Waveguide detachable joints

Conclusions

The theoretical formulas (1)-(4) represent correctly the effect of small gaps in waveguides. In the case of longitudinal sections (Fig. 1) with a gap amounting to 0.01 of a waveguide height, the measured attenuation amounts to ∼0.8 of the computed one. In the case of a transverse section with a gap between flanges of 0.1 of a rectangular-waveguide height or a circular-waveguide radius the attenuation value amounts to 0.8–0.9 of the computed one (rectangular waveguide) and to 1–1.2 of the computed one (circular waveguide).

Justification for idealizing the contact connections due to adopting the concept of an effective gap consists of good agreement among gap values obtained in measuring at various frequencies the attenuation of different contact couplers whose contacting surfaces were subjected to the same production technology. The effective gap values were in good agreement with the directly measured deviations from flatness.