Differential probing for wafer, PCB and mixed-mode characterization with GSSG and GSGSG contact geometries from DC to 145 GHz.
GSSG vs GSGSG — choose by DUT pad geometry
Both configurations support differential measurements. The correct choice is primarily defined by the DUT pad order and ground arrangement, not by frequency alone.
GSSG
Ground–Signal–Signal–Ground places the differential signal pair between the two outer ground contacts.
GSGSG
Ground–Signal–Ground–Signal–Ground adds an interleaved center ground contact between the two signal contacts.
Differential RF probe models by frequency
Choose the required bandwidth first, then confirm GSSG or GSGSG contact geometry, pitch, tip variant and RF interface.
40 GHz Differential Probes
GSSG and GSGSG configurations for differential PCB, wafer and signal-integrity characterization.
67 GHz Differential Probes
GSSG and GSGSG models for mixed-mode analysis, high-speed interconnects and mmWave structures.
110 GHz Differential Probes
GSSG and GSGSG probing for W-band, advanced SerDes, PCB and wafer-level differential characterization.
145 GHz Differential Probes
Selected GSSG and GSGSG models for D-band differential device and interconnect characterization.
GSSG / GSGSG model selection
Compare core, adjustable and fine-tip differential probe models by configuration, frequency, pitch, tip radius and RF interface.
GSSG Core Models
| Model / Series | Config | Frequency | Pitch Range | Tip Radius | Connector | Action |
|---|---|---|---|---|---|---|
| VST-40G-GSSG-XXXLYRA | GSSG | DC–40 GHz | 100–1250 µm | 25 / 50 µm | 2.92 mm Female | |
| VST-67G-GSSG-XXXLYRA | GSSG | DC–67 GHz | 100–1250 µm | 25 / 50 µm | 1.85 mm Female | |
| VST-110G-GSSG-XXXLYRA | GSSG | DC–110 GHz | 100–1250 µm | 25 / 50 µm | 1.00 mm Female | |
| VST-145G-GSSG-XXXD-BAND | GSSG | DC–145 GHz | 100–1250 µm | See drawing | 0.8 mm Female |
GSSG Adjustable & Fine-Tip Variants
| Model / Series | Config | Frequency | Pitch Range | Tip Radius | Connector | Action |
|---|---|---|---|---|---|---|
| VST-40G-GSSG-XXX-AJLYRAAJ | GSSG | DC–40 GHz | 100–1250 µm | 25 / 50 µm | 2.92 mm Female | |
| VST-67G-GSSG-XXX-AJLYRAAJ | GSSG | DC–67 GHz | 100–1250 µm | 25 / 50 µm | 1.85 mm Female | |
| VST-40G-GSSG-XXX-LFAQUILA | GSSG | DC–40 GHz | 100–1250 µm | 10 µm | 2.92 mm Female | |
| VST-67G-GSSG-XXX-LFAQUILA | GSSG | DC–67 GHz | 100–1250 µm | 10 µm | 1.85 mm Female | |
| VST-110G-GSSG-XXX-LFAQUILA | GSSG | DC–110 GHz | 100–1250 µm | 10 µm | 1.00 mm Female |
GSGSG Core Models
| Model / Series | Config | Frequency | Pitch Range | Tip Radius | Connector | Action |
|---|---|---|---|---|---|---|
| VST-40G-GSGSG-XXX | GSGSG | DC–40 GHz | 100–1250 µm | 25 / 50 µm | 2.92 mm Female | |
| VST-67G-GSGSG-XXX | GSGSG | DC–67 GHz | 100–1250 µm | 25 / 50 µm | 1.85 mm Female | |
| VST-110G-GSGSG-XXX | GSGSG | DC–110 GHz | 100–1250 µm | 25 / 50 µm | 1.00 mm Female | |
| VST-145G-GSGSG-XXXD-BAND | GSGSG | DC–145 GHz | 100–1250 µm | See drawing | 0.8 mm Female |
GSGSG Fine-Tip Variants
| Model / Series | Config | Frequency | Pitch Range | Tip Radius | Connector | Action |
|---|---|---|---|---|---|---|
| VST-40G-GSGSG-XXX-LFAQUILA | GSGSG | DC–40 GHz | 100–1250 µm | 10 µm | 2.92 mm Female | |
| VST-67G-GSGSG-XXX-LFAQUILA | GSGSG | DC–67 GHz | 100–1250 µm | 10 µm | 1.85 mm Female | |
| VST-110G-GSGSG-XXX-LFAQUILA | GSGSG | DC–110 GHz | 100–1250 µm | 10 µm | 1.00 mm Female |
Replace “XXX” with the required pad pitch. Confirm GSSG or GSGSG contact order against the DUT drawing before ordering. Custom pitch options are subject to model and DUT geometry.
RF Probe Selection Guide
Use the current guide for detailed GSSG / GSGSG model coverage, pitch and tip options, D-band models, probe cards and calibration-substrate reference.
Differential Probe Selection Questions
What is the difference between GSSG and GSGSG?
GSSG uses a G–S–S–G contact order. GSGSG adds a center ground contact, giving a G–S–G–S–G arrangement. Selection should follow the DUT pad geometry and required ground structure.
When should I choose GSGSG instead of GSSG?
Choose GSGSG when the DUT includes an interleaved center ground between the differential signal contacts or when the measurement structure specifically requires that center-ground arrangement.
How should I specify differential probe pitch?
Provide the full DUT pad order and center-to-center contact spacing together with the target frequency. A drawing or close-up image is recommended before ordering.
What information is needed for model selection?
Provide the required configuration, target frequency, DUT pad layout, pitch and DUT type. Non-standard geometries should include a drawing or close-up image.
Engineering Review for Differential RF Probe Selection
Send the required GSSG or GSGSG pad layout and target frequency. Vinstronics can review pitch, tip variant, RF interface and model suitability before quotation.