What is the role of RF antenna cable connector
Development of RF coaxial connectors
RF coaxial connector is usually considered as an element installed on cable or instrument, which is used as an electrical connection or separation element of transmission line. It belongs to mechatronics products. In short, it mainly acts as a bridge.
Compared with other electronic components, the development history of RF antenna cable connector is short. UHF connector appeared in 1930 is the earliest RF antenna cable connector. During the Second World War, due to the urgent need of war, with the development of radar, radio and microwave communication, medium-sized series such as N, C, BNC, TNC, etc. emerged. After 1958, miniaturized products such as SMA, SMB and SMC appeared. In 1964, the U.S. military standard Mil-C-39012 general specification for radio frequency coaxial connectors was formulated. Since then, RF antenna cable connectors began to be standardized, serialized Development in the direction of generalization.
For more than 60 years, through the joint efforts of experts from various countries, RF antenna cable connectors have formed an independent and complete professional system and become an important part of the connector family. It is an indispensable key component of coaxial transmission system. The development technology of RF antenna cable connector in the United States, Britain, France and other countries is in a leading position. Its design, production, testing and use technology has become a complete set and tends to be improved. It has not only formed a complete standard system, but also standardized raw materials, auxiliary materials, testing systems and assembly tools, and carried out professional large-scale production.
Professional characteristics of RF coaxial connector
1. Many varieties and specifications: there are more than 20 international general series, with more varieties and specifications.
2. It relies on the mechanical structure to ensure the electrical characteristics. It is a mechatronics product, which is essentially different from other low-frequency connectors.
3. Part processing is mainly turning machine processing, and there are many manual assembly operations, so it is difficult to carry out automatic assembly.
4. Product upgrading is slow.
5. It is an important part of electrical connector and belongs to labor-intensive products with certain technical content.
6. Product reliability, failure mode and failure mechanism are complex.
Current situation of domestic RF antenna cable connector industry
In China, RF antenna cable connectors have been developed and produced by the whole machine factory since the 1960s. In the 1970s, it began to be produced by professional manufacturers. Before the 1980s, according to the policy of self-reliance, it mainly imitated Soviet products. Since the 1980s, it has adopted international standards to develop and produce international general series products, mainly state-owned and collective enterprises, and some private, joint venture and foreign-funded enterprises have emerged in succession. So far, there are hundreds of domestic RF antenna cable connector manufacturers, but the scale is small. The production means and production level of general connectors of backbone manufacturers are on a par with those of foreign countries.
Development trend of RF coaxial connectors
With the miniaturization of the whole system, the volume of RF antenna cable connectors is becoming smaller and smaller, such as SSMB, MMCX and other series.
2. High frequency
HP in the United States has introduced RF antenna cable connectors with frequencies up to 110ghz as early as a few years ago. The use frequency of domestic general products shall not exceed 40GHz. The service frequency of flexible cable shall not exceed 10GHz, and that of semi-rigid cable shall not exceed 20GHz.
In addition to acting as a bridge, it also has the functions of signal processing, such as filtering, phase modulation, mixing, attenuation, detection, amplitude limiting, etc.
4. Low standing wave and low loss
Meet the needs of weapon system and precision measurement.
5. Large capacity and power
It mainly meets the development needs of information superhighway.