SMP Coaxial RF Connectors, extended-range designs up to 40 Ghz
SMP connectors are compact RF coaxial connectors designed for high-frequency, board-to-board applications with limited space. They feature a push-on coupling mechanism and blind-mate capability.
Overview
Available in a variety of PCB, cable and adapter configurations, SMP RF connectors support frequencies from DC to 26.5 GHz, with extended-range designs available up to 40 GHz. Their compact footprint, mechanical durability and ability to accommodate slight axial and radial misalignment make SMP connectors well suited for Broadband, Aerospace, Defense and Instrumentation.
Features and Benefits
- Supports frequencies from DC to 26.5 GHz, with extended-range SMP designs available up to 40 GHz
- The miniature design helps engineers maximize PCB density and minimize interconnect footprint
- SMP connectors accommodate axial and radial misalignment, simplifying connections between closely spaced PCBs
- Tool-free push-on mating enables fast installation and removal where frequent access is required.
- Designed for controlled 50 Ω RF signal transmission and reliable signal integrity.
Key Technical Details
- Impedance: 50 Ω controlled
- RF frequency: Up to 40 GHz (dependent on cable/PCB layout)
- Blind‑mate coupling: Push‑on interface, no tools required
- Mechanical strength: High retention and contact force
- Surface finish: Gold-plated for enhanced conductivity
Applications
- High-density radar, communications and electronic warfare systems
- Instrumentation, test fixtures and modular measurement equipment
- Coaxial cable broadband, fixed wireless access and satellite
- Wireless modules and communications equipment
- Quantum computing
- MRI machines, ultrasound machines and CT scanners
Explore our catalog of SMP standard connectors, compatible SMP Adapters and SMP Cable Assemblies. For custom centerline offsets, plating options or unique configurations, contact our expert team, we’re ready to help tailor a solution to your needs.
Specifications
SMP Connectors
Electrical
| Impedance | 50 Ohm |
| Frequency Range | DC - 26.5 GHz (DC - 40 GHz on Extended Range Designs) |
| Voltage Rating | 335 Volts RMS Max Continuous |
| Dielectric Withstanding Voltage | 500 VRMS Min |
| VSWR (Return Loss) |
|
|
DC - 18 GHz
|
1.2 (-21 dB) Max |
|
18 - 26.5 GHz
|
1.3 (-18 dB) Max |
|
26.5 - 40 GHz
|
1.7 (-12 dB) Max |
| Insulation Resistance | 5000 MΩ Min |
| Center Contact Resistance | 6 mΩ Max |
| Outer Contact Resistance | 2 mΩ Max |
| RF Leakage | -85 dB Max (DC - 4 GHz) |
| Insertion Loss | .1 √(f(GHz)) dB Max |
| Power Handling | 32 W @ 1 GHz @ 25ºC |
Environmental
| Temperature Range | −65°C to +165°C |
| Thermal Shock | MIL-STD-202, Method 107, Condition C |
| Corrosion | MIL-STD-202 Method 101 (Test Condition B) - 5% Salt Solution |
| Vibration | MIL-STD-202, Method 204, Condition B |
| Mechanical Shock | MIL-STD-202, Method 213, Condition B |
| Moisture Resistance | MIL-STD-202, Method 106, Condition D |
Mechanical
| Mating Cycles | 100 Min |
| Coupling Mechanism | Push-On |
| Interface Specification | MIL-STD-348 |
| Engagement Force | ≤ 15.0 lbs (40 N) |
| Disengagement Force | ≤ 0.5 lbs (2N) |
| Mechanical Misalignment |
|
|
Axial
|
0.25 mm |
|
Radial
|
0.51 mm |
|
Min Board to Board Distance
|
9.1 mm |
Note: These characteristics are typical and may not apply to all connectors.
Connector configurations may affect performance.
Frequently Asked Questions About SMP Connectors
What is an SMP connector?
An SMP connector is a compact, 50 ohm RF coaxial connector designed for high-frequency applications where space is limited. SMP connectors feature a push-on coupling mechanism that enables quick, tool-less mating and are commonly used for board-to-board, cable-to-board and modular RF interconnect applications.
What is a blind-mate SMP connector?
A blind-mate SMP connector is designed to mate reliably when the connectors cannot be precisely aligned during assembly. SMP board-to-board systems use bullet adapters and floating connections to accommodate axial and radial misalignment, making them useful for densely packaged and modular electronic systems.
Are SMP connectors 50 ohm?
Yes. SMP connectors are designed as 50 ohm RF interconnects to provide controlled impedance and reliable signal integrity in high-frequency applications. Amphenol RF SMP connectors feature a controlled 50 ohm contact system for demanding RF and microwave applications.
Are SMP connectors suitable for harsh environments?
SMP connectors are designed for demanding RF applications and can provide reliable mechanical and electrical performance across a broad range of environmental conditions. Amphenol RF's SMP specifications include temperature, vibration, mechanical shock, corrosion and moisture-resistance testing.
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