Interference effects of repetitive ultra-wideband pulses on low noise amplifier
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摘要: 理论分析和仿真研究了重频超宽带脉冲对低噪声放大器（LNA）的干扰特征，给出了高斯脉冲幅度、脉宽及重频等参数对LNA干扰效果的规律，对工作于40~80 MHz频段的接收机LNA开展了相关验证实验。结果表明：干扰特征主要由LNA工作频带和脉冲参数决定；不同脉冲参数对干扰的效果影响不同，脉冲幅值的影响最显著；在验证实验研究的参数范围内，增大高斯脉冲幅度、脉宽和重频均有利于增强对LNA的干扰效果。Abstract: Based on the results of the theoretical analyses and simulations, the relationship between the Gaussian pulse parameters (pulse width, pulse amplitude, pulse repetition frequency) and the interference effects on a low noise amplifier (LNA) is discussed. The experiments are carried out on the LNA operating at the 40-80 MHz band to confirm the interference effects. The results show that: the interference characteristics are much depended on the operating band of a LNA and the pulse parameters; the pulse amplitude is the most significant factor among all the pulse parameters; the increase of the values of the above three pulse parameters will enhance the interference effects.
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Key words:
- ultra-wideband pulses /
- low noise amplifier /
- interference /
- pulse parameters
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