CAJ | 학술논문

给出了波导-带状线-同轴线型定向耦合器技术参量的计算表达式,利用Matlab软件定量地研究了耦合器结构尺寸和输入波频率对耦合器的技术参量的影响.数值结果表明:方向角对耦合度及方向性的影响最大;耦合小孔深度对理想方向角影响最大;输入频率在低频端(小于2.0 GHz)对理想方向角的影响很大,而在中高频端的影响较小.在波导-带状线-同轴线型定向耦合器的设计中,除了可以改变小孔大小及旋转方向来满足耦合度和方向性外,还可以通过改变带状线尺寸以及耦合器位置来调节耦合度和方向性.
급출료파도-대상선-동축선형정향우합기기술삼량적계산표체식,이용Matlab연건정량지연구료우합기결구척촌화수입파빈솔대우합기적기술삼량적영향.수치결과표명:방향각대우합도급방향성적영향최대;우합소공심도대이상방향각영향최대;수입빈솔재저빈단(소우2.0 GHz)대이상방향각적영향흔대,이재중고빈단적영향교소.재파도-대상선-동축선형정향우합기적설계중,제료가이개변소공대소급선전방향래만족우합도화방향성외,환가이통과개변대상선척촌이급우합기위치래조절우합도화방향성.
Calculation expressions of technical parameters are derived for the waveguide-stripling-coaxial line directional coupler. The impact of structure dimension of the coupler and input frequency on the parameters is studied using Matlab. Numerical results indicate that, included angle has the greatest impact on coupling coefficient and directivity; optimal directivity angle are most sensitive to coupling hole depth, and it varies sharply with input frequency in low frequency range (less tham 2.0 GHz) and becomes much smoother when the frequency goes higher. Thus in the design of this coupler, designed coupling coefficient and directivity could be achieved through adjusting stripline size and coupler position besides the conventional ways of changing aperture size and rotation direction.