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An absorption wavemeter is a device which can make measurements on the strength of radio emissions and so this instrument is an essential item for investigating the mobile phone. In principle an absorption meter is a simple device that can be constructed from an antenna, a diode, and a meter. This simple circuit lacks sensitivity though and so measurements can only be made very close to the transmitter. The circuit described here incorporates an amplifier whose gain can be set by just one resistor. Gains of say x 10 can easily be obtained, thereby greatly improving the usefulness of the meter.
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- Knovation Readability Score: 4 (1 low difficulty, 5 high difficulty)
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