矩形系数

另外，为了抑制带外信号以及非线性器件带来的谐波干扰，提高电路的整体性能，要求滤波器具有良好的矩形系数和优异的带外抑制能力。

Furthermore , in order to suppress the external signal and the harmonic distortion caused by nonlinear devices , and to improve the overall performance of the circuit , a good shape factor and excellent band suppression are required for filter .

该滤波器组用于通信电子对抗，工作频率为30～40MHz，各信道的矩形系数为1.6，信道插入损耗15dB，滤波器组输入端口的驻波系数小于1.5。

For each channel , the rectangular coefficient is 1.6 , the insertion loss is 15 dB , and the standing wave ratio at input end of the filter is < 1 . 5 .

本文最后阐述了采用多抽样率结构来设计窄带FIR滤波器的优点，即能够有效地从通带宽度、通带波纹、矩形系数、阻带衰减等方面对窄带FIR滤波器的性能进行控制。

At last , this paper points out that this method can efficiently control the performance of narrow band FIR digital filters .

该产品在-40℃~+85℃环境温度范围工作时，带内波动≤2dB，载频抑制接近80dB，矩形系数≤1.2，插入损耗≤2dB。

When this kind of productions are working in the operation temperature range of-40 ~ + 85 ℃, the suppressed carrier frequency approaches 80 dB , the rectangle coefficient is not larger than 1.2 , and the band fluctuation and insertion loss are all less than 2 dB .

该方法可以兼顾矩形系数、阻带抑制和带内波纹等多种因素，实现最优设计。

This method is easy to make compromise with rectangle coefficient , stopband suppression and bandpass ripple , and to realize optimum de sign ;

在设计中，采用分裂指，假指，多条耦合器和倾斜换能器技术，有效地抑制了主要的二阶效应，获得了低矩形系数，低波纹，低群延迟波动和高阻带抑制。

By using a multistrip coupler and tilted transducers in association with split fingers and spurious electrodes the second order effects were suppressed effectively .

特别是在中频输出电路或脉冲调制系统中，为保证信号波形无畸变的输出，高矩形系数、带内平坦、平延时的滤波器受到相当重视。

To make sure no mutation of output signal wave form , filer with high rectangle coefficient , flat passband and flat group delay is needed in these systems .

准椭圆函数滤波器的传输零点，可以位于阻带内的任意位置处，这能更加灵活地对滤波器的带外抑制度进行调节，其矩形系数可以做得很高。

The transmission zeros ( TZ ) of Quasi-elliptic function filter could be placed in any position , so the attenuation out of band is controllable , then a high selection performance could get .

淹没矩形防波堤透反射系数特性研究

Reflection and transmission properties of submerged rectangular breakwater s