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Visual microwave detector, MVD-A

Authors: Emanoil Surducan, Vasile Surducan

Keywords: microwave radiation, visual detector, power density

Applications

Our research group set out to implement a solution that converts microwave radiation (invisible to the human eye) into the visual domain using a detector, called a visual microwave detector: MVD-A.

Innovative aspects

The proposed solution associates to a microwave power range a specific color from the visible spectrum, through a combination of RGB base colors. The final goal is to realize a matrix area (MVD-A) composed of 64 MVDs for direct visualization of the microwave power density over a given area. In this way, the microwave power density distribution becomes visible through a color map associated with the power density levels obtained by color combination (R-G-B).

The Visual Microwave Detector is used for rapid visual identification of the microwave power density distribution in the environment in the vicinity of an antenna, microwave ovens or other microwave sources (e.g. cell phone). A visual microwave detector (MVD) is a threshold detector in the sense that it associates a specific color from the visible spectrum with a range of microwave power. A given color is associated with the lowest power density value in the range considered and does not change until the power density value exceeds the maximum value of that range. For the MVD-A, eight (8) color thresholds present in a reference scale on the MVD-A have been chosen, with the minimum power density values marked.

Technology

The MVD-A is internally powered by Li-ion batteries. To turn on, the power button is held down for 3 seconds; after 3 minutes of operation the MVD-A is automatically turned off and must be restarted for use. On power-on the power density-color reference scale lights up and the proximity of a microwave source (mobile phone, wi-fi devices, presence radars) in the frequency range of the detector causes a color map to appear over the entire area of the MVD-A.

These power density maps are useful in the characterization of microwave generators/antennas/transmitters and for the assessment of the level of electromagnetic pollution pollution.

Advantages

  • Number of MVD detectors in the area: 64
  • Detection area: 200 × 200 mm2
  • Operating frequency range: 500 MHz ÷ 3 GHz
  • Power density range < 40 μW/m2 ÷ > 500 mW/m2
  • Indication: 8 (eight) microwave power density thresholds correlated with eight colors
  • Data storage possibility (color map) on S-card, mini-USB
  • MVD-A is a portable unit with the footprint size 290 × 210 × 45 mm3
  • Internal power supply from Li-ion batteries, 3.7 V, 8000 mAh, rechargeable from external DC source 6 V, 2 A

Patent

Patent 135000 (A0) / 28.05.2021

Title: Process for visual detection of microwave radiation and visual microwave detector realized by this process
Inventors: Surducan Emanoil, Surducan Vasile

Patent 135909 (A0) / 29.07.2022

Title: Non-addressable asynchronous communication with locking for group of synchronized integrated systems
Inventors: Surducan Vasile, Surducan Emanoil