试题名称:微波技术一、求开路传输线上电流的幅度和相位的变化规律.(25分) 二、设D和d分别为同轴线的外导体内径和内导体外径,E_b和ε_r分别为绝缘介质的击穿场强和相对介电常数,求它的特性阻抗和极限传输功率. (25分) 三、均匀传输线上任意一点的阻抗与该点的反射系数之间具有一定的对应关系.求证:阻抗平面上的等r线在反射系数平面上的对应轨迹是一族圆心在 (25 points) Second, let D and d be coaxial with the outer diameter of the inner conductor and outer conductor, respectively, E_b and ε_r were Insulation dielectric breakdown field strength and relative dielectric constant, and its characteristic impedance and limit the transmission power. (25 points) Third, uniform transmission line at any point of the impedance and the point of reflection coefficient has a certain correspondence between. Prove: Equal r line on the impedance plane in the reflection coefficient plane corresponding trajectory is a family of center