Are RF divide dividers, splitters, and power dividers the same type of device?

　　They are definitely not the same type of device; Their uses and functions are also different. Distributor is the most commonly used component in the distribution network of cable TV transmission systems. Its function is to evenly divide one input cable TV signal into several outputs, usually including two, four, six, etc. With the continuous increase in frequency and functionality of cable TV networks, the requirements for distributors are also constantly increasing. The working frequency range is 5MHz-870MHz, or even wider; The impedance of various RF interfaces in cable TV networks is 75 Ω. To achieve impedance matching, the input and output impedances of the distributor are both 75 ohms; Allocation loss, also known as insertion loss, is always desirable in a system to minimize the loss of the access distributor. The size of allocation loss is directly related to the number of allocation channels. The allocation loss of a two-way distributor is generally 3.5dB, and the allocation loss of a four-way distributor is generally 8dB. Distributors can also be divided into current passing type and bidirectional passing type in use; Outdoor type, indoor type, etc. The function of a splitter is to extract a portion of the transmitted cable TV signal and feed it to the branch line or user terminal, while the remaining majority of the signal continues to be transmitted in the original direction. There are usually one branch, two branch, four branch, and so on, with similar performance and allocator. The function of a power divider is to evenly divide one input satellite intermediate frequency signal into several outputs, usually including two power dividers, four power dividers, six power dividers, and so on. The working frequency of the power divider is 950MHz-2150MHz, and TV enthusiasts must be very familiar with power dividers. The purpose and performance of the above three devices are completely different, but in daily use, it is often easy to confuse their names, which can cause confusion for people.

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