Discussion on Power Capacity of RF Coaxial Connectors(1)

With the rapid development of wireless communication and radar technology in recent years, in order to increase the transmission distance of the system, it is necessary to increase the transmission power of the system. As part of the overall microwave system, the RF coaxial connector needs to be able to withstand the transmission requirements of high power capability.

At the same time, RF engineers also need to perform high-power testing and measurement frequently, and various microwave devices/components for testing also need to be able to withstand high-power. All of these put forward higher and higher requirements for the power capacity of RF coaxial connectors. Power capacity is also an important indicator for evaluating the quality of RF coaxial connectors.

How much do you know about the power capacity of RF coaxial connectors? The power capacity of the shaft connector is a relatively complex issue. There are many factors that can affect it, and some factors will affect each other, including: joint size (including pinhole size), operating frequency, main body material, insulation medium. Materials, contact reliability, contact resistance, VSWR, ambient temperature, altitude, etc.

The figure below is the recommended power capacity of different RF connectors at different frequencies given by ZOMWAVE. You can choose the appropriate connector according to the product's operating frequency and withstand power when designing RF products.

Next, we will introduce in detail the various factors that affect the power capacity of RF coaxial connectors.

Connector size

For the RF signal of the same frequency, the power of the connector with a large size is large. For example, the pinhole size of the connector is related to the current capacity of the connector, which is directly related to the power. Among various common RF coaxial connectors, 7/16 (DIN), 4.3-10, and N-type connectors are relatively large in size, and the corresponding pinhole size is also large. Generally, the power tolerance of N-type connectors is about SMA. 3-4 times.

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1.Discussion on Power Capacity of RF Coaxial Connectors(2)

2.Discussion on Power Capacity of RF Coaxial Connectors(3)