CPC Subgroup
H01P 3/12 Hollow waveguides (H01P3/20 takes precedence)
Full Title
Waveguides; Transmission lines of the waveguide type > Hollow waveguides (H01P3/20 takes precedence)
6 direct subcodes
Child Classifications
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- H01P 3/123 with a complex or stepped cross-section, e.g. ridged or grooved waveguides (H01P3/14 takes precedence)
- H01P 3/127 with a circular, elliptic, or parabolic cross-section
- H01P 3/13 specially adapted for transmission of the TE01 circular-electric mode
- H01P 3/14 flexible