Low Cost Microwave Power Meter Device

Abstract

Radio frequency power measurement is a broad topic that has been of importance to designers, operators and users. With today’s complex modulation schemes, increased popularity of wireless transmission and pulsed communication modes, the need to accurately and efficiently measure RF power has become crucial to achieve certain regularity steps to restrict and to prevent the usage of communication devices in prohibited places like exam holes and for data securing purposes. Therefore, the objective of the paper is to develop and to implement a low cost microwave frequencies signal power measuring device with a frequency range of 100MHz- 2.5GHz which covers the communications bands of VHF, UHF, CDMA, GSM 900, GSM 1800, Bluetooth and Wi-Fi. The development and the implementation is achieved by utilizing AD8313 IC, LM9314, Arduino Uno, Arduino Liquid Crystal Display  (LCD), vibrator motor and solar cell power supply. The developed microwave signal power measurement system works successfully with the detection range greater than 10 m with detection sensitivity to the power of signal ranging from -70 dbm to +10 dbm.