Using computer aided designing and self matching of coating system to compress the pass band corrugation, large size film polarizer series with good qualities in a wide spectral range were developed to satisfy requirements for very high power laser.
用计算机辅助设计,依靠膜系自身匹配原则,压缩通带波纹,以此提高偏振膜的带宽和稳定性;同时对偏振膜的材料选择、膜系设计以及实际测量进行了研究,并在此基础上设计并制备出以HfO2/SiO2为镀膜材料,使用角度为60°,工作波长为1053nm的多层薄膜偏振片,该偏振片具有良好的光学性能和比较高的抗激光损伤阈值。
Modulation recognition of MQAM signals in the passband;
通带MQAM信号调制方式识别方法
Without increasing the size of the microstrip, the bandwidth of stopband or passband of the novel PBG microstrip line can be changed when the dispersion between the central frequency of PBG st.
由于采用了导带PBG结构和接地板PBG结构的复合,只需调整导带PBG结构与接地板PBG结构的中心频率的差值就能对阻带和通带进行相应的调整,而且并不增加该PBG微带线的尺寸。
Analytical formulae are presented for design of the passband equiripple Chebyshev filters.
提出了更便于使用的设计通带等纹波Chebyshev滤波器的解析公式。
Finite integration technique (FIT) is used to simulate the effects of shape change and optical printing precision on resonant frequency and the pass band of negative refractive index material.
下面利用有限积分法模拟形状变化和光刻精度产生的缺陷对负折射谐振频率和通带的影响。
This paper presents a model of cosine basis functions neural network based on BP algorithm,discusses the relation between the algorithm of neural network and amplitude-frequency characteristic about the linear phase FIR filter,introduces the convergence condition of neural network algorithm,and studies the optimal design example about the high-order FIR double-band-pass filters.
提出了一种基于BP算法的正弦基函数神经网络模型及算法的收敛条件,研究了该神经网络算法与FIR线性相位滤波器幅频特性的关系,给出了高阶双通带滤波器的优化设计实例。
A novel Bragg grating filter, and its transmission characteristics,width of passband, free spectral range and finesse are analysed.
本文提出并分析一种新型的布喇格光栅滤波器，用模式耦合方程分析了滤波器的传输特性，计算了通带宽度、自由谱宽和精细度。