CAJ | 학술논문

在超宽带穿墙雷达接收机系统中，其关键的等效采样技术需要一种极窄脉宽高电压的脉冲触发采样门电路来对接收信号进行采样。介绍了超宽带取样脉冲产生技术，讨论并分析了几种常用超宽带脉冲产生方法的特点及其局限性。提出了新型的肖特基二极管脉冲整形网络，设计并实现了应用于等效采样接收机系统的新型亚纳秒取样脉冲产生器，很好地结合了雪崩晶体管与脉冲整形网络的优势，在显著减小脉宽的同时保持了较高的脉冲幅度。通过仿真分析和制作测试，获得了脉冲底宽为400 ps、幅度为6.46 V和波动水平为-14.7 dB的单极性窄脉冲，实测结果与设计数值一致性良好。这种简单高效廉价的电路十分符合超宽带穿墙雷达等效采样接收机取样脉冲的设计。
재초관대천장뢰체접수궤계통중，기관건적등효채양기술수요일충겁착맥관고전압적맥충촉발채양문전로래대접수신호진행채양。개소료초관대취양맥충산생기술，토론병분석료궤충상용초관대맥충산생방법적특점급기국한성。제출료신형적초특기이겁관맥충정형망락，설계병실현료응용우등효채양접수궤계통적신형아납초취양맥충산생기，흔호지결합료설붕정체관여맥충정형망락적우세，재현저감소맥관적동시보지료교고적맥충폭도。통과방진분석화제작측시，획득료맥충저관위400 ps、폭도위6.46 V화파동수평위-14.7 dB적단겁성착맥충，실측결과여설계수치일치성량호。저충간단고효렴개적전로십분부합초관대천장뢰체등효채양접수궤취양맥충적설계。
In the receiver of through-wall radar,equivalent sampling technology is the key technology which requires a narrow and high-amplitude pulse to trigger the sampling gate for sampling. In this paper,the ul-tra-wideband( UWB) pulse technologies are described,and then different approaches for generating UWB pulse are analyzed and compared. The considered pulse generation technologies are based on logic gates, Step-Recovery Diodes( SRD) and avalanche transistors. Furthermore,a novel approach for the sub-nano-second sampling pulse generator of the equivalent sampling receiver is investigated. The basis of the gener-ator is an avalanche transistor and a unique pulse-shaping circuit,which is composed of the Schottky diode and used to reduce the pulse width and maintain the higher pulse amplitude. Finally,the sampling pulse generator with pulse duration of 400 ps,pulse amplitude of 6. 46 V and ringing level of -14. 7 dB is simu-lated and fabricated. Good agreement between the measured and simulation results is achieved. With the features such as simple structure,stable performance and low cost,the proposed design is ideal for the sam-pling pulse of the UWB equivalent sampling receiver.