RF Cable Assembly in Low-lying Environment
As the Weighing the signal source (usually referred to as linear signal), the noise characteristics of the terminal equipment and even all connected systems, a measure of the noise level of the measurement system is added physically, called the noise figure, in dB. In the whole system for transmitting data signals, the influence of noise on the performance of the RF cable assembly is reflected in the relative high and low of the signal and noise, that is, the signal to noise ratio.
As an example of a common television, if the signal-to-noise ratio of the output is larger, the sound is clearer and the graphics are clearer. The noise figure mentioned is the ratio of the signal-to-noise ratio at the input to the signal-to-noise ratio at the output. So from the basic theory, let's talk about how to reduce the noise figure of the system in the RF field.
1 Using low noise components
Internal noise of electronic components plays an important role in amplification or other circuits. Therefore, improving the noise performance of electronic components and using low-noise electronic components can greatly reduce the noise figure of the circuit. In the circuit, other circuit components that can cause noise must be carefully used. The most important one is the resistance element, and a fine metal film resistor should be used.
2 Select the appropriate signal source internal resistance
When operating at higher frequencies, the better internal resistance and the common-base amplifier's input resistance are close. Therefore, a common base amplifier can be used to make the better internal resistance equal to the input resistance, thus achieving the minimum noise figure and maximum. Power gain.
3 Pick the suitable working bandwidth
The noise voltage is related to the passband width. When the bandwidth of the receiver or amplifier becomes large, the internal noise of the receiver or amplifier also becomes large. Therefore, it is necessary to carefully select the bandwidth of the receiver or amplifier so that it is not too narrow to meet the standard of distortion when the data signal passes, and is not too wide to prevent the signal-to-noise ratio from being lowered.
4 Pick the suitable connection system
In a strict low-noise environment, in addition to the signal source, components and working bandwidth to be as low-noise as possible, the connection system is also an essential part. Coaxial cable is the backbone of the RF system connection. It is also necessary to have suitable products to meet the requirements of low noise systems.
Twinlink Communication Technology (Shenzhen) Co., Ltd., a 12-year professional manufacturer of RF cable assemblies, has provided customers with thousands of RF solutions with 12 years of industry experience. Tiankele is committed to becoming the leader in the field of radio frequency. The pursuit of high performance and high quality is the driving force of Tiankele. Choosing Tiankele is the solution to choose a quality RF connection.
Twinlink Communication Technology (Shenzhen) Co., Ltd., a 12-year professional manufacturer of RF cable assemblies, has provided customers with thousands of RF solutions with 12 years of industry experience. Twinlink committed to becoming the leader in the field of radio frequency. The driving force of Twinlink is pursuit of high performance and high quality. Choosing Twinlink is the solution to choose a quality RF connection.
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