Golden Navigation: Characteristics of SMA type RF coaxial connector

Shenzhen Jinhangbiao Electronics Co., Ltd. (SHENZHENKINGHELMELECTRONCO., LTD.) was established in 2007. It is a national high-tech and dual-software certified enterprise, a senior member of the "China Satellite Navigation Association", an enterprise that has obtained the ISO9001 (04617Q13625ROS) quality management certification system, and is improving the IATF16949 automotive quality management system. The main business is the R&D, production and sales of Beidou satellite navigation and Internet of Things terminal application hardware, and the provision of www.BDS666.com logistics information intelligent system solutions.

So,golden navigation markThe editor will talk to you:SMA type radio frequencyCharacteristics of coaxial connectors

1. Structural characteristics

SMA connector is a connector with an outer conductor inner diameter of 4.13mm, a characteristic impedance of 50Ω, and a connection mechanism with British threads (external thread is 1/4-36UNS-2A, internal thread is 1/4-36UNS-2B). It is generally equipped with a hexagonal connecting nut of 7.85mm ~ 8mm. Depending on the applicable situation, there are three safety wire holes with a minimum diameter of 0.41mm evenly distributed on the connecting nut, which are used to pass through a safety wire with a diameter of 0.38mm to improve the reliability of the SMA connector.

The jack wall of the SMA connector is very thin and must be made of alloy materials with good strength and toughness (such as beryllium copper alloy), and must be properly heat treated.

The wall of the outer conductor of the SMA pin connector is very thin and should be made of strong alloy materials (such as beryllium copper alloy, stainless steel). If it is made of metal with poor strength and the tightening torque is large, the outer conductor may collapse and fail. The connection mechanism is threaded, and the connection and separation are slow and require a large wrench space, so it is not suitable for high-density installation.

2. Performance characteristics

Due to different structural forms, the electrical performance indicators such as frequency range, voltage standing wave ratio (VSWR), and insertion loss of various types of SMA connectors are also quite different, and are stipulated in their respective applicable standards. For example, the frequency range, voltage standing wave ratio (VSWR), and insertion loss of SMA connector adapters are specified in the currently effective GJB680/2, GJB680/28, and GJB680/31.

The above is the relevant content introduction brought to you by the editor of Shenzhen Jinhangbiao Electronics Co., Ltd. Thank you for reading!