![]() ![]() SMA ( S ub M iniature version A ) is a semi-precision 50-ohm impedance connector that can operate up to 18 GHz. ![]() Let’s get right into it! What Are SMA Connectors? The last two are more common in RF applications, and we’ll compare SMA vs. They include type N, UHF, TNC, SMA, and BNC. BNC, When comparing connectors for RF transmission wires, there are different options at your disposal. More and more, will be described in subsequent articles.About SMA vs. The cases of using them in combination with GPPO, GPO and other connectors are also increasing. With the rapid development of millimeter wave technology and high-speed communication technology, 2.92mm, 2.4mm and 1.85mm connectors are more and more widely used in military, aerospace, optoelectronics and other fields. Remember that they must not be connected to 2.92mm, 3.5mm or SMA connectors, otherwise it will directly cause the consequences of connector damage! They have a small inner diameter size, so the working frequency is higher, the nominal frequency can reach 50GHz and 67GHz respectively. The connector with the inner diameter of the outer conductor of 2.4mm and the impedance of 50 ohms is mechanically compatible with the 2.4mm connector, that is, the 1.85mm connector, the inner diameter of the outer conductor is 1.85mm, and the impedance of both is 50 ohms. It is quickly recognized by the majority of manufacturers and has become the most widely used millimeter wave in the world One of the connectors. The 2.92mm connector has good electrical performance in the DC~46GHz frequency band, and is mechanically compatible with SMA connectors and 3.5mm connectors. In 1983, Wiltron’s senior engineer developed a new type of 2.92mm/K type connector on the basis of summing up and overcoming the millimeter wave connector introduced before (K type connector is a trademark of Wiltron) ), the diameter of the inner conductor is 1.27mm, which can be inserted into SMA and 3.5 connectors. Its structure is similar to the 3.5mm connector, but smaller. The inner diameter of the outer conductor is 2.92mm, the characteristic impedance is 50Ω, and the connection The mechanism is a radio frequency coaxial connector with 1/4-36UNS-2 inch threads. Therefore, not only the electrical performance is better than the SMA connector, but also the mechanical durability and performance repeatability are higher than that of the SMA connector, so it is more suitable for use in the testing industry.Ģ.92mm connector (some manufacturers call this connector 2.9mm or K-type connector, and some manufacturers call it SMK, KMC, WMP4 connector, etc.). The outer conductor of the 3.5mm connector is thicker than the SMA connector, and the mechanical strength is better than that of the SMA connector. One obvious difference with SMA connectors (including Southwest Microwave's "Super SMA") is that 3.5mm uses air medium. This is the earliest available A radio frequency coaxial connector in the millimeter wave band. ![]() In the mid-1970s, the American Hewlett-Packard and Amphenol (mainly developed by HP, and the early production was carried out by Amphenol) introduced a 3.5mm connector with a working frequency of up to 33GHz. The 3.5mm connector is a connector with an inner diameter of the outer conductor of 3.5mm, a characteristic impedance of 50Ω, and a connection mechanism of 1/4-36UNS-2 inch threads. Radio antenna/low loss coaxial application Wireless LAN/RF application/Wi-Fi applicationĢ. Have relevant bulk cables and crimping toolsġ. Gold-plated body to improve corrosion resistanceĤ. The gold-plated center contact can minimize signal lossģ. Connect to the common reverse polarity interface in wireless systemsĢ. Even the millimeter wave connectors developed later (such as 3.5mm, 2.92mm) also consider the issue of mechanical compatibility.ġ. When mating flexible cables, it is DC~12.4GHz), and it is quickly popularized. Under the conditions at that time, due to the small size and It can work at a higher frequency (the frequency range for mating semi-rigid cables is DC~18GHz Initially, SMA connectors were designed for 0.141" semi-rigid coaxial cables and precision connectors for microwave applications in the military industry. It was one of the most commonly used RF/microwave connectors at that time. The SMA type RF coaxial connector was designed as an OSM connector by Bendix and Omni-Spectra in the late 1950s. How to Distinguish SMA, 3.5mm, 2.92mm, 2.4mm How To Distinguish SMA, 3.5mm, 2.92mm, 2.4mm ![]()
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