VGTU Phase II & III (2017–2018): Interference Mechanism Confirmed — 20% Field Reduction in Reflection Mode; 2W Excitation Threshold Identified
Phases II and III of the VGTU resonator-converter testing program. Phase II revealed the interference mechanism — incident and R-C-reflected waves create a product wave with different frequency and phase. Phase III extended findings across device types and configurations.
Program Overview: Three Phases of VGTU Testing
| Phase | Year | Focus | Key Result |
|---|---|---|---|
| Phase I | 2016 | Electric field amplitude vs. distance; 3 R-C types | 27% average field reduction at 0.9–2.5 GHz (transmission mode) |
| Phase II | 2017 | Optical properties; interference mechanism; group R-C effects | 20% amplitude reduction (reflection mode); 2W excitation threshold |
| Phase III | 2018 | Expanded R-C types; multi-device groups; near/far-field zones | Confirms Phase I & II; extends to group configurations |
The Interference Mechanism (Phase II Discovery)
Phase I established that resonator-converters reduce measured field strength. Phase II explained why: the resonator-converter (R-C) does not simply block or absorb the incident EM wave. Instead:
- The incident EM wave interacts with the R-C’s self-affine diffraction grating surface
- Some energy of the incident wave is reflected from the R-C surface
- The incident wave and the reflected wave from the R-C interfere with each other
- The interference product is a new EM wave with frequency and phase different from both the incident and reflected waves
Phase II Results: Optical Reflection Mode
Excitation Threshold: Minimum 2W Required
Phase II: Group R-C Effects
Phase II also tested groups of multiple R-Cs of the same type (devices) vs. a single R-C, measuring combined effects across the 0–8 GHz frequency band. The group configuration modifies the interference pattern due to multi-source superposition, with different damping profiles depending on spacing between devices and distance to the receiver.
Phase III Confirmation and Extensions
Phase III (2018) extended the multi-stage program by:
- Confirming Phase I and II findings across additional R-C types and sizes
- Expanding group R-C testing to include mixed-type configurations
- Measuring near-field (distance <10λ) and far-field (distance >10λ) separately, with precise distance ranges for each testing scenario
- Using the same experimental setup (Signal Hound Spectrum Analyzer, 100 Hz–8 GHz, FFT analysis) for direct comparability with Phase I and II data
Phase III conclusions confirm that the interference mechanism first characterized in Phase II operates consistently across the tested frequency range and R-C configurations, with maximum efficiency consistently observed in optical reflection mode at ≤3λ from the receiver.
Institution: VGTU Photovoltaic Technology Laboratory, Vilnius | Team: Dainius Jasaitis, Prof. Artūras Jukna | Years: 2017–2018
← Phase I report | ← Technology explanation | ← All research