Since their origins in the 1930s, coaxial RF (Radio Frequency) electrical connectors have advanced their capabilities and are considered reliable, rugged, high-performance connectors. Today, these RF connectors — designed to work at radio frequencies in the multi-megahertz range — are used in various markets, including telecommunications, aerospace, industrial equipment, and military applications.
The Evolution of RF Connectors
Amateur radio enthusiasts with engineering backgrounds began experimenting with VHF (Very High Frequency) connectors around 1926. The origin of UHF (Ultra High-Frequency) connectors can be traced back to the early 1930s, when both VHF (Very High Frequency) and UHF technology were still in their earliest stages. Both UHF and VHF connectors are still used today in amateur radio applications and citizen’s band and marine radio.
The type N connector, often referred to as an N connector, was one of the first connectors capable of carrying microwave frequencies. This particular connector was invented in the 1940s by Paul Neill of Bell Labs (who the connector was named after), and modern versions continue to be used in low-frequency microwave systems.
Later, the BNC connector was co-created by Paul Neil and Carl Concelman (who is also credited with the C connector) and patented by Amphenol in 1951. The goal behind its development was to minimize wave reflection/loss. Originally used for military applications, it now finds use in RFs up to 2 GHz and is often used in connection with the transfer of composite video on commercial video devices.
The SMA (Sub-Miniature A) RF connector — originally named the ‘BRM’ (Bendix Real Miniature) connector — was designed in 1958 by James Cheal at Bendix Research Laboratories. Development of the SMA connector continued four years later in 1962 by Omni Spectra. At that time, it became known as OSM (Omni Spectra Miniature). However, it wasn’t until 1968 that it received its current designation of SMA as it was incorporated into MIL-C-39012. Now, SMA connectors are used in applications ranging from RF power amplifiers to Wi-Fi antenna systems.
Modern RF Connectors
Coaxial RF connectors have evolved to offer strong electrical performance — many capable of withstanding dust and water exposure with environmental seal ratings up to IP68.
SV Microwave Connectors by Amphenol
Amphenol SV Microwave connectors offer a versatile solution for applications requiring RF
transmission within a high-frequency range. With frequencies ranging from 26.5 GHz to 65 GHz, these connectors boast low VSWR and RF leakage, ensuring stability and reliability in connections. Various mating styles are available to maximize flexibility, all designed to safeguard mating surfaces and circuit elements from damage and deterioration. Well-suited for high-speed digital, instrumentation, military, aerospace, satellite, and test & measurement markets, Amphenol SV Microwave connectors meet the demanding requirements of these industries. The connector series available from Amphenol SV Microwave include SMA, 2.92mm, 2.4mm, 1.85mm, SMP, SMPM, and SMPS.
Amphenol RF Connectors
Amphenol RF offers a comprehensive range of connectors, adapters, and accessories designed for various harsh environment applications. These high-quality components, including Amphenol connex connectors, are trusted in industries requiring dependable connections, such as automotive, broadband, broadcast, medical, wireless, military aerospace, and industrial equipment.
Amphenol RF connectors find widespread use in applications such as broadband, wireless LAN/RFID, wireless infrastructure, instrumentation, and any system requiring radio frequency, microwave, or data transmission. With the versatility to address different frequency ranges, Amphenol RF connectors come in various types, including standard, miniature, sub-miniature, and micro-miniature. The product range also includes between-series adapters and specialized connectors tailored to specific needs.
PEI-Genesis: Your Source for RF Connectors
PEI-Genesis can help you find the best RF solution for your application. Our large inventory of off-the-shelf electrical connectors will give you confidence in knowing you will find the best option for your design specifications and budget. PEI-Genesis’ team of connector experts and engineers will work with you to find the right connector solution for your application or help you develop a custom-engineered one.
