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When we design an oscillator, sometimes we design in terms of voltage, then we have to satisfy the Barkhausen criterion: gain * feedback = 1. In this condition, feedback is mandatory.
But we also use the reflection coefficient to design an oscillator, in...
Thank you for your comments! :)
I more agree with flashking. :)
However, we can also use the same formula to calculate reflection coefficients using impedances, instead of transmission lines. That means at low frequencies, we also have to consider reflection coefficients as well. Now if we...
When we design an oscillator, sometimes we design in terms of voltage, then we have to satisfy the Barkhausen criterion: gain * feedback = 1. In this condition, feedback is mandatory.
But we also use the reflection coefficient to design an oscillator, in which case we have to satisfy the...
Re: Ask guys a question!
The higher the frequency, the shorter the wavelength, then without care, some long wires would become transmission lines without impedance matching => more reflection occurs.
1. Yes, the impedance changes with frequency. And some formulas for antenna impedance you can find only at their resonant frequencies. For example a dipole antenna: 73 + 43j at its resonant frequency. At other frequencies, the derivation is complicated and requires lots of tedious steps...
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