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lavster
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why does a change in impedance causes reflection? I know that R=(Z2-Z1)/(Z1+Z2), but what is it that makes the wave be reflected?
thanks
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Impedence is a measure of the opposition that an electrical circuit presents to the flow of alternating current (AC). It is represented by the symbol Z and is measured in ohms (Ω).
Impedence is calculated by taking the ratio of the voltage to the current in a circuit. It can also be calculated using Ohm's Law: Z = V/I, where Z is impedence, V is voltage, and I is current.
Reflection occurs when there is a mismatch of impedence between two parts of a circuit. This causes part of the signal to be reflected back towards the source instead of passing through the circuit, resulting in a loss of power.
Reflection can result in a decrease in the efficiency and accuracy of a circuit. It can also cause signal distortion and interference, which can lead to errors and malfunctions in electronic devices.
Reflection can be minimized by using components with matching impedence values, such as resistors and capacitors. Other techniques, such as terminating transmission lines with a resistive load, can also help reduce the impact of reflection on a circuit.