handheld RF-Powermeter for multiple sensors up to 12 GHz


Posted on Feb 5, 2014

A couple of few years ago I had build a diode-sensor based RF powermeter using a 68HC11 microprocessor. Even before that I had build an analog RF powermeter with thermal power sensor. And I found datasheets of logarithmic amplifiers very interesting, that promised a measurement bandwidth of up to 2. 5GHz. When I had familiarized myself with the Atm


handheld RF-Powermeter for multiple sensors up to 12 GHz
Click here to download the full size of the above Circuit.

el AVR microprocessor family, it was just a logic step to build myself a nice powermeter for all three measurement principles. So I did that and build a very small, battery powered powermeter with external power sensors. I called it UMD, the Universal Measurement Device. It was completely done with tiny surface mount components. Wanna see Click here for a picture. Or here for another picture. Here the UMD is measuring a beacon transmitter with the diode sensor. Unfortunately the device contained a few components that were very had to get (e. g. a mobile phone LCD display) and was so tiny that it was difficult to compare it with my documentation. I had changed the circuit a couple of times during the development, so I could not guarantee that my schematics were correct. When I was asked by some Belgian radio amateurs to write an article for their annual magazine, I decided to rebuild the circuit on a larger board with wired components and a standard 4x16 character LCD display. Lets call that version article-breadboard version. The breadboard was laying around for a few month until I decided that I should rather use it to build myself another power meter. Since I already had the UMD with the external sensors, I have included the sensors now in the meter housing. I had almost never used the log-amp sensor, so I went for a design with only two sensors: a diode sensor and a thermal power sensor. Since it was kind of a third...




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Video title generator
    Stereo headphone amplifier
    Voltage-controlled-filter
    Transistored 10W Audio Amplifier
    Tone ControlCircuit
    Cosimulation with Analog-RF Systems
    How to display text on 16x2 LCD using AVR microcontroller (ATmega16)
    controller
    Automatic water tank level controller motor driver circuit
    Self-powered Sine to Square wave Converters
    Brake lights flasher circuits
    IC Shift Register Chip
    ISL6528 Dual Regulator-Standard Buck PWM and Linear Power Controller
    8051 Development System Circuit Board 4
    Gentleman AM50 amplifier circuit
    Amplifier circuit diagram tda1521



    Top