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Introduction to the role and type of N RF Fixed Attenuator
 Jan 24, 2022|View:636

N RF Fixed Attenuator is a fundamental component of RF and microwave circuits and systems. Often found in almost all RF applications, the N RF Fixed Attenuator plays a key role in receivers, transmitters, and test and measurement systems.The primary role of the N RF Fixed Attenuator is to reduce the signal strength before sensitive circuit elements. Attenuators can be manufactured using a variety of techniques, and understanding the available options for attenuators can help engineers select the most appropriate attenuator for their application.


N RF Fixed Attenuator


(A) Definition

N RF Fixed Attenuator only along the signal path to reduce the desired or unnecessary signal strength. They can be used to reduce the output signal of the device under test prior to sensitivity testing and measurement of the receiver to ensure a more consistent impedance match or to ensure precise control of the signal amplitude at the output of the transmitter. The attenuation level of a device - the amount of signal power/voltage lost through the device - is usually measured in decibels (dB) or voltage ratios.

Wideband attenuators are the most common type of attenuator. However, certain types of attenuators and techniques may have frequency-dependent performance and limitations. Although termination also reduces the signal strength under system load, an attenuator, unlike termination, is connected in series with the signal path.


Attenuator N Male to Female attenuator 2W 6GHZ 20dB


(ii) Types

N RF Fixed Attenuator is based on passive resistors, absorptive materials/techniques, PIN diodes or field effect transistor (FET) technology. In addition, attenuators can be developed with coaxial transmission lines, ribbon lines, surface mount or even waveguide interconnect technologies. The performance and physical characteristics vary greatly between these technologies. The quality and cost of the structure can affect the range of performance, thermal properties and physical properties.

RF Fixed Attenuators can also be classified as having fixed attenuators or adjustable attenuators. Adjustable attenuators include switching attenuators with discrete attenuation levels and continuously variable attenuators with analog adjustment. Both types of attenuators can be designed for electrical or mechanical control. Some attenuators can be programmed and controlled by digital signals or even software.