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_maxim_
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I anticipate immediately that I am not sure if this is the right place to ask my question, in case I had made a mistake I would migrate willingly into the relevant area.
I have an RF circuit on small PCB board (about 3x2 cm) that moves along a vertical axis in a measuring probe (it serves essentially to capture RF data in the presence of magnetic fields).
Now the point is that for each "quote" reached by the circuit for the point of measurement, it would be advisable to connect an RLC circuit sized appropriately; the moving part remains fixed and that contains a linear coil, the resonant circuits (capacitors and capacitors) would have to be changed.
Given that at each position the frequency response of the entire circuit is fixed, and that can change from a few hundred MHz to a few tens of MHz, it is not conceivable to use a single broadband circuit for the whole excursion.
My idea would be to connect in some way (yes, but which one ??) the PCB to different circuits, cut in frequency based on the chosen odds.
I have no idea how it can be done given the frequencies involved. The power transmitted along the line (adapted to 50 ohms) is of the order of watts or at most a few tens of watts in transmission and microwatt or less in reception; the problem for which I can not see solutions is: how to connect the PCB to the various circuits?
Is it conceivable a kind of controlled switch able to select only one RF channel at a time, without introducing substantial losses?
I had thought about creeping contacts, but here too: how to make them?
Thank you for your attention and I will try to provide further details if my request was not clear.
Best
I have an RF circuit on small PCB board (about 3x2 cm) that moves along a vertical axis in a measuring probe (it serves essentially to capture RF data in the presence of magnetic fields).
Now the point is that for each "quote" reached by the circuit for the point of measurement, it would be advisable to connect an RLC circuit sized appropriately; the moving part remains fixed and that contains a linear coil, the resonant circuits (capacitors and capacitors) would have to be changed.
Given that at each position the frequency response of the entire circuit is fixed, and that can change from a few hundred MHz to a few tens of MHz, it is not conceivable to use a single broadband circuit for the whole excursion.
My idea would be to connect in some way (yes, but which one ??) the PCB to different circuits, cut in frequency based on the chosen odds.
I have no idea how it can be done given the frequencies involved. The power transmitted along the line (adapted to 50 ohms) is of the order of watts or at most a few tens of watts in transmission and microwatt or less in reception; the problem for which I can not see solutions is: how to connect the PCB to the various circuits?
Is it conceivable a kind of controlled switch able to select only one RF channel at a time, without introducing substantial losses?
I had thought about creeping contacts, but here too: how to make them?
Thank you for your attention and I will try to provide further details if my request was not clear.
Best
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