Before using a coaxial connector, it is important to understand its frequency range that can be used. This article will focus on 8 common coaxial connectors and introduce their commonly used frequency parameters.
1. N-type connector
The N-type 50 Ω connector was designed in the 1940s for military systems operating below 4 GHz. The improvements in the 1960s pushed performance to 12 GHz, and later even reached 18 GHz.
2. SMA connector
Due to the difficulty of fixing the dielectric pillar, the reflection coefficient of most SMA connectors is higher than other connectors when used up to 24 GHz.
3. 3.5mm connector
Its design strategy is to use conventional SMA sizes to achieve highly reliable physical interfaces, enabling thousands of repeated connections and reaching 34 GHz.
4. 1.0 mm feedthrough
One end of the feedthrough adapter is a 1.0mm female connector, and the other end is a glass to metal sealed interface. It is suitable for ultra-high frequency (up to 110 GHz) signal hopping from coaxial to microstrip line packaging or circuit boards.
5. 2.92mm connector
That is the K connector we usually use. The 2.92mm connector can be compatible with SMA and 3.5mm connectors. When used in the 46 GHz frequency band, it has excellent performance and is cheaper than 3.5mm connectors; When used below 18 GHz, the performance is superior to SMA joints.
6. 2.4 mm connector
2.4 mm connectors are generally used for 50 GHz connectors.
7. 1.85mm connector
Its operating frequency can reach 65 GHz. In recent years, the 1.85mm connector has been optimized to reach a frequency of 67 GHz.
8. 1.0 mm connector
The 1.0 mm connector is designed to support all transmission modes up to 110 GHz.
