing Su
Abstract: Various arrangements for remote sensing using cross-circular polarization are presented. In some embodiments, an RFID (Radio Frequency Identification) emitter is present that emits circular-polarized RF (Radio Frequency) waves having a first polarization. A circular-polarized passive RFID tag may be present that is configured to receive, modulate, and output circular-polarized RF waves that have a second polarization opposite from the first polarization.
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