This paper presents an investigation on innovative bandpass negative group delay (NGD) control. The bandpass NGD theory is elaborated with patch antenna-based circuit input impedance. The S-matrix and group delay (GD) models are expressed in function of the circuit geometrical parameters. To validate the no-contact electromagnetic coupling bandpass NGD control, proof of concept is designed, fabricated and tested. The bandpass NGD behavior is in good agreement between theoretical model, EM full wave simulation and measurement, which shows NGD center frequency, 2.2 GHz, value, −0.67 ns and insertion loss, −2.93 dB, and reflection loss, −11.39 dB. It is also demonstrated that the NGD parameters vary in function of the metallic sheet-patch distance increased progressively from 0 to 26 cm.

中文翻译：

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基于微带贴片电路的非接触带通NGD控制研究

本文对创新的带通负群延迟 (NGD) 控制进行了研究。带通NGD理论是用基于贴片天线的电路输入阻抗来阐述的。S 矩阵和群延迟 (GD) 模型以电路几何参数的函数表示。为了验证非接触式电磁耦合带通 NGD 控制，设计、制造和测试了概念验证。带通 NGD 行为在理论模型、EM 全波模拟和测量之间非常吻合，显示 NGD 中心频率为 2.2 GHz，值 -0.67 ns 和插入损耗 -2.93 dB，反射损耗 -11.39 dB。还证明了 NGD 参数随金属片-贴片距离从 0 到 26 cm 逐渐增加的函数而变化。