目前,人们常常需要超宽带的定向耦合器使用均匀的四分之一波长耦合线节级联,就可能得到多个倍频程带宽的耦合器。然而由于各个线节之间电抗不连续性,严重地破坏了耦合器的定向性。耦合系数连续渐渐变小的切比雪夫高通耦合器是一种非对称的非均匀的耦合传输线定向耦合器,其响应为高通切比雪夫等波纹。这种耦合器超过某一截止频率就保持具有一定波纹的均匀耦合,理论上,耦合带宽为无限大,即没有上限频率。在对称带线上作了一个20dB耦合器试验,实验确明,理论计算与实验相吻合。 Currently, it is often desirable that UWB directional couplers use a uniform quarter-wavelength coupling stage concatenation, possibly resulting in multiple octave-band couplers. However, due to the discontinuity of the reactance between the individual line segments, the orientation of the coupler is severely impaired. Chebyshev high-pass couplers whose coupling coefficients continue to become smaller are asymmetric, inhomogeneous, coupled-line directional couplers whose response is high-pass Chebyshev ripple. This coupler maintains a uniform, ripple-coupled coupling beyond a certain cut-off frequency. Theoretically, the coupling bandwidth is infinite, ie there is no upper frequency limit. In the symmetrical stripline made a 20dB coupler test, the experiment shows that the theoretical calculation and experimental match.