给出了一种实用的超宽带脉冲信号检测器实现方案,以差分输入方式的高速集成比较器为核心器件,利用集成比较器的N形I-V特征曲线中的负阻特性来实现微弱超宽带脉冲信号的检测。与相关检测相比具有更高的信息传输速率,相对于隧道二极管检测方式具有更佳的普及性、稳定性和可扩展性。实验结果表明,集成比较器检测方式的灵敏度与隧道二极管方式相当,但具有更低的成本和更强的可实现性。

This paper presents an implimentation scheme for detecting ultra wide-band(UWB) impulse radio(IR) signals using circuit with a normal ultra-high-speed integrated comparator,which has nonlinear dynamic characteristics the same as N-shaped I-V characteristic of tunnel diode.This circuit is configured to generate amplified pulse in response to incoming weak UWB impulse radio signals by utilizing the negative resistance region of the I-V characteristic with differential input.It can provide higher symbol rate than correlation detector,and is more stable,more feasible,and less complicated than the tunnel diode detector.The experiment results indicate that the detecting sensitivity of this scheme is approximately the same as that of the tunnel diode detector.

TN925

国家自然科学基金，教育部新世纪优秀人才支持计划，广西自然科学基金，广西新世纪十百千人才工程专项资金资助课题