Rf Power Meter Circuit

The cornerstone of the power meter circuit shown in figure 1 is an analog devices ad8307an logarithmic amplifier ic u1. Rf microwave power meter includes. 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.

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Rf power meters or wattmeters are used for measuring power in rf circuits.

Rf power meter circuit.

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 measurand quantity to be measured is applied to pin 8 inp of ic1 via input socket k1 and capacitor c1. Rf decibel power meter description. A tap circuit supplements the power meter extending the upper limit by 40 db allowing measurement of up to 100 w 50 dbm.

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. Adjust c1 for peak reading. Here is the schematic diagram of this rf strength meter circuit. Power can be measured in a variety of ways dependent upon the application.

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. Although you might consider the. To use turn on transmitter and meter.

Rf power meter pep average pulse power power measurement techniques in line power meter absorption power meters sensors. 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.