Нелинейный локатор
Схема нелинейного локатора
Нелинейный локатор (Нелинейный детектор)
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A Non-Linear Junction Detector (NLJD) is well-known method of detecting hidden transmitters and/or other electronics (even when powered off) by transmitting a clean, low-power 900 MHz signal and displaying the received signal strengths of the returned second (1800 MHz) and third (2700 MHz) harmonics. By comparing the received harmonic's signal strengths, an operator can distinguish between a dissimilar metal non-linear junction, such as some rusty nails, or an actual PN junction, such as a diode or transistor. That's the idea at least.
In theory, one could covertly scan a person from a distance to observe them for any signs of dissimilar metal non-linear junctions. This could be an indication the person is carrying nails, ball bearings, etc. which have been used in making bombs. Or maybe, it's just two touching paper clips...
Block Diagrams

Схема нелинейного локатора

Схема нелинейного локатора

Схема нелинейного локатора

Схема нелинейного локатора
Frequency Layout
Transmitter - Fundamental : 908.8 MHz
Transmitter - 2nd Harmonic : 1817.6 MHz
Transmitter - 3rd Harmonic : 2726.4 MHz

1st LO - 2nd Harmonic Receive : 2246.4 MHz
1st LO - 3rd Harmonic Receive : 2297.6 MHz
1st IF : 428.8 MHz

2nd LO : 439.5 MHz
2nd IF : 10.7 MHz
Schematics
Under Construction
Схема нелинейного локатора 1(Нелинейный детектор)
Схема нелинейного локатора 2(Нелинейный детектор)
Схема нелинейного локатора 3(Нелинейный детектор)
Схема нелинейного локатора 4(Нелинейный детектор)