RFID tags with double rectangular spiral antennas, system stability optimization under delayed electromagnetic interference and parasitic effects

2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS) Pub Date : 2015-12-21 DOI:10.1109/COMCAS.2015.7360367

O. Aluf

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引用次数: 1

Abstract

In this article, we discuss the crucial subject of RFID tags with double rectangular spiral antennas, system stability optimization under delayed electromagnetic interference and parasitic effects. Two antennas are connected in series by microstrip line with parasitic effects. We define V₁(t) as the voltage on the first antenna inductance and V₂(t) as the voltage on the second antenna inductance. Due to electromagnetic interference there are differences in time delays, with respect to the first and second rectangular spiral antennas voltages and voltage derivatives. The delayed voltages are V₁(t - τ₁) and V₂(t - τ₂) respectively (τ₁ ≠ τ₂) and the delayed voltage derivatives are dV₁(t - Δ₁)/dt, dV₂(t - Δ₂)/dt respectively Δ_μ. Additionally, there is a delay in time for the microstrip parasitic effects Δ_μ. The double rectangular spiral antenna system equivalent circuit can be described in terms of delayed differential equations, depending on variable parameters and delays. The stability of a given steady state is determined by the graphs of some function of τ₁, τ₂, Δ₁, Δ₂ and Δ_μ.

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双矩形螺旋天线RFID标签延迟电磁干扰和寄生效应下系统稳定性优化

本文讨论了双矩形螺旋天线RFID标签的关键问题，延迟电磁干扰和寄生效应下的系统稳定性优化。两个天线通过带寄生效应的微带线串联。我们定义V1(t)为第一个天线电感上的电压，V2(t)为第二个天线电感上的电压。由于电磁干扰，相对于第一和第二矩形螺旋天线的电压和电压导数，时延存在差异。延时电压分别为V1(t - τ1)和V2(t - τ2) (τ1≠τ2)，延时电压导数分别为dV1(t - Δ1)/dt和dV2(t - Δ2)/dt Δμ。此外，微带寄生效应在时间上有延迟Δμ。双矩形螺旋天线系统等效电路可以用随变参数和时延变化的时滞微分方程来描述。给定稳态的稳定性由τ1， τ2， Δ1， Δ2和Δμ的某些函数的图决定。

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2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)

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