IEC 60153-4:2017 specifies straight hollow metallic tubing of circular waveguides for use as waveguides in electronic equipment.
The aim of this recommendation is to specify for hollow metallic waveguides:
a) the details necessary to ensure compatibility and, as far as essential, interchangeability,
b) test methods,
c) uniform requirements for the electrical and mechanical properties.
This edition includes the following significant technical changes with respect to the previous edition:
a) expand and revise the operation frequency range for waveguides,
b) revise the allowance of aperture dimensions,
c) revise the test method for aperture dimensions,
d) revise the equation of attenuation.