A highly compact chipless tag based on Frequency coding technique using Spiral Resonators is proposed in this paper.Spirals are well known metamaterial structures and thus capable of sharp resonance,and hence Spiral R...A highly compact chipless tag based on Frequency coding technique using Spiral Resonators is proposed in this paper.Spirals are well known metamaterial structures and thus capable of sharp resonance,and hence Spiral Resonators can serve as a good candidate for RF Identity Tags.The bit capacity of the proposed tag is 10 bits per sqcm.The prototype of the tag is fabricated on a low-cost substrate of dielectric constant 4.4 and loss tangent 0.02.The overall dimension of tag is 15.4 x 3 x 1.6mm3.Two methods for reading the tags are also discussed in this paper.Scope for bit enhancement is also provided.展开更多
The comparison of the low temperature sintering and the microwave dielectric properties of Li_(2)MgSiO_(4)(LMS)ceramics prepared by citrate gel(CG)route and solid state(SS)ceramic route are discussed in this paper.The...The comparison of the low temperature sintering and the microwave dielectric properties of Li_(2)MgSiO_(4)(LMS)ceramics prepared by citrate gel(CG)route and solid state(SS)ceramic route are discussed in this paper.The LMS prepared using CG route sintered at 1175℃/2h hasε_(r)=5.3 and tanδ=1×10^(-3)at 9 GHz.The si ntering temperature of LMS is lowered to 950℃with the addition of 5 wt%lithium magnesium zinc borosilicate glass and hasε_(r)=5.6 and tanδ=2×10^(-3)at 9GHz.The amount of glass required to lower the sintering temperature of ceramics prepared using CG are slightly higher than that of Ss ceramic route.The LMS ceramics prepared using SS ceramic route shows excellent microwave dielectric properties with low sintering tem-perature compared to CG route.展开更多
文摘A highly compact chipless tag based on Frequency coding technique using Spiral Resonators is proposed in this paper.Spirals are well known metamaterial structures and thus capable of sharp resonance,and hence Spiral Resonators can serve as a good candidate for RF Identity Tags.The bit capacity of the proposed tag is 10 bits per sqcm.The prototype of the tag is fabricated on a low-cost substrate of dielectric constant 4.4 and loss tangent 0.02.The overall dimension of tag is 15.4 x 3 x 1.6mm3.Two methods for reading the tags are also discussed in this paper.Scope for bit enhancement is also provided.
文摘The comparison of the low temperature sintering and the microwave dielectric properties of Li_(2)MgSiO_(4)(LMS)ceramics prepared by citrate gel(CG)route and solid state(SS)ceramic route are discussed in this paper.The LMS prepared using CG route sintered at 1175℃/2h hasε_(r)=5.3 and tanδ=1×10^(-3)at 9 GHz.The si ntering temperature of LMS is lowered to 950℃with the addition of 5 wt%lithium magnesium zinc borosilicate glass and hasε_(r)=5.6 and tanδ=2×10^(-3)at 9GHz.The amount of glass required to lower the sintering temperature of ceramics prepared using CG are slightly higher than that of Ss ceramic route.The LMS ceramics prepared using SS ceramic route shows excellent microwave dielectric properties with low sintering tem-perature compared to CG route.
