// RF_KNOWLEDGE_BASE — RF & ANTENNA TUNING
← Back to RF FAQ What effect does a plastic casing near the antenna have on the 2.4GHz resonant frequency?
// RF_DB_QUERY: RESOLVED
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The dielectric permittivity of plastic reduces propagation velocity, shifting the antenna’s resonant frequency lower (Low Shift). Compensate for this during bare-board tuning by offsetting the frequency target slightly higher.
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