Rf Power Meter Schematic

It is even possible to use the directional coupler and detector diodes from an old cellular phone.

Rf power meter schematic. Turd rf wattmeter schematic. Pictures of a homebrew 2 4 ghz rf power meter swr meter. Rf decibel power meter description. These take a small amount of power which is rectified and passed to a meter to provide a reading.

Although you might consider the. It is possible to make high frequency rf power swr standing wave ratio meters using homebrew directional couplers and other easily available parts. The circuit uses a dual op amp as a simple peak detector with the capacitor c1 holding the peak voltage between pulses. The diagram shows a simple swr bridge or swr reflectometer circuit.

Qrp circuits for measuring rf voltage rf current rf power swr circuit schematic schema wiring diagram diy project schaltbild shema. The power meter the cornerstone of the power meter circuit shown in figure 1 is an analog devices ad8307an logarithmic amplifier ic u1. Swr bridge covering hf to vhf circuit schematic schema wiring diagram diy project schaltbild shema. Mini circuits is a global leader in the design and manufacturing of rf if and microwave components from dc to 86ghz.

Here is the schematic diagram of this rf strength meter circuit. 50 mhz frequency counter voltage meter swr pwr indicator circuit schematic schema wiring diagram diy project schaltbild shema. The measurand quantity to be measured is applied to pin 8 inp of ic1 via input socket k1 and capacitor c1. Rf programmable attenuators digital step attenuators from mini circuits provide precise level control from 0 to 120 db for applications up to 40 ghz with easy connection via usb ethernet rs232 and spi interfaces.

Swr reflectometer bridge circuit. It has two directional coupler lines running parallel to the main through rf power line. The schematic diagram of the peak detector circuit connected between the rf power detector board and the display board is shown below. To use turn on transmitter and meter.

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. 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. A tap circuit supplements the power meter extending the upper limit by 40 db allowing measurement of up to 100 w 50 dbm. Rf power meter components forward reflected sensor meter rf in rf out x x directional coupler.

Adjust c1 for peak reading.