The power capacity of RF coaxial connectors is one of the important links in evaluating the quality of RF coaxial connectors. So what do you know about the power capacity of RF coaxial connectors?
The question of the power capacity of rf coaxial connectors is a complex one, which is completely different from the power transmission at DC or low frequency and has many factors that can affect it.
Pinhole size: Pinhole size is related to the current capacity of the connector, directly related to power.
Voltage resident wave ratio: The reflected wave occupies the channel capacity space, resulting in a decrease in the transmission power capacity.
Access loss: There is a difference between the input and output power due to the loss.
Air pressure (altitude): Changes in air pressure cause changes in the dielectric constants of the air segment, and air is easily ionized at low pressure to produce coronas. The higher the altitude, the lower the air pressure and the lower the power capacity.
Contact resistance: The presence of contact resistors can cause the contacts to heat up, making it difficult to transmit microwave signals with higher power.
Frequency effect: Changes in the transmission signal frequency directly result in loss and voltage residency ratio changes, which affect the transmission power capacity. There are skinning effects and so on.
Because the above reasons are uncertain, the connector generally does not give the power capacity value index (later you will see the theoretical value is very high, far beyond the scope of use), only in the load, attenuator and other microwave passive device technical indicators will be calibrated power capacity and instantaneous (less than 5 seconds) maximum power index. There are some radar design manuals and microwave transmission books that refer to the power capacity values of certain types of connectors, but are conservative empirical values (with a safety factor).
