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| add time： | 2016-01-29 08:59:22 |
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RF cable is the transmission of radio range of electromagnetic energy in a cable, RF cable is indispensable in the various radio communication system and electronic equipment components, wireless communication and broadcasting, television, radar, navigation, computer and instrument in a wide range of applications.
Product features
1 can be transmitted over a wide frequency band
2 high degree of defense against external interference
3 antenna effect is small, the radiation loss is small
4 structure is simple, installation is convenient, comparative economy.
According to structure classification
(1) coaxial radio frequency cable
Coaxial radio frequency cable is the most common type of structure. Because the inner and outer conductor is in the concentric position, the electromagnetic energy is limited in the medium between the inner and outer conductor, so it has the advantages of small attenuation, high shielding performance, wide bandwidth and stable performance. Usually used to transfer 500 kHz to 18 thousand MHz RF energy.
At present, RF coaxial cables are commonly used two types: RF coaxial cable 50 and 75. The characteristic impedance of 75 ohm coaxial cable commonly used in CATV network, so that for CATV cable, transmission bandwidth of up to 1GHz, at present commonly used CATV cable transmission bandwidth is 750MHz.
(2) symmetric RF cable
Symmetric RF cable is open loop of the electromagnetic field, due to the high frequency electromagnetic radiation, so that the attenuation increases and lead shielding performance is poor, coupled with the impact of atmospheric conditions, usually with less. Symmetric RF cable is mainly used in the low frequency or symmetrical feed condition.
(3) spiral RF cable
Coaxial or symmetrical cable conductor, and sometimes can be made into a coil shape, thus increasing the cable inductance, thereby increasing the wave impedance of the cable and electromagnetic energy transmission time delay, the former for high resistance cable, and the latter is called delay cable. If the spiral coil winding along the length direction of different density, can be made of variable resistance cable.
According to the classification of types of insulation
(1) solid insulated cable
Fill the whole entity high-frequency dielectric between the inner and outer conductor of the cable, most soft RF coaxial cable which is used in insulation type.
(2) air insulated cable
The insulation layer of the cable, in addition to supporting part of the inner and outer conductors of solid medium, most of the rest are air volume. The structure is characterized from a conductor to another conductor can not through the dielectric layer. Air insulated cable has very low attenuation, is a type of structure used in ultra high frequency.
(3) - air insulated cable
This type of structure is somewhere between the two between a type of insulation, the insulation is composed of air and solid medium combination, but from a conductor to another conductor through solid dielectric layer.
According to the classification of insulating materials
Plastic insulated cable, rubber insulated cables and inorganic mineral insulated cable.
According to the soft classification
Soft cable, flat flexible cable and rigid cable, etc..
According to the power classification
Low power, 0.5 kW, 5 kW in 0.5 to power more than 5 kilowatts of power cable.
According to the classification of product characteristics
Low attenuation, low noise, small type and engage cable etc..
