Rf Power Meter Circuit

The circuit diagram of the decibel meter in figure 1 stands out by its simplicity which is due to the type ad8307 monolithic demodulating logarithmic amplifier ic1 from analog devices.

Rf power meter circuit.

Rf power meter pep average pulse power power measurement techniques in line power meter absorption power meters sensors. Power can be measured in a variety of ways dependent upon the application. Although you might consider the. 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.

The power meter the cornerstone of the power meter circuit shown in figure 1 is an analog devices ad8307an logarithmic amplifier ic u1. 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. Rf power meters or wattmeters are used for measuring power in rf circuits. The measurand quantity to be measured is applied to pin 8 inp of ic1 via input socket k1 and capacitor c1.

Although you might consider the ic as slightly expensive at about 10 in single quantities its cost is justified by the wide dynamic range and outstanding accuracy offered. This circuit is another radio frequency rf field strength meter similar with our previous field strength meter circuit but with lower supply voltage only a single cell 1 5v battery. Rf microwave power meter includes. To use turn on transmitter and meter.

A tap circuit supplements the power meter extending the upper limit by 40 db allowing measurement of up to 100 w 50 dbm. Adjust c1 for peak reading.