High performance rf cable

Rf cable industry development current state and future prospects

时间:2019-09-18 16:29


Definition and classification of rf cables
1. Definition of rf cable
RF is the abbreviation of RadioFrequency, referred to as "RF", which is a kind of abbreviation of high-frequency alternating current changing electromagnetic wave, representing the electromagnetic frequency that can radiate into space, with the frequency range of 300KHz ~ 30GHz. Radio frequency cable is the transmission of radio frequency range of electromagnetic signals or energy cable.
2. Classification of rf cables
According to the structure, rf cable can be divided into coaxial cable and symmetrical cable. Coaxial cable is composed of two concentric conductors with an insulating layer between them. The signals transmitted by the inner conductor are shielded by the outer conductor to reduce signal interference and ensure the transmission effect. Symmetric cable is composed of two mutually insulated wires wound together according to certain specifications, so as to offset the radiation between each other, reduce noise interference and ensure the signal transmission effect. Multiple symmetrical cables are combined as data cables.
According to the purpose, rf cable can be divided into three categories: 75ohm coaxial cable, 50ohm coaxial cable and data cable. 75ohm coaxial cable is mainly used for transmitting wired video signal, 50ohm coaxial cable is mainly used for transmitting high power wireless communication signal, and data cable is mainly used for transmitting data signal.
The purpose of the product
Rf cable is mainly used in the field of wired and wireless communication, including radio and television communication system, fixed network communication system and mobile network communication system.
Iii. Industry development status
According to the company's Marketing Department, in 2012, the domestic market demand for 75 euro coaxial cable amounted to 4.67 million kilometers, and the demand for data cable amounted to 14.3 million boxes. It is estimated that by 2018, the domestic coaxial cable market demand will reach 7.21 million kilometers, data cable demand will grow to 24.1 million boxes.
Iv. Mode of operation
After years of development, three kinds of competitive enterprises have formed in the rf cable market: brand service providers, professional manufacturers and a small number of large integrated enterprises.
After years of development, large integrated enterprises have prominent brand advantages and can provide integrated solutions for downstream customers, such as amphenol, baitong and kangpu. Brand service providers use their understanding of market segments to provide professional support and after-sales services to end customers, such as Anixter (AnixterInternationalInc.), Graybar (GraybarServices,Inc.) and WESCO (WESCO international,Inc.). Specialized manufacturers focus on product design, research and development and manufacturing, providing manufacturing services for large conglomerates and brand service providers. Other types of enterprises, only have a certain production and sales capacity, lack of design ability, material and process research ability, lack of professional support and brand, or produce low-end products, engaged in OEM production, product quality and performance compared with professional manufacturers, there is a big gap.
V. future development direction of the industry
(1) high-frequency can achieve higher rates and provide more applications
A signal has a certain frequency when it travels. The difference between the maximum and minimum of the signal transmission frequency is called bandwidth, which is the width of the signal spectrum and also called frequency band. Various signals are transmitted at different frequencies to avoid crosstalk. In the wireless field, the application field of radio frequency cable can be divided into aviation communication, navigation communication, land communication, radio and television, radio navigation and other different services, each of which has a certain frequency band. In the field of cable signal transmission, 15~40MHz band is used for transmitting telephone signals, 110~860MHz band is used for transmitting TV signals, and above 860MHz band is the standby band for realizing more applications.
The continuous diversification and personalization of various communication applications require the communication network to have a faster transmission speed, which is positively correlated with the channel frequency band and signal power. Broadening the channel frequency band and realizing the high-frequency network can effectively improve the data transmission speed and realize more applications. Therefore, how to adapt to the high-frequency transmission environment has become an important development direction of rf cables and related supporting products.
(2) it shall meet the development requirements of environmental protection and energy conservation
High frequency signal has a more obvious skin effect, therefore, coaxial cable inner conductor can use iron or aluminum material copper plating process, namely copper clad steel or copper clad aluminum structure, on the one hand, can reduce the weight of the cable, on the other hand, can achieve more than 70% of the scarce copper resource savings. Rf cable can achieve the same design performance with less raw material consumption through material improvement and process optimization. Through the structure and circuit design of the main body and amplifier module, the high-frequency head can reduce the consumption of aluminum shell and the number of components, thus realizing resource saving.
(4) the quality of rf cable is developing towards low loss, consistency and anti-interference
When the signal spreads in the medium, part of the signal leaks or is converted into heat, so there will be loss, that is, signal attenuation. Signal attenuation is mainly related to dielectric constant and signal frequency. The better the dielectric effect, the smaller the dielectric constant value and the lower the signal attenuation. In the high frequency signal transmission system, the attenuation degree will be multiplied, the higher the performance requirements of the cable.
(5) the enterprise shall comply with the high requirements of production technology and technical standards
Copper clad steel for high quality radio frequency cable shall be even coated with copper after stretching and bending, and the thickness shall be consistent and up to standard, so as to ensure the quality of high frequency signal transmission. In the production of copper coated steel, steel wire surface oil and oxidation film should be completely eliminated, in order to ensure the stability of the pre-coating; Regular analysis and deployment of pre-plating solution, main electroplating solution composition ratio, to ensure that the copper coating stable and uniform; The coating quality can be guaranteed only when the temperature is suitable and the current density is stable.
To sum up, energy-saving and environmental protection, high quality, high frequency cable and supporting products are in line with the development direction of the industry, with complex process requirements, high precision requirements, strict material requirements, and multiple processes involved. Only enterprises with strong technical development ability, manufacturing ability and advanced management ability can produce and manufacture.
6. Market development trend of rf cable industry
Technology evolution and policy encouragement are powerful driving forces for the development of communication and related industries. The continuous evolution of new concepts, new technologies and new models drives the rf cable industry to break through barriers and continue to develop.
(1) tri-grid fusion promotes the continuous growth of rf cable demand
(1) the integration of three networks to break the monopoly of radio and television and telecommunications operators
(2) the competition between the major operators intensified, high quality rf cable demand continued to grow
(2) 75 ohm coaxial cable market demand continued to grow
(1) cable and satellite TV users continue to grow, drive the growth of rf cable demand
(2) high frequency, high quality coaxial cable will benefit from global radio and television digitalization and high definition (3) coaxial cable will be the main access network use products in the long term
(3) data cable market demand continues to grow
In the 21st century, the information industry is developing rapidly, the Internet and information transmission technologies are becoming increasingly mature, and the number of fixed broadband access users worldwide is rising rapidly. By the end of 2010, the number of fixed broadband users worldwide had reached 510 million, and will increase to 776 million by 2016, with a compound annual growth rate of more than 7%, according to Ovum.
High-speed broadband access is a strategic choice for communication operators, whose business expansion depends on the improvement of bandwidth. Data traffic shows geometric growth and is mainly realized in the way of fixed network. According to CiscoSystems, inc. forecasts, the global fixed network realized data traffic will grow at a compound annual rate of 21% from 2012 to 2017, reaching 81,818 pepb per month in 201.
Building intelligent led indoor the rapid development of integrated wiring market, its core is based on computer network as the main means of communication, through the building system including voice, data, video images wiring plan as a whole, make the voice and data communications equipment, switching equipment, and other information management systems connected to each other, and to realize intelligent system integration comprehensive integrated configuration and management of each subsystem. On the one hand, the construction scale of intelligent buildings is growing all over the world, and the installation amount of integrated wiring system is increasing year by year. On the other hand, from the perspective of transmission rate, the integrated wiring system is undergoing a process of development from 100 megabytes to gigabit and 10 gigabit. In the process of transformation, data cables with faster transmission speed and better environmental performance are needed to meet the requirements of the system.
As global for HDTV (High - definitiont elevision, HDTV) and High quality program requirements continue to increase, and the rapid growth of the regional, multi-language channel, satellite television operators provide tens of thousands of TV and radio channel, this undoubtedly greatly increased to receive satellite TV signal of High frequency head and satellite TV receiver needs.
According to Idate's research report, in 2013, the number of global satellite TV users totaled 402 million. It is expected that by 2018, the number of global satellite TV users will reach 529 million, with an average annual compound growth rate of 5.61%. From 2013 to 2018, the number of paid satellite TV users and digital satellite TV users grew at a compound annual growth rate of 5.89 percent and 7.09 percent, respectively, faster than other types of users. By 2018, there are expected to be 291 million paid satellite TV subscribers and 527 million digital satellite TV subscribers worldwide. The number of satellite TV users and digital conversion will greatly drive the rapid growth of the high-frequency market.
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