门控分幅相机增益均匀性优化设计
Optimization of framing camera gain uniformity
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摘要: 利用宽度渐变微带线进行了门控分幅相机增益不均匀性修正技术研究。建立了渐变微带线修正的物理模型，通过特性阻抗调配补偿幅度衰减，设计了特种渐变微带线参数。比较了特种曲线渐变微带线与传统直线渐变微带线的修正效果。在0~4 GHz带宽范围内，特种曲线渐变微带补偿后，电压幅度不一致性由15.0%降低至1.6%，增益不一致性由70%降低到8%。对于当前使用的分幅相机，微带线宽度由6.00 mm渐变到4.45 mm就能有效地降低门控分幅相机增益的不一致性。Abstract: Correction of gain nonuniformity is researched by using taper microstrip. The physical correction model is founded. The taper microstrip compensates the magnitude attenuation by compensating the impedance of microstrip. The taper microstrip is designed. The correction results of curve taper microstrip and straight taper microstrip are compared with each other. The voltage nonuniformity decreases from 15.0% to 1.6% and the gain nonuniformity decreases from 70% to 8% with curve taper microstrip compensation while the frequency of pulse is between 0 and 4 GHz. The taper microstrip with width from 6.00 mm to 4 mm has a good effect of correcting the gain nonuniformity for current framing camera.
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Key words:
- framing camera /
- micro channel plate /
- taper microstrip /
- voltage magnitude /
- gain /
- nonuniformity
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