Diy Rf Power Meter. The fsm we are going to make is a very simple one that we will use to detect the relative rf power being transmit. Let s turn our ordinary digital multimeter into an rf field strength meter fsm. Here is yet another ad8307 based rf power meter which adds an opamp to produce a dc output voltage of 1mv dbm e g 0mv 0dbm 10mv 10dbm etc.
2 4 ghz rf power meter swr meter. It is even possible to use the directional coupler and detector diodes from an old cellular phone.
Rf attenuator is a simple resistor divider that allows ad8307 rf power meter to measure higher rf power than 2w.
How should rf power be measured. Let s turn our ordinary digital multimeter into an rf field strength meter fsm. The rf power in dbm can be read directly with a multimeter and i ve found it particularly useful for measuring rf filter response when combined with a sweep generator and an oscilloscope. To determine power we need independent measurements of voltage and current 5 4 2012.
