Describe the meaning of standing wave ratio, Electrical Engineering

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a. Describe the meaning of standing wave ratio. What is the formula for it, if the load is purely resistive? Why is a high value of SWR often undesirable?

b. Determine how the constant intermediate frequency is achieved in the superhetrodyne receiver and also explain the given terms:-

i)  sensitivity,

ii)  selectivity and

iii)  image frequency

 


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