Journal: Scientific Reports

Article Title: Miniaturization limits of ceramic UHF RFID tags

doi: 10.1038/s41598-025-88051-y

Figure Lengend Snippet: Operational scheme of a miniature ceramic-based RFID tag. Displacement currents in the high-Q resonator are inductively coupled to a metal split ring integrated with an RFID chip. Miniaturization and extended reading range are achieved through localized magnetic dipole mode TE 01 within high-permittivity ceramics. The inset illustrates the structural elements of the tag and the magnetic field distribution at the operating frequency.

Article Snippet: Figure d shows the dependence of the real and imaginary parts of the optimized impedance together with the complex-conjugated impedance of the Impinj Monza R6 RFID chip.

Techniques:

Journal: Scientific Reports

Article Title: Miniaturization limits of ceramic UHF RFID tags

doi: 10.1038/s41598-025-88051-y

Figure Lengend Snippet: ( a ) The equivalent circuit of the ceramic tag. ( b ) The geometry of the impedance matching. The split ring with an IC is adjusted to the high-index ceramic resonator. ( c ) Smith chart, demonstrating the procedure of the tag impedance matching. Blue line—an initial random set of the ring parameters; red line—the optimized set. RFID frequency band (915-917 MHz) is highlighted in bold. ( d ) Real and imaginary impedance parts of the optimized tag model (blue and red lines). Dashed green and magenta-the complex-conjugate impedance value of the Impinj Monza R6 RFID chip (taken from its datasheet). Vertical dashed line—the impedance matching condition.

Article Snippet: Figure d shows the dependence of the real and imaginary parts of the optimized impedance together with the complex-conjugated impedance of the Impinj Monza R6 RFID chip.

Techniques:

Journal: Scientific Reports

Article Title: Miniaturization limits of ceramic UHF RFID tags

doi: 10.1038/s41598-025-88051-y

Figure Lengend Snippet: ( a ) Geometry of a dielectric RFID tag used for impedance matching. Numerically calculated modulus of the reflection coefficient (|S 11 |) in dB (impedance matching) for different parameters - wire thickness ( b ), the height of the ring above the resonator ( c ), the radius of the ring ( d ), and the displacement of the ring relative to the central axis of the resonator ( e ). Optimized geometry is shown with red color in each panel.

Article Snippet: Figure d shows the dependence of the real and imaginary parts of the optimized impedance together with the complex-conjugated impedance of the Impinj Monza R6 RFID chip.

Techniques:

Journal: Scientific Reports

Article Title: Miniaturization limits of ceramic UHF RFID tags

doi: 10.1038/s41598-025-88051-y

Figure Lengend Snippet: Exploring miniaturization limits with ceramic RFID tags. ( a ) Numerical model of ceramic RFID tag miniaturization with dielectric permittivity increase. ( b ) Resonator volume as a function of its dielectric permittivity–tags are from panel ( a ). ( c ) Bandwidth as a function of the resonator’s permittivity. Loss tangents are in the legends. ( d ) Tag’s antenna realized gain as the function of the dielectric permittivity of the resonator. ( e ) |S 11 |-parameter spectra for analyzed tags.

Article Snippet: Figure d shows the dependence of the real and imaginary parts of the optimized impedance together with the complex-conjugated impedance of the Impinj Monza R6 RFID chip.

Techniques: