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DIFF Subgroup
H01J 23/20

Cavity resonators; Adjustment or tuning thereof

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Details of transit-time tubes of the types covered by group > Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge > Resonators > Cavity resonators; Adjustment or tuning thereof

CPC:

Details of transit-time tubes of the types covered by group H01J25/00 > Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge > Resonators > Cavity resonators; Adjustment or tuning thereof

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

IPC defines codes here since 1974.

Child Classifications

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  • H01J 23/207 Tuning of single resonator since 1974 IPC+CPC Available in IPC and CPC
  • H01J 23/213 Simultaneous tuning of more than one resonator, e.g. resonant cavities of a magnetron since 1974 IPC+CPC Available in IPC and CPC