標準號：IS 1885 Pt.41-1975
發(fā)布日期：1975/9/1 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：This standard ( Part XLI) covers definitions of terms applicable to passive, non-reciprocal components for circuits and transmission lines, that is multiport devices in which the propagation properties depend upon the direction of propagation of electromagnetic energy through the device.Note — Passive, non-reciprocal components usually utilize the gyromagnetic effect in a medium, for example, a ferrite, whose magnetic properties are expressed by a tensor permeability. Therefore, the term 'gyromagnetic device' may also be used for such components. On the other hand, not all gyromagnetic devices are non-reciprocal, since the wave propagation properties depend upon the spatial arrangement of the high-frequency and biasing magnetic fields.The biasing magnetic field, which may sometimes be due to remanent magnetiza-tion only, may be either static or dynamic. Components in which pulsed external fields are used to change the state of remanence ( and thereby the biasing field ) are sometimes called 'latching devices'.