Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [resonance]

For questions about resonance, the phenomenon in which the amplitude of an electrical circuit's output increases when the frequency of its input is equal to or near the circuit's natural frequency. Consider also using the "frequency-response" tag.

For questions about resonance, the phenomenon in which the amplitude of an electrical circuit's output increases when the frequency of its input is equal to or near the circuit's natural frequency. Consider also using .

See Wikipedia's article on resonance for more information.

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Resonance frequency

How does one find the resonance frequency in a circuit? Wikipedia and the like give some definitions that are not very useful in practice. I found somewhere(I think on this site but I cannot find it anymore) a definition that said that the resonance…
user1830663
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Bandpass vs. Resonance

To pass a certain frequency, you can either have a resonant LC or a bandpass filter made from 2 capacitors and 2 resistors (a high pass and low pass filter put back to back. What is the difference between these two circuits, and is there an…
skyler
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Do all passive circuits possess resonant frequencies? Can we prove it?

Let's say we have any circuit, with two available terminals, consisting exclusively of ideal constant-resistance resistors, ideal constant-capacitance capacitors, and ideal constant-inductance inductors. We connect the two terminals of the circuit…
alejnavab
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Why is the ouput so low in this LC resonant circuit?

159.2Hz is the resonant frequency. Shouldn't the output be at least same as the input at resonance? EDIT: I was hoping to see voltage amplification when the circuit was at resonance without using any active components, not even batteries, using…
across
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Standing waves modes inside a cavity resonator

Follow up postI have researched the concept of a rectangular cavity resonator and have come across the term modes. For a given frequency one can have multiple modes. What do these multiple modes signify practically? Are some modes better than…
JoeyB
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Q of RLC network

I've looked at other posts on RLC circuits at resonance, but I have a slightly different question (please forgive me if this has been answered and I missed the post). simulate this circuit – Schematic created using CircuitLab To find the resonant…
jrive
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Why does S-param resonance behavior differ from formula?

The general formula for resonance is \$w_0=\frac{1}{LC}\$ . A simulation was built with such inductor and capacitor so the resonance will be at 1GHZ.However as you can see in the result ,the plot shows a very small Q factor resonance and its…
Josh23
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One port resonator critical coupling Q factor measurement using S11

I saw this youtube video which says there are two methods measuring unloaded Q factor. He says there are two options as shown bellow. I have a one port resonator. I could not find anywhere the theory of 2.5 dB he says in the video. Is there some…
lub2354
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Struggling to work out initial conditions for LC circuit

If we have a inductor and capacitor in parallel, then from what I can tell, the equation for the current is just the simple harmonic motion equation: i = Acos(w0t) + Bsin(w0t). However I am struggling to solve it for the initial conditions of the…
Bren
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Good coupling intuitions between microstrip line and cylindrical dielectric resonator

I am trying to get a good coupling between microstrip resonator and cylindrical dielectric resonator. I know it's a sort of transformer equivalent model. I am moving the dielectric cylinder around the microstrip line and I don't have a clue how to…
lub2354
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Calculating resonant frequency

Here is my attempt: Can someone explain to me how to proceed? How do I deal with the negative sign here? If I get the resonant frequency now, it will be complex. Am I not supposed to use the negative sign for the capacitive reactance?
alayoiskgfbfqhxjiw
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RLC or LC and why

simulate this circuit – Schematic created using CircuitLab I've run in to some trouble, working out wether i need to use a RLC or just a LC tank for my circuit. My circuit is an H-bridge, where i need to use either LC or RLC on the output, to make…
gamerEgirl
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Resonant circuit problem

The value of C1 is 680pF and C2 is 220pF. I think this is a series resonant circuit with a parallel capacitor C2 to the inductor. My question is how can I calculate the resonant frequency from this circuit? And what is the effect of the capacitor…
leo curious
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How do I determine the resonance frequency of this circuit

I have a circuit that consists of a voltage source in series with a resistor and a parallel of an inductor with a capacitor. I have to determine the resonance frequency of this circuit. I am very confused about this. First of all the impedance of…
Granger Obliviate
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Why does the MRI machine does not rip off its own electronic components

Maybe it's a lame question but it came up to my mind recently. Usually, Electronic equipment or metallic materials are forbidden in MRI rooms. Also, there are no electric sockets present in that room. How is the machine designed so that it does not…
Kushal Madane
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