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FrankJ777
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I've been self studying microwave engineering for a little while, and also I work in the radio telecommunications field. I try to relate what I've learned in the book to what I encounter in out in the field. Recently I was studying resonant cavities. From what I thought I understood about them, they need to be an integer multiple of the electrical half-wavelength to accommodate the electric field zero at the conductor walls. I notice at work we commonly use duplexes, bandpass and reject filters, that in the literature says they are quarter wave cavities. Can anyone explain how a quarter wave cavity would work, as it don't think there would be a zero electric field at the conducting walls.
Thanks
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