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I have a simple question about general meaning & importance of the coupling capacitor in following part of a simple receiver circuit:   

enter image description here

Is it true that the proper reason why this coupling capacitor C2 sitsis there is simply because thisit should form part of the circuit should form a bandpass-filter C2-L1-C1?

enter image description here

Or does my interpretation hardly missing the point?

I have a simple question about general meaning & importance of the coupling capacitor in following part of a simple receiver circuit:  enter image description here

Is it true that the proper reason why this coupling capacitor C2 sits there is simply because this part of the circuit should form a bandpass-filter C2-L1-C1?

enter image description here

Or does my interpretation hardly missing the point?

I have a simple question about general meaning & importance of the coupling capacitor in following part of a simple receiver circuit: 

enter image description here

Is it true that the proper reason why this coupling capacitor C2 is there is simply because it should form part of the bandpass-filter C2-L1-C1?

enter image description here

Or does my interpretation hardly missing the point?

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Coupling Capacitor of an Antenna

I have a simple question about general meaning & importance of the coupling capacitor in following part of a simple receiver circuit: enter image description here

Is it true that the proper reason why this coupling capacitor C2 sits there is simply because this part of the circuit should form a bandpass-filter C2-L1-C1?

enter image description here

Or does my interpretation hardly missing the point?