一、引言集中参数延迟线由若干数值上相同的电感线圈和电容器组成。通常有常 K 式和 m 导出式两种网络型式(图1),m 导出式中又有对称型和不对称型之分。常 K 式网络制作比较简单,但其延时随频率升高而增大,传输特性差。m 导出式网络通过调节线圈之间的互感,可在通带内得到较好的延时频率特性,信号畸变小。 I. INTRODUCTION The centralized parameter delay line consists of a number of inductors and capacitors of the same value. Usually there are two kinds of network type, usually K-type and m-type (Figure 1). There are two symmetrical and asymmetrical types in the m-type. Often K-type network production is relatively simple, but the delay increases with increasing frequency, transmission characteristics. By deriving the mutual inductance between the coils, the derivation network of m can obtain good delay frequency characteristics in the passband and the signal distortion is small.