標準號：IS 8426 Pt.2-1977
發布日期：1978/7/1 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：1.1 This standard ( Part II) describes method of measurement of gyromag-netic resonance linewidth,△H, and effective Lande factor, geff; spin-wave resonance linewidth△Hk , and effective resonance linewidth, △Heff , of ferrite materials, for application at microwave frequencies.Note 1 —For the purpose of this standard, the words ' ferrite ' and ' micro-wave ' are used in a broad sense:— by ' ferrites ' are meant only magnetodielectric chemical components having a spinel crystal structure, but also materials with garnet and hexagonal structures; and— the ' microwave ' region is taken to include wavelength between 1 m to 1 mm, roughly, the main interest being concentrated on the region 0·3 m to 10 mm.Note 2 — Examples of components employing microwave ferrites are non-reciprocal devices, such as circulators, isolators and non-reciprocal phase shifters. These constitute the major field of application, but the materials may be used in reciprocal devices as well, for example, modulators and ( reciprocal) phase-shifters. Other applications include gyromagnetic filters, limitors and more sophisticated devices, such as parametric amplifiers.