rfid tag polarization wave This roly-poly effect relaxes the constraint on a mutual tag-reader orientation, including the polarization mismatch, and provides next to perfect long-range operation.
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This roly-poly effect relaxes the constraint on a mutual tag-reader orientation, .
Metrics - Self-aligning roly-poly RFID tag | Scientific Reports - Nature
Full Size Table - Self-aligning roly-poly RFID tag | Scientific Reports - Nature
Full Size Image - Self-aligning roly-poly RFID tag | Scientific Reports - NatureRFID tag with electromagnetic wave polarization diversity Abstract: The paper presents a . This roly-poly effect relaxes the constraint on a mutual tag-reader orientation, including the polarization mismatch, and provides next to perfect long-range operation.RFID tag with electromagnetic wave polarization diversity Abstract: The paper presents a solution to the interference of incident and reflected waves in backscattering RFID systems. The concept is validated using microstrip patch antennas and a FR-4 double clad substrate.
The choice between circular polarization antennas and linear polarization antennas can make a significant difference in an RFID system. Linear polarization occurs when electromagnetic waves broadcast on a single plane (either vertical or horizontal). Linear polarized antennas must have a known RFID tag orientation and the RFID tag must be fixed .In this paper, we argue that a new form of software-controlled polarization brings important benefits to the tasks of powering, communicating with, and localizing RFID tags. Using only two linearly polarized antennas, we demonstrate how one could generate an arbitrarily linear po-larization in the same plane relying entirely on software control.
Two antennas provide polarization diversity for reading an RFID tag that a single antenna is not able to read due to the tag orientation. Many of the above issues associated with conventional patch antennas are overcome by the specially designed Wave® antenna as described previously and shown below. A frequency selective surface (FSS) based chipless RFID tag is designed at mm-Wave range. It is shown that the proposed design methodology can provide a multiresonant cross polar spectral signature while exhibiting a significant Radar Cross Section(RCS).The main issues are polarization, fading, gain, EIRP (effective isotropic radiated power) and diversity. A good understanding of these issues will aid the designer in selecting the type and number of antennas, and where to put them for optimum performance.
Furthermore, the overlapping beams of the Wave® provide all 3 polarizations, whereas a patch antenna can only provide 2 at most. This makes the Wave® ideal for item-level zone coverage of densely populated regions of RFID tagged products in warehouses, retail stores, and portals.One possible solution to this problem is to change the polarity of the tag reflected wave with respect to the incident wave. This approach is illustrated in Fig. 2 for microstrip technology. The incident wave has a vertical polarization while the reflected wave has a horizontal polarization. A simple circularly polarized (CP) square loop antenna for UHF band RFID tag is proposed to overcome the polarization mismatch problem between reader antenna and tag antenna. This roly-poly effect relaxes the constraint on a mutual tag-reader orientation, including the polarization mismatch, and provides next to perfect long-range operation.
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RFID tag with electromagnetic wave polarization diversity Abstract: The paper presents a solution to the interference of incident and reflected waves in backscattering RFID systems. The concept is validated using microstrip patch antennas and a FR-4 double clad substrate. The choice between circular polarization antennas and linear polarization antennas can make a significant difference in an RFID system. Linear polarization occurs when electromagnetic waves broadcast on a single plane (either vertical or horizontal). Linear polarized antennas must have a known RFID tag orientation and the RFID tag must be fixed .
In this paper, we argue that a new form of software-controlled polarization brings important benefits to the tasks of powering, communicating with, and localizing RFID tags. Using only two linearly polarized antennas, we demonstrate how one could generate an arbitrarily linear po-larization in the same plane relying entirely on software control.
Two antennas provide polarization diversity for reading an RFID tag that a single antenna is not able to read due to the tag orientation. Many of the above issues associated with conventional patch antennas are overcome by the specially designed Wave® antenna as described previously and shown below.
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A frequency selective surface (FSS) based chipless RFID tag is designed at mm-Wave range. It is shown that the proposed design methodology can provide a multiresonant cross polar spectral signature while exhibiting a significant Radar Cross Section(RCS).The main issues are polarization, fading, gain, EIRP (effective isotropic radiated power) and diversity. A good understanding of these issues will aid the designer in selecting the type and number of antennas, and where to put them for optimum performance.Furthermore, the overlapping beams of the Wave® provide all 3 polarizations, whereas a patch antenna can only provide 2 at most. This makes the Wave® ideal for item-level zone coverage of densely populated regions of RFID tagged products in warehouses, retail stores, and portals.One possible solution to this problem is to change the polarity of the tag reflected wave with respect to the incident wave. This approach is illustrated in Fig. 2 for microstrip technology. The incident wave has a vertical polarization while the reflected wave has a horizontal polarization.
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