Basic knowledge of connectors
- Connector: A detachable element (except for adapters) usually installed on cables or equipment for electrical connection of transmission line systems.
- RF connector: It is a connector used in the radio frequency range.
- Video: Radio waves with a frequency range of 3HZ∽30MHZ.
- Radio frequency: radio waves with a frequency range of 3,000HZ∽3000GHZ.
- High frequency: radio waves with a frequency range of 3MHZ∽30MHZ.
- Coaxial: The inner conductor has dielectric support, and the structure can obtain the smallest internal reflection coefficient in the frequency range used in the measurement.
- Triaxial: A transmission line composed of three layers of concentric conductors with a common axis and insulated from each other.
- Grade: The level of the connector in terms of mechanical and electrical precision, especially in terms of the specified reflection coefficient.
- Universal connector (level 2): a connector that is manufactured with the widest allowable dimensional deviation (tolerance), but can still guarantee the minimum specified performance and interoperability.
Note: The requirements for reflection coefficient may or may not be specified.
- High-performance connector (level 1): A connector that specifies the limit value of the reflection coefficient according to frequency changes. Generally, the specified dimensional tolerance is not stricter than the corresponding level 2 connector, but it is necessary to ensure that the connector meets the reflection coefficient. When required, the manufacturer is responsible for choosing tighter tolerances.
- Standard test connector (level 0): a specific type of precisely manufactured connector used to measure the reflection coefficient of level 1 and level 2 connectors. The error caused by the measurement results can be ignored.
Note: The standard test connector is usually part of the adapter between different types, and the connection between the adapter and the precision connector forms part of the test equipment.
- Hermetic connector: a connector that can meet the specified gas, moisture or liquid tightness requirements.
- Barrier seal: a seal that prevents gas, moisture or liquid from entering the connector housing along the axial direction.
- Panel sealing: Prevent gas, moisture or liquid from entering the seal between the fixed or adapter housing and the panel through the mounting hole.
Note: The seal is usually provided as a separate product. Mating surface seal: a seal to prevent gas, moisture or liquid from entering the interface of a pair of mating connectors. Hermetic seal: the seal that meets the requirements of test Qk in IEC60068-2-17 “Basic Environmental Test Procedure Part 2: Test-Test Q: Seal”.