The Selection of RF Attenuator

Ⅰ. About the RF attenuator

The RF attenuator can reduce the power of the RF signal. Typically, radio frequency signals are transmitted through a coaxial cable, and the attenuator is used online with the cable. The attenuator is also used in circuit companies and microwave submissions. Operators who are unfamiliar with cables cannot immediately understand the prerequisites for reducing RF signals, because they may require signal amplifiers for TV response after being surrounded by fewer signals. The RF attenuator is an indispensable tool. It can make signal propagation schemes such as cable TV more consistent by allowing balanced levels. The more common use of RF attenuators is testing and calculations, where the signal from the test equipment is usually stronger.

The programmable RF attenuator is basically resistant, which is consistent with the RF signal. The RF attenuator can convert a certain amount of RF power into heat to reduce the signal. The number of resistors used determines the amount of attenuation. RF energy is not as moderate as (direct current) DC, so the choice of resistance type and the removal of RF are important.

Ⅱ. The choice of RF attenuator

An RF attenuator is a device that reduces the amplitude (amplitude) level of the arriving signal. They work hard to protect plans from higher-level development signals. The components used for all radio frequencies allow you to find radio frequency attenuators from many manufacturers. You can filter out the best manufacturer according to your needs. When choosing an RF attenuator, it is important to check the constraints specified by your prerequisites. You can choose programmable RF step attenuators based on some parameters.

1. Attenuation: You will see some attenuation you need. If you are looking at a fixed RF attenuator, it will be an individual attenuation level in decibels (dB). However, if you are looking at an adjustable attenuator, then you will find a specific range that suits your work.

2. Precision attenuation: This is the attenuation level, which can be divided into different ways.

3. Frequency: It is the frequency classification that the attenuator can play a role in maintaining its electrical parameters (such as level attenuation, (voltage standing wave ratio, VSWR, etc.). The attenuation level usually fluctuates on the frequency group of interest. Carefully understand the frequency pair The reduction and restoration of the workpiece frequency group are very important.

4. Impedance: Attenuators are usually designed to work with a typical impedance of 50 ohms, but 75-ohm attenuators are also quite interoperable. It is very important to compare the typical impedance of the attenuator with the impedance of the scheme or circuit that will be used anywhere, which will minimize the echo.