IS 8426 : Part 1 : 1977 Methods of measurements for properties of gyromagnetic materials for use at microwave frequencies: Part 1 Magnetization

1. SCOPE

1.1 This standard (Part I) describes method of measurement of saturation magnetization, ( Ms ) and magnetization ( at specified field strength (MH ) of ferrite materials, for application at microwave frequencies.

NOTE 1 - For purpose of this standard, the words ‘ferrite’ and 'microwave' are used in a broad sense:

a) By ‘ferrites’ are meant not only magnetodielectric chemical components having a spine1 structure, but also materials with garnet and hexagonal structures; and

b) The ‘microwave’ region is taken to include wavelength between 1 m to 1 mm, roughly, the main interest being concentrated on the region 0.3m 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 repciprocal devices as well, for example, modulators and (reciprocal) phase-shifter. Other applications inculude gyromagnetic filters, limiters and more sophisticated devices, such as parametric amplifiers.