Discussion reply!!! about 50 words resonance and impedance matching


  • esearch and discuss resonance and impedance matching in a Tank Circuit.

I chose this topic because I have never known how receivers worked  beyond having material that absorbs an electromagnetic wave and most  likely has a capacitor that filters out the unwanted “noise”. A tank  circuit used in receivers uses both and capacitor and an inductor to  filter out frequencies too high or too low. like a legal balance scale  that only turns on the radio if the scale is balanced. So hypothetically  (there are probably other factors like “Q factor” to smooth it out)  there will be one frequency range where it can pass through both the  capacitor and inductor.

  • Research and discuss Bandwidth and Q Factor of an LC parallel resonant circuit.

So bandwidth is the reference to a range of frequencies. Similar to  how many lanes a road has. I am not sure I understand this Q factor  completely, but I think that is the measurement of how much intensity  the wave can pass through the capacitor and inductor. The more intense  the wave, the more there is to sample, which means more data/quality.  The intensity of the wave can be manipulated by using  resistance/resistors. The trade-off I think would be that your bandwidth  would widen as well. Then I think a circular effect could happen where  we require more precise transponders as well to give more precise  frequencies, so we can get more out of our frequencies, repeat,  repeat.  

  1. Why should inductive reactance and capacitive reactance match in a tank circuit?

If they didn’t match by having a “matching window”, no signal would come through.

  1. What determines the resonance frequency and bandwidth in a tank circuit?

I think the value of reactance determines the resonance frequency and the resistance determines the bandwidth.

  1. How does Q Factor in a tank circuit change at high and low resonance frequencies

The Q factor widens with high resonance and narrows with low resonance.

Q factor and bandwidth of a resonant circuit: Resonance: Electronics textbook.  All About Circuits. (n.d.). Retrieved January 11, 2023, from  https://www.allaboutcircuits.com/textbook/alternating-current/chpt-6/q-and-bandwidth-resonant-circuit/

Simple parallel (tank circuit) resonance: Resonance: Electronics textbook.  All About Circuits. (n.d.). Retrieved January 11, 2023, from  https://www.allaboutcircuits.com/textbook/alternating-current/chpt-6/parallel-tank-circuit-resonance/

Winter/Fall 2010. (n.d.). Retrieved January 11, 2023, from https://tiij.org/issues/issues/winter2010/fall_winter_2010.htm

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