Patent ID: 8458644
Filing Date: 2013-06-04
Classification: G06F

Abstract:
1. An evaluation method, characterized by inserting an RF circuit by a first port and a second port in a circuit to be observed, at an arbitrary cross-sectional point of the RF circuit and evaluating a forward or backward reflection coefficient (or a characteristic impedance); and by assuming that the forward-view reflection coefficient is Γ S and the backward-view reflection coefficient is Γ L an absolute value of a product therebetween abs(Γ S Γ L ) is or the absolute value of the product and a phase angle of the product phase(Γ S Γ L ) are employed as an index of stability of the circuit to be observed, the RF circuit on a circuit simulator to be used in a microwave or millimeter wave range or a high-frequency range, the RF circuit comprising: a function for being inserted by a first port and a second port thereof in a circuit to be observed, at an arbitrary cross-sectional point of the circuit, and evaluating a reflection coefficient (or a characteristic impedance) in the cross-section, wherein an insertion loss between the first port and the second port is zero or approximately zero and is ignorable also for any finite system impedance other than zero.