Five Directions RF Antenna Cable Connector Develop
A connector is an electromechanical element that connects a conductor (wire) with an appropriate mating element to connect and disconnect a circuit. Consumer electronics connectors: JST, amp, MOLEX, jam, i-pex automotive electronic connectors: JST, sumotomo, Yazaki, FCI, ket / Kum. Since the emergence of UHF series connectors in 1930, the development history of RF antenna cable connectors is only a few decades. However, due to its good broadband transmission characteristics and a variety of convenient connection modes, it is more and more widely used in communication equipment, weapon systems, instruments and household appliances. With the continuous development of the whole machine system and the continuous progress of production technology, RF antenna cable connectors are also developing, and new varieties emerge in endlessly. Through the analysis and sorting of relevant information in some foreign professional magazines, combined with my many years of experience in connector product design and development, it is considered that the RF antenna cable connector will develop in the following directions in the future:
1. Miniaturization and miniaturization
The miniaturization of the whole machine system can not only realize the characteristics of multi-function and portability, but also greatly reduce the material cost, transportation cost and energy consumption, especially for aerospace products, but also greatly reduce the launch cost. The miniaturization and miniaturization of components is the premise of the miniaturization of the whole machine system. Only by using miniaturized components can we realize high-density installation and save more space.
Detailed explanation of five development directions of RF antenna cable connector
SSMB Series RF antenna cable connector products appeared in previous years are widely used in portable radios, missiles and other military products because of their small and compact structure and fast plug-in connection characteristics; In recent years, new types of connectors such as 1.0/2.3 (SAA) self-locking connector and MMCX and SMP (2.4mm plug-in connector) have emerged. They are miniaturized and miniaturized products, which are widely used in the new generation of communication equipment. These products can achieve high installation density. Compared with the familiar SMA series products, the actual occupied area of the printed board straight socket is 3.5 & times respectively; 3.5 = 12.25mm2 and 0.25 π & ties; 9.32 = 68.4mm2 (where 9.3 is the envelope outer diameter of SMA screw sleeve).
2. High frequency
In order to obtain wider channel space and achieve higher data transmission rate, the working frequency of the whole system is increasing. In the new generation of optical transceiver developed by Wuhan academy of Posts and telecommunications, the frequency of some coaxial transmission microwave signals has reached more than 12GHz, the working frequency of military communication system has already stepped into the millimeter wave band, and the research of domestic weapon system has already shifted from the 8mm Wave Band to the 3mm wave band. At present, the country is developing millimeter wave RF antenna cable connectors with a frequency upper limit of 50 ~ 110ghz.
As early as the early 1990s, HP company in the United States launched a 1.0mm RF antenna cable connector with a frequency of up to 110ghz, which has been applied in a small batch in its microwave testing instruments; Other international well-known large companies have also launched different varieties of millimeter wave RF antenna cable connectors, such as apc2.4 and apc3.5 series of AMP company, ossp series and SMP (ordinary 0 ~ 26.5ghz, precision 0 ~ 40GHz) series, K series and V series (1.85mm), among which 3.5mm, 2.4mm, K series and SMP series have been produced in large quantities, It is widely used in communication equipment, test instruments and weapon systems.
3. Surface mount
In the short ten years since the emergence of SMT (surface mount) technology, the assembly automation of the whole machine industry has been significantly improved and the product cost has been greatly reduced, which also promotes the transition of the component industry from traditional pin packaging to chip surface mount devices (SMD). The emergence of SMD is also known as the fourth revolution of electronics. According to fleck research, the global output of chip surface mount components reached 700 billion in 2000, accounting for 70% of the total output of components
At present, many series of low-frequency surface mount printed board connectors have begun mass production and use, while surface mount RF antenna cable connectors are only used in batches in user terminal products such as mobile phones because of their special requirements for structure and stress under working conditions, and the manufacturers are also quite limited. However, with the continuous development of SMT technology, surface mount will become the mainstream way to connect small connectors with microstrip and PCB.
Multifunction is a development direction of components, and RF antenna cable connectors are no exception. The new connector not only plays the role of electrical connection, but also has the functions of filtering, phase shifting, attenuation, detection, mixing and so on. DC block RF antenna cable connector with filtering function has been widely used in many complete machine systems abroad; SMD series attenuation and detection connectors have been widely used in domestic distribution frame equipment; 1 / 4 wavelength band-pass lightning protection connector is also a new multifunctional connector widely used in antenna feeder system.
The use of multifunctional RF antenna cable connectors can simplify the equipment structure of the whole machine to the greatest extent and improve the anti-interference ability of the system. More varieties of multifunctional RF antenna cable connectors will be developed and used in the next few years.
5. High performance, high power
In order to meet the needs of the development of information superhighway, communication equipment is required to achieve high transmission rate and high signal-to-noise ratio, which requires various components in the system to achieve high electrical performance indicators. The characteristics of high-power and multi-channel transmission of the new generation communication system put forward new requirements for the EMC (electromagnetic interference) performance index of RF antenna cable connector. The International Electrotechnical Commission (IEC) has formulated the test standard for the "passive intermodulation" performance index of coaxial connector, which will become the basic electrical performance index of high-power RF antenna cable connector.
In short, RF antenna cable connector will develop rapidly with the development of the whole system, and replace waveguide and other microwave devices in more fields, becoming an indispensable key component in the field of microwave transmission.