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I read the Wikipedia definition of a Hemholtz coil and am puzzled a bit as to its capabilities.
It says it can be used to cancel Earth's magnetic field (used in magnetometer designs).
What I am wondering is - say I have a known nearby electromagnetic field at a known frequency. Can a Hemholtz coil or some other variation be used to make an active shield for anything within its boundaries? Would it have to be designed to cancel a specific frequency or is there a generic solution (other than ferrite or mu-metal).
It says it can be used to cancel Earth's magnetic field (used in magnetometer designs).
What I am wondering is - say I have a known nearby electromagnetic field at a known frequency. Can a Hemholtz coil or some other variation be used to make an active shield for anything within its boundaries? Would it have to be designed to cancel a specific frequency or is there a generic solution (other than ferrite or mu-metal).