Coaxial probes are indispensable tools for validating high-frequency circuits, antennas, and semiconductor devices, offering precise signal transmission with minimal loss. At Petra Carbon, we design high-performance coaxial probes that meet the demands of 5G, aerospace, and IoT industries, ensuring accurate measurements from DC to millimeter-wave frequencies. This guide explores coaxial probe types, applications, and how Petra Carbon empowers engineers to tackle modern RF challenges.
What Is a Coaxial Probe?
A coaxial probe is a specialized test interface that connects RF/microwave test equipment (e.g., network analyzers, oscilloscopes) to devices under test (DUTs). Its coaxial structure—featuring a central conductor, dielectric insulator, and outer shield—ensures 50Ω/75Ω impedance matching and minimal signal reflection.
Key Features of Petra Carbon’s Coaxial Probes:
Frequency Range: DC to 110 GHz for 5G, radar, and satellite systems.
Durability: Tungsten carbide tips withstand 100,000+ contact cycles.
Compatibility: Works with Keysight, Rohde & Schwarz, and Anritsu systems.
Explore our test probe catalog for precision solutions.
Types of Coaxial Probes
Semi-Rigid Coaxial Probes
Use Case: On-wafer RFIC and MMIC testing in semiconductor labs.
Features:
– Stainless steel construction for mechanical stability.
– SMA or 2.92mm connectors for seamless integration.
Pair With: Test fixtures for repeatable measurements.
Flexible Coaxial Probes
Use Case: Probing PCBs in constrained spaces (e.g., IoT devices, drones).
Features:
– Braided outer shield for bend resistance.
– Gold-plated tips for low contact resistance (<30mΩ).
High-Temperature Probes
Use Case: Automotive radar (77 GHz) and aerospace thermal testing.
Features:
– Operates at -55°C to +200°C.
– Ceramic dielectric for minimal loss at extreme temps.
Applications of Coaxial Probes
5G & mmWave Testing
Validate beamforming antennas and RF front-end modules up to 110 GHz.
Integration: Use with Keysight network analyzers for S-parameter analysis.
Aerospace & Defense
Test phased array radars and satellite communication systems for MIL-STD-461 compliance.
Medical Devices
Ensure signal integrity in MRI machines and wireless implantable devices.
Automotive Radar
Characterize 77/79 GHz radar sensors for ADAS applications.
How to Choose the Right Coaxial Probe
| Factor | Consideration |
| Frequency Range | Match probe specs to DUT requirements (e.g., 110 GHz for 6G R&D). |
| Tip Geometry | Crown, spear, or blade tips for varied pad/pin sizes. |
| Calibration | Use flange alignment tools for precise probe positioning. |
Pro Tip: Pair probes with RF connectors to minimize impedance mismatches.
Why Petra Carbon’s Coaxial Probes Excel
Precision Engineering: Probes are validated using in-circuit test systems for <0.1dB insertion loss.
Custom Solutions: Adjustable pitch (50μm–2.5mm), custom connector types, and impedance matching.
Global Compliance: Meets IPC, IEEE, and RoHS standards.
FAQs About Coaxial Probes
What’s the maximum frequency a coaxial probe can handle?
Petra Carbon offers probes up to 110 GHz for mmWave and 6G research.
How do I clean coaxial probe tips?
Use isopropyl alcohol and a microfiber cloth. Avoid abrasive materials to prevent tip damage.
Can probes be used for high-power RF testing?
Yes! We offer probes rated up to 10W average power for radar applications.
At PetraCarbon, we engineer coaxial probes to deliver unmatched accuracy in RF, microwave, and high-speed digital validation.
🔗 Contact Us for expert guidance or explore our Coaxial Probe Catalog.
Unmatched accuracy!
