Open Access
Tab. 3
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) [36] (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 % |