An iris acts as an obstruction inside a hollow waveguide, reflecting a portion of the electromagnetic wave back toward the source. By sizing and positioning the opening correctly, engineers create a localized resonance or filter out specific frequencies. The shape of the hole determines whether the iris adds inductive or capacitive reactance to the transmission line.
Heard on the job
We need to machine a new inductive iris for the Ku-band waveguide to tune out that harmonic.
Also heard as
- waveguide iris
- diaphragm