【摘要】 综合代表滤波器拓扑结构和特性的耦合矩阵是交叉耦合滤波器设计的重点。提出了一种基于广义特征值的优化综合方法,通过非线性最小二次求解,将耦合矩阵的广义特征值逼近至广义切比雪夫响应多项式传输函数零极值参考点,优化求解出带有频变交叉耦合带通滤波器的耦合矩阵。通过3个数值实例演示了该方法,并验证其有效性。这是对经典带通滤波器耦合矩阵综合方法的补充,为频变交叉耦合滤波器的设计建立了基础。更多还原

【Abstract】 The coupling matrix synthesis which represents the topology and characteristics of the filter,is the focus of the cross-coupling filter design. In this paper, a generalized eigenvalue-based optimization synthesis method is proposed. Through the nonlinear least-squares solution, the generalized eigenvalues of the coupling matrix are approximated to reference point of the zeros of the polynomial of the generalized Chebyshev response transfer function, and the optimal solution of the coupling matrix is obtained. This is a supplement to the classical bandpass filter coupling matrix synthesis method, and establishes the basis for the design of the frequency-dependent cross-coupling filters.更多还原