RF connectors are divided into RF coaxial connectors, RF triaxial connectors, and dual-core symmetric RF connectors. This article mainly discusses the five types of RF coaxial threaded connectors produced by Fasnwave.
SMA Connector: The full name is SubMiniature version A, with an outer conductor inner diameter of 4.13mm and using PTFE dielectric. The maximum frequency is 26.5GHz. It is a compact coaxial connector widely used in high-frequency signal transmission. Fasnwave SMA connectors are threaded with precision up to 0.02mm, with the inner pin gold-plated. The outer shell is typically nickel-plated or gold-plated, with the gold plating layer controlled between 1-3μm. Each product undergoes high-frequency performance testing after being assembled by professional staff.
3.5mm Connector: The outer conductor inner diameter is 3.5mm, using air dielectric. The outer conductor is thicker than that of the SMA connector, offering better mechanical strength, superior electrical performance, and higher mechanical durability and repeatability than SMA connectors. It is more suitable for use in the testing industry.
2.92mm Connector: The outer conductor inner diameter is 2.92mm, and the inner conductor diameter is 1.27mm, with air dielectric. The working frequency range can reach 46GHz. Since it covers the K-band, it is also known as the K-type connector.
These three connector- SMA, 3.5mm, and 2.92mm connectors are mechanically intermateable with each other as their inner conductor hole sizes are relatively close, and the outer conductor thread dimensions follow a universal standard. However, there are significant differences in outer conductor size, cutoff frequency, dielectric materials, and construction, which may result in improper connections or even damage to the connectors.
2.4mm Connector: Designed by RF engineer Julius Botka from Hewlett-Packard, the outer conductor inner diameter is 2.4mm, with air dielectric. The working frequency can reach up to 50GHz.
1.85mm Connector: Developed by Oldfield, this connector is even smaller, with the working frequency pushed up to 67GHz. Since the frequency covers the V-band, it is also called the V-type connector. The 1.85mm connector is compatible with the 2.4mm connector.
Below is a summary of their parameter differences.
