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Power Meter Based on AD8307

I need an affordable power meter for certain measurements.

For this purpose, I use a low-cost measurement module based on the AD8307, an excellent IC.

Assembled power meter.
Connection to the voltmeter.

Specifications

• Input impedance: 50 ohms
• Usable frequency range: 1 to 30 MHz
• Usable power range: -60 dBm to +10 dBm
• Estimated accuracy: +/- 0.5 dB
• Minimum voltmeter operating voltage: approximately 6.2 V

Components Used

• Power meter module: This module is commonly sold on eBay or AliExpress.
  Useful search terms include: AD8307 Logarithmic Power Detector.
  The PCB is labeled: "RF Power Meter, 0.1 - 600 M -75 ... +16 dBm".
  Typical price: around USD 25.
• Power connector: Included with the power meter module.
• Battery holder: Bulgin BX0033.
• Voltmeter: AliExpress, around USD 1.7. Search terms: Mini Digital Voltmeter DC 3.7V to 30V, 0.28 inch.
• 3D-printed part: See the 3D folder.