Efficient calculation of impedance matrices for VE device circuit structures
This paper presents an efficient method for the calculation of impedance matrices of slow and standing wave structures used in vacuum electronic devices. These matrices can be imported by large signal parametric codes like TESLA-Z and CHRISTINE-CC for accurate small and large signal analysis of TWTs, klystrons and other VE devices [1], including effects of all geometric features and material properties included in the calculation of the impedance matrix. The technique employs both lumped (internal) and wave (modal, boundary) ports in the 3D finite element electromagnetic (EM) code ANALYST [2].