Geometrical parameters of helical 120 GHz TE12,2 (right-hand rotating) – TE0,6 mode converter in circular waveguide with average radius ao = 8.74 mm (waveguide norm C120)  (mechanical tolerances are < 0.01 mm).
|Type of Mode Converter at 120 GHz||TE12,2 to TE0,6|
|Difference of Azimuthal Mode No. Δm||12|
|Maximum Perturbation Amplitude a1||0.074 mm|
|Wall Period Length λw||36.597 mm|
|Number of Periods N||3 (2 periods are tapers)|
|Total Length L||109.79 mm|
|Output Mode Purity||99.9 %|
|Ohmic Losses||1.4 %|
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