In this article, we demonstrate signal interference concept based wideband negative group delay (NGD) circuit with an arbitrary termination port impedance. The proposed circuit consists of unequal power division ratio 180° hybrid and in‐phase combiner. The NGD can be generated by controlling power division ratios of 180° hybrid and combiner. For experimental verification, the circuit is designed and fabricated at a center frequency of 2 GHz. The experiment results show that the proposed NGD circuit can provide 460 MHz NGD bandwidth (bandwidth of group delay <0 ns) with group delay of −0.8 ns at 2 GHz.

中文翻译：

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利用信号干扰原理的任意端接负群延迟电路

在本文中，我们演示了基于信号干扰概念的宽带负组延迟（NGD）电路，具有任意终端端口阻抗。拟议的电路由不等功率分配比的180°混合电路和同相组合器组成。可以通过控制180°混合器和组合器的功率分配比来生成NGD。为了进行实验验证，该电路是在2 GHz的中心频率下设计和制造的。实验结果表明，所提出的NGD电路可以在2 GHz下提供460 MHz的NGD带宽（群延迟带宽<0 ns），群延迟为-0.8 ns。