Market of SMA Connector Assembly
Due to the popularity of wireless application technology, the demand for the two kinds of SMA connector assembly and their demand has risen sharply. The electronics engineers have carefully studied these SMA connectors and the challenges they face in providing powerful data transmission. Nowadays, many kinds of mechanical and electrical solutions have been developed and mature to promote the connection between board and board, as well as power and data transmission. Multi-function SMA RF coaxial connector is one of the first choice in testing and measuring, communication, broadcasting and wireless technology.
For antenna applications, a small a (SMA) solution that provides bridging between RF and microwave can be used for standard and reverse polarity. They are usually designed for DC to 18GHz frequency ranges with 50Ω The characteristic impedance of the device and the screw coupling mechanism can realize the safe connection even in the high vibration environment.
SMA connector assembly categories include independent connectors and pre assembled cable assemblies with adapters, which allow a variety of standard SMA solutions to meet a wide range of application requirements. Connector options include PCB and panel mounting options with right angle or straight-line orientation, bulkhead and flange mounting options for rear mounting, and a variety of termination types based on the selected style.
RF coaxial connectors use right angle configuration as the main reference point to maintain the impedance at 50Ω. Due to the internal mechanical limitations, single pin and welding two-piece pin design is the most widely used. The impedance mismatch may be caused by the failure of internal mechanical structure, inaccurate size and improper solder paste volume at the two-piece design solder joints. The single pin right angle connector is designed by tiankele to minimize the signal loss caused by bending.
Another consideration in the design of RF coaxial connectors for right angle SMA connector assembly is the volume of air around the contacts, because impedance mismatch usually occurs at the bending of the center contact. In the two-piece design, the volume of air and PTFE must be calculated accurately to minimize impedance mismatch.
There are also several ways to optimize the transmission line with end emitting connector, including the design of various PCB thickness. These options provide different levels of mechanical stability and affect the transmission lines designed on the PCB. The contact area between the welding end of the central contact and the PCB transmission line is the key to achieve impedance matching and good transmission results. When the impedance deviation in the contact area is smaller, it is easier to achieve higher frequency.
To reach 50Ω the impedance matching of PCB should be designed to have lower impedance in order to compensate for the increase of impedance in the contact area where the welding end meets the transmission line. For frequencies above 6GHz, smaller and thinner flat pins can be used on the transmission line to reduce the impact of impedance mismatch. In these types of high frequency applications, due to its mechanical structure, the cylinder usually needs more effort to achieve acceptable impedance. However, from a mechanical point of view, the cylinder is stronger than the flat pin and may be more likely to be damaged during assembly and production.
Standards and protocols including 3G, 4G LTE, 5g, Wi Fi, Bluetooth and other IOT communication systems are widely used in consumer, medical, industrial, data communications and telecommunications markets. SMA connectors are usually optimized for frequencies below 6GHz, which helps to illustrate their wide appeal. However, the SMA connector provided by tecnole can work in the frequency range from DC to 18GHz, providing higher design flexibility for product designers in these and other markets.
In addition to different pin and transmission line design, customers can also achieve impedance matching by compensating the through hole element length after assembly on PCB (upper left), thus controlling signal loss (higher than Center) between PCB and SMT components, and limiting the size and height of the end transmission connector in transmission line design.
The application of the higher frequency SMA RF coaxial connector is difficult to match in the design and test stage. Since the signal path between the connector and PCB plays an important role in reducing impedance mismatch, it is very important to select the appropriate SMA connector and termination method in the early stage. Through hole reflow welding installation technology (THR) and other technologies provide more choices for designers.
The pre assembled coaxial cable assembly can also be used for SMA plug to SMA plug and SMA plug to SMA diaphragm socket connection, as well as several different types of cables, from flexible cable to manual shaped cable. Flexible coaxial cable options include rg-58c / u, rg-174 / u, rg-142 / u, rg-316 / u and rg-316 double woven, and hand molded options include 0.141 "and 0.085" cables.