Messungen, Experimente und technische Einblicke
Messungen, Experimente und technische Einblicke aus dem Labor.
Don't Route Over Ground Plane Splits — Part 5: Compliance
6. Mai 2026Took the same three boards to an accredited EMC lab. The split board fails Class B by 26.8 dB. The stitching caps recover 25 dB but still fail by 1.8 dB. Only the intact plane passes.
Before the Poor Man's Scanner Gets Retired
10. März 2026One last experiment with the DIY near-field scanner: a 90° wire bend over a ground plane, scanned with H and E probes in multiple orientations.
Don't Route Over Ground Plane Splits — Part 4: Poor Man's 3D Field Patterns
3. März 20263D terrain maps of the H-field above the test boards. Amplitude becomes topography: tall mountains mean strong fields. All three boards on the same scale.
Don't Route Over Ground Plane Splits — Part 3: The Loop and Its Area
17. Feb. 2026A DIY near-field EMC scanner built from a Snapmaker A350 and a Siglent spectrum analyzer reveals the emission pattern of ground plane splits — frequency by frequency, overlaid on the actual board photos.
Don't Route Over Ground Plane Splits — Part 2: Immunity
3. Feb. 2026Part 1 showed that a split ground plane radiates more. Now we flip it around: how much RF does the board pick up? Same test boards, same TEM cell — but this time the signal source feeds the cell and the board is the receiver.
Don't Route Over Ground Plane Splits — Part 1: Emissions
20. Jan. 2026Everyone says not to route traces over splits in ground planes. Two custom microstrip test boards, a TEM cell, and a spectrum analyzer show you exactly what happens when you do.
FFT Analysis of an EFT/Burst Pulse Train
6. Jan. 2026Capturing a full EFT burst train with an oscilloscope, replaying it in LTspice, and comparing the frequency spectrum at 5 kHz and 100 kHz repetition rates.