How is the RF connected? Domestic SMA connectors tell you the answer

As a sub-category of electronic connectors, RF Connectors has always been a relatively popular category in the competitive industry of connectors. Typically RF Connectors are used with Coaxial Cable to provide shielding and minimize changes in transmission line impedance at the connection.

There is a class of ultra-miniature RF connectors called SMA Connectors. The smaller the RF connector, the more difficult it will be to manufacture, the cost will increase rapidly, and it will have an impact on accuracy and tolerance. Therefore, how to maintain the mechanical and electrical properties of SMA connectors has become a standard to verify the maturity of SMA Connector products. Durability, contact tightness, connection torque and bonding force in mechanical properties, voltage standing wave ratio, insertion loss and power in electrical properties, etc., all play a decisive role in the "quality" of SMA Connector.

The advantages of international leading SMA connectors are reduced

The connectors of TE, Amphenol, Binder, Molex and other international mainstream benchmarking manufacturers have always represented the world's advanced level, and have deep accumulation in cost control, advanced manufacturing technology and innovative design.

The performance of TE's SMA Connectors can reach above 12.4GHz, which many manufacturers can do now, but TE will have more selectivity in materials. These include stainless steel, brass, zinc die castings, and more, as well as a corrosion-resistant non-magnetic white bronze finish. This can very well reflect the accumulation and precipitation of a connector benchmarking enterprise. In the selection and application of materials, TE is a little more clever than other peers. Different materials and different processes, TE's SMA Connectors can fully meet all the performance requirements of MIL-C-39012.

Domestic SMA connectors are advancing by leaps and bounds

Domestic SMA Connectors have also made great progress and development in recent years. In addition to long-term investment, domestic enterprises are also constantly trying new things. By designing new structures, optimizing new processes, and using new materials, we can narrow the gap with international industry leaders from the source as much as possible. ZOMWAVE's SMA Connector series is close to the international first-class standard in reliability. In order to adapt to aerospace applications, ZOMWAVE connector products are often more resistant to the environment than similar products, and the temperature coverage from -65°C to 165°C is a rare wide coverage range.

Depending on the cable configuration, the maximum VSWR of ZOMWAVE SMA Connectors are 1.15+0.02f and 1.10+0.02f respectively. This is definitely the industry-leading VSWR, reflecting the unique design of the entire connector. At the same time, the contact resistance of the inner conductor and the outer conductor is also reduced as much as possible. The contact resistance of the inner conductor of 0.003Ω and the contact resistance of the outer conductor of 0.002Ω is not difficult to see. While ensuring reliability, the influence of contact resistance is minimized.

It can be seen that in low-end applications, the domestic ZOMWAVE SMA connector is actually not that big of a gap with TE's faucets. Although it is impossible to achieve the same performance as these first-mover advantage manufacturers in terms of technology, materials and design, the performance is also improving year by year, and it has not been left behind.