Introduction
A reflection attenuator uses a four-port quadrature coupler, with two matched terminations on the coupled and through ports. The terminations have to present at least a partially real impedance for the device to work. What's more, reflection attenuators have two or more discrete states (digital) and are most often they are used as variable phase shifters. Reflection attenuators use two equal resistors, and our tool allows you to determine the two possible resistor values (R1 > Z0 & R1 < Z0) for a reflection attenuator.
RT>Z0: RT=Z0*(10^(dB/20)+1)/(10^(dB/20)-1)
RT<Z0: RT=Z0*(10^(dB/20)-1)/(10^(dB/20)+1)
Equations
Enter the Impedance and required attenuation level to get values for R1 < Zo(Ω) and R1 > Zo(Ω).
Basic RF Attenuators - Design, Construction, Testing
People Also Ask (Q&A)
1. What is reflection attenuator?
A reflection attenuator uses a four-port quadrature coupler, with two matched terminations on the coupled and through ports. The terminations have to present at least a partially real impedance for the device to work. Reflection attenuators can be continuously variable, or "digital", with two or more discrete states.
2. What is attenuation measurement?
Attenuation is a measure of the reduction in power level experienced by a signal as it passes through a circuit. Attenuation values from 0.05 dB to over 60 dB can be measured, depending on the frequency of measurement.
3. What is attenuation signal?
Attenuation is the loss of signal strength in networking cables or connections. This typically is measured in decibels (dB) or voltage and can occur due to a variety of factors. It may cause signals to become distorted or indiscernible.
4. What causes attenuation?
Attenuation is the reduction in power of the light signal as it is transmitted. Attenuation is caused by passive media components, such as cables, cable splices, and connectors. An efficient optical data link must have enough light available to overcome attenuation. Dispersion is the spreading of the signal over time.
5. What is the use of attenuator?
Attenuators are electrical components designed to reduce the amplitude of a signal passing through the component, without significantly degrading the integrity of that signal. They are used in RF and optical applications.
6. What attenuation means?
Attenuation is the loss of signal strength in networking cables or connections. This typically is measured in decibels (dB) or voltage and can occur due to a variety of factors. It may cause signals to become distorted or indiscernible.
7. What does attenuation in dB mean?
In a nutshell, attenuation is the loss of transmission signal strength measured in decibels (dB). The main side effect of this is a reduction in total speed available due to those extra signals being sent.
8. Why does frequency increase attenuation?
The reason high frequency waves have greater attenuation than low frequency waves is due to viscosity. This radiates energy and reduces the amplitude of the wave. Low frequency waves have longer wavelengths and their peaks have lower pressure than high frequency waves. Consequently they lose less energy with distance.
9. What is the difference between attenuation and absorption?
Attenuation is the continuous dissipation of energy in an acoustic wave as it is propagating through a medium. Thus, in short, attenuation is a continuous energy loss as the sound wave is propagating, while absorption is a sudden energy loss when the sound wave encounters an absorbing object.
10. What is the unit of attenuation coefficient?
The SI unit of attenuation coefficient is the reciprocal metre (m−1). Extinction coefficient is an old term for this quantity but is still used in meteorology and climatology.
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