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Anonymous users2024-02-07The size varies, indoor from BTS to indoor antenna feeder arrester with 2 1 feeder, then arrester to outdoor antenna bread is 8 7 feeder!! Hope you are satisfied!!
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Anonymous users2024-02-06There are two types of base station feeders: 1 2 and 7 8 feeders. There are a total of 2 jumpers from the main equipment of the base station to the antenna on the tower, and the feeder from the BTS of the base station BTS to the wiring frame part is a jumper, and then the antenna of the tower is a jumper, and the middle part is a feeder.
The thick one is the feeder, and the thin one is the jumper.
Base station design feeder calculations:
First of all: feeder size: according to the power of the signal sent in your equipment and the power you want to send at the antenna end, calculate the maximum loss value of the entire base station system, and then select the model according to the loss value of the cable provided by the manufacturer in the frequency band you use, of course, but also consider the loss value of the arrester, connector, jumper and antenna.
Generally, 7 8" cables are used.
Second: the length of the feeder: basically the height of the tower * the number of antennas, one antenna after another, and the polarization of the antenna has nothing to do with it.
Third: jumper, also a kind of feeder, is a small size feeder with a connector, generally used in the antenna and the main feeder connection (generally with ordinary 1 2" jumper), and the main feeder and indoor cabinet connection (generally with ultra-flexible 1 2" cable).
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Anonymous users2024-02-05There are two types of feeders for indoor distribution: 1 2 feeders and 7 8 feeders.
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Anonymous users2024-02-04There are two types of base station feeders: 1 2 and 7 8 feeders, and the room division is also these two types.
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Anonymous users2024-02-03There are two types of feeders for indoor distribution: 1 2 feeders and 7 8 feeders.
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Anonymous users2024-02-02Don't understand what you're asking? From now on, you should not have done antenna design, you are a novice, the impedance of the feed network is in the electromagnetic field transmission line when learning the formula, followed by I don't know what you want to express?
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Anonymous users2024-02-011. The thicker the feeder and the same length, the smaller the attenuation, for example: if you need to deploy over a long distance, the 5 4 feeder is better than the 7 8 feeder;
2. Cable: divided into DC cable and AC cable, 95mm cable from battery pack to switching power supply, AC cable is used for external power introduction, 4 25mm cable is generally selected, and 35mm cable is generally used for DC cable for equipment.
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Anonymous users2024-01-311. The thicker the feeder, the same.
Length. Attenuation.
The smaller it is, the better it is than the branch cover, such as: if you need to deploy it over a long distance, the 5 4 feeder is better than the 7 8 feeder;
2. Bridge high cable: divided into DC cable and AC cable, battery pack.
To the switching power supply with 95mm cable, AC cable for external power introduction, generally use 4 25mm cable, DC cable for equipment generally use 35mm cable.
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