Method for manufacturing radio wave absorber, radio wave absorber, and radio wave absorbing article

A radio wave absorber comprising:

• magnetic particles;
• and
• a binder,
• wherein in a case where any axial direction in a plane perpendicular to a thickness direction of the radio wave absorber is defined as a 0° direction,
• each of a direction rotated by 30°, a direction rotated by 60°, a direction rotated by 90°, a direction rotated by 120°, and a direction rotated by 150° in a clockwise direction with respect to the axial direction as a reference is defined as a 30° direction, a 60° direction, a 90° direction, a 120° direction, and a 150° direction, and
• among squareness ratios measured for each of the thickness direction of the radio wave absorber, the 0° direction, the 30° direction, the 60° direction, the 90° direction, the 120° direction, and the 150° direction, a maximum value is defined as SQmax and a minimum value is defined as SQmin,
• a ratio, SQmax/SQmin, of SQmax to SQmin is less than 1.35.