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Circuit analysis and optimisation of the high-voltage high-efficiency IR-UWB pulse generator for ranging and radar application
IET Circuits, Devices & Systems ( IF 1.3 ) Pub Date : 2020-07-13 , DOI: 10.1049/iet-cds.2019.0379
M. Arif Hussain Ansari 1 , Choi Look Law 1
Affiliation  

An in-depth circuital analysis of an energy-efficient high peak power impulse radio ultra-wideband (IR-UWB) pulse generator monolithic microwave integrated circuit (MMIC) design is presented. The proposed IR-UWB pulse generation process is explained in detail. A trade-off between the peak output power level and the frequency of operation is discussed. The proposed circuit is optimised for the highest possible peak output power in the 3-5 GHz UWB band for ranging and radar application. The presented IR-UWB pulse former makes use of the cascode heterojunction bipolar transistor (HBT) configuration for signal scaling operation instead of the common emitter configuration. The proposed cascode pair configuration results in higher output voltage swing as well as reduced power consumption. The effect of coupling capacitors on amplification factor of the pulse former stages as well as impedance profile of the distributed transmission line is discussed in great detail. The temperature-dependent parasitic component in the proposed circuit is studied. Its effect on the transient behaviour of the proposed IR-UWB pulse generator is analysed, which is important for IR-UWB beamforming applications. The required mathematical model for the parasitic effect is derived and explained.

中文翻译:

用于测距和雷达应用的高压高效IR-UWB脉冲发生器的电路分析和优化

提出了一种节能高效的峰值功率脉冲无线电超宽带(IR-UWB)脉冲发生器单片微波集成电路(MMIC)设计的深入电路分析。详细说明了建议的IR-UWB脉冲生成过程。讨论了峰值输出功率水平和工作频率之间的权衡。拟议中的电路针对3-5 GHz UWB频段的测距和雷达应用中的最高可能峰值输出功率进行了优化。提出的IR-UWB脉冲形成器将共源共栅异质结双极晶体管(HBT)配置用于信号缩放操作,而不是使用公共发射极配置。提出的共源共栅对配置导致更高的输出电压摆幅以及降低的功耗。详细讨论了耦合电容器对脉冲形成级放大系数的影响以及分布式传输线的阻抗分布。研究了所提出电路中温度相关的寄生元件。分析了其对所提出的IR-UWB脉冲发生器的瞬态行为的影响,这对于IR-UWB波束成形应用非常重要。推导并解释了寄生效应所需的数学模型。
更新日期:2020-08-20
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