Field Strength Meter Circuit

Designed by andy collison.

Field strength meter circuit.

H ere is a handy field strength meter that can be used to check the strength of am radio signals the circuit is a very useful for those who assemble radio transmitters especially in the tuning of the final stage for maximum range. Field strength meter here is a handy field strength meter that can be used to check the strength of am radio signals. The wavemeter circuit with a rectifier meter indicator as shown in fig. With its own small antenna it is essentially a simple receiver with an indicator.

Field strength meter this is a wide band signal strength meter circuit which responds to small changes in rf energy designed to be used for the vhf spectrum and will respond to am or fm modulation or just a plain carrier wave. The circuit is essentially some sort of a am receiver it self. D1 and d2 act as both rectifier and voltage doubler. Here is one example of this kind of circuit that works for 2 4 ghz band.

The circuit is a very useful for those who assemble radio transmitters especially in the tuning of the final stage for maximum range. Field strength meter fsm by mixing recent and legacy technology. This circuit can be used to detect magnetic field strength of radio signal and common radio transmitting signal through antenna. Using this fs meter one can quickly determine whether the problem lies on the transmitter or the receiver module.

It is commonly used by model airplane builders to check whether their transmitter are really transmitting the radio signal. An optional amplifier can be inserted after the rectification so it can be used to boost small signal. Field strength meter circuit simple field strength meter circuit is designed by using single transistor and few easily available components. Schottky and germanium diodes are used for their low forward voltage 0 2 v to 0 4 v and fast switching speed.

This article describes a portable 90 db dynamic range rf fsm that is simple to build. Field strength meter is a must have equipment if you re dealing with radio transmitter electronics. Vhf field strength meter this is a simple and low cost wide band vhf field strength meter. A field strength meter is used to align an antenna to get the best possible gain to determine the transmitting range of radio controllers.

In comparison to the traditional basic diode detector type fsm this minimal component count instrument can be used to measure field strengths over a much wider dynamic range and with much. This simple circuit measures the strength of a radiated signal from a transmitter. If you typi cally run the legal limit you may be able to get by with some run of the mill silicon pn diodes. 10 2 a is often equipped with a small whip antenna and is called as a field strength meter.