SMP vs SMPM: Specifications, Key Differences, and Selection Guide
SMP vs SMPM at a Glance — Quick Answer for Engineers
SMP and SMPM are compact 50 Ohm RF coaxial connectors designed for high-frequency and high-density applications. Both use push-on mating and are well suited for compact RF modules, board-to-board connections, and applications where quick and reliable mating is required.
The main differences are size and frequency capability. SMP connectors support frequencies up to 40 GHz, while SMPM connectors are approximately 30% smaller and can support frequencies up to 65 GHz, depending on the connector design and cable assembly.
In general, SMP is a practical choice for compact high-frequency RF systems, while SMPM is better suited for applications requiring higher frequencies and even greater integration density.
Quick Summary
・Purpose: SMP – Compact High-Frequency RF / SMPM – Ultra-Compact High-Frequency RF
・Impedance: Both – 50 Ohm
・Maximum Frequency: SMP – 40 GHz / SMPM – 65 GHz
・Coupling: Both – Push-on / Snap-on
・Size: SMPM is approximately 30% smaller than SMP
・Selection: Choose based on frequency requirements, available space, and mounting density
What Are SMP Connectors?
SMP connectors are miniature 50 Ohm RF coaxial connectors designed for high-frequency applications up to 40 GHz.
Their compact push-on interface allows quick mating without threaded coupling and supports high-density installation in limited spaces. SMP connectors are commonly used for internal equipment wiring, board-to-board connections, RF modules, test equipment, and blind-mate applications.
Specifications
・Impedance: 50 Ohm
・Coupling: Push-on / Snap-on
・Frequency Range: DC to 40 GHz
・Typical Use: RF modules, board-to-board connections, test equipment
What Are SMPM Connectors?
SMPM connectors are ultra-miniature 50 Ohm RF coaxial connectors designed for applications requiring higher frequencies and greater mounting density.
Approximately 30% smaller than SMP connectors, SMPM connectors can support frequencies up to 65 GHz depending on the connector design and cable assembly. Their compact push-on interface makes them suitable for aerospace, satellite communication, test equipment, advanced wireless systems, and high-density RF modules.
Specifications
・Impedance: 50 Ohm
・Coupling: Push-on / Snap-on
・Frequency Range: DC to 65 GHz*
・Size: Approximately 30% smaller than SMP
・Typical Use: High-density RF modules and higher-frequency systems
*Depending on connector design and cable assembly.
Side-by-Side Specification Table
The table below compares the key specifications of SMP and SMPM connectors. Maximum frequency performance may vary depending on the specific connector design and cable assembly.
| Specification | SMP | SMPM | Why It Matters |
|---|---|---|---|
| Primary Purpose | Compact High-Frequency RF | Ultra-Compact High-Frequency RF | Select according to frequency and space requirements. |
| Impedance | 50 Ohm | 50 Ohm | Both are designed for standard 50 Ohm RF systems. |
| Maximum Frequency | DC to 40 GHz | DC to 65 GHz | SMPM supports higher-frequency applications. |
| Coupling Mechanism | Push-on / Snap-on | Push-on / Snap-on | Both enable quick mating without threaded coupling. |
| Connector Size | Compact | Approx. 30% smaller than SMP | SMPM enables higher-density installation. |
| Blind-Mate Capability | Yes | Yes | Suitable for compact systems where direct visual alignment may be difficult. |
| Typical Applications | RF modules, test equipment, board-to-board connections | Aerospace, satellite communications, high-density RF modules, advanced wireless systems | Each is optimized for different frequency and space requirements. |
| Compatibility | SMP Interface | SMPM Interface | Different interface sizes prevent direct mating. |
Key Differences Explained
1. Maximum Operating Frequency
One of the main differences between SMP and SMPM connectors is their maximum operating frequency.
・SMP: Up to 40 GHz
・SMPM: Up to 65 GHz*
SMP provides excellent performance for many microwave and high-frequency RF systems, while SMPM extends frequency capability for more demanding applications.
*Depending on connector design and cable assembly.
2. Connector Size
SMPM connectors are approximately 30% smaller than SMP connectors.
Their ultra-miniature design allows tighter connector spacing and higher mounting density, making SMPM particularly suitable for compact RF modules and equipment where PCB space is limited.
3. Handling and Mating
Both SMP and SMPM connectors use push-on mating, allowing quick connection and disconnection without threaded coupling.
SMP connectors have a slightly larger interface, making them easier to handle and offering slightly better durability for repeated mating. SMPM prioritizes miniaturization and high-density integration.
4. Typical Applications
SMP
・RF modules
・Board-to-board connections
・RF test and measurement equipment
・Microwave communication equipment
・Aerospace and defense systems
SMPM
・High-density RF modules
・Aerospace and defense systems
・Satellite communications
・High-frequency test equipment
・Advanced wireless communication systems
Are SMP and SMPM Compatible?
No.
Although SMP and SMPM connectors use similar push-on mating concepts, their interface dimensions are different.
SMPM connectors are significantly smaller than SMP connectors, so the two interfaces cannot be directly mated.
When connecting equipment using SMP and SMPM interfaces, an appropriate between-series adapter should be used.
How to Choose Between SMP and SMPM
1. Choose SMP when...
・Frequencies up to 40 GHz are sufficient.
・A compact push-on RF interface is required.
・Board-to-board or blind-mate connections are used.
・Ease of handling is important.
・Repeated mating and unmating is expected.
2. Choose SMPM when...
・Frequencies above 40 GHz are required.
・Operating frequencies up to 65 GHz are needed.
・PCB space is extremely limited.
・Higher connector density is required.
・Ultra-compact RF modules are being designed.
Technical Specifications Summary
The table below summarizes the key differences between SMP and SMPM connectors, including frequency performance, size, and typical applications. Maximum frequency may vary depending on the connector design and cable assembly.
| Item | SMP | SMPM |
|---|---|---|
| Primary Application | Compact High-Frequency RF Systems | Ultra-Compact High-Frequency RF Systems |
| Maximum Frequency | DC to 40 GHz | DC to 65 GHz |
| Impedance | 50 Ohm | 50 Ohm |
| Coupling | Push-on / Snap-on | Push-on / Snap-on |
| Connector Size | Compact | Approx. 30% Smaller than SMP |
| Blind-Mate | Yes | Yes |
| Typical Equipment | RF modules, test equipment, board-to-board systems | High-density RF modules, aerospace, satellite and advanced wireless systems |
| Compatibility | SMP Only | SMPM Only |
SMP vs SMPM FAQs
QWhat is the main difference between SMP and SMPM connectors?
QWhat is the main difference between SMP and SMPM connectors?
The main differences are connector size and frequency capability. SMP connectors support frequencies up to 40 GHz, while SMPM connectors are approximately 30% smaller and can support frequencies up to 65 GHz depending on the design.
QAre SMP and SMPM connectors directly compatible?
QAre SMP and SMPM connectors directly compatible?
No. Although both use push-on mating, SMP and SMPM have different interface dimensions and cannot be directly connected.
QWhich connector supports higher frequencies?
QWhich connector supports higher frequencies?
SMPM offers the higher frequency capability, supporting frequencies up to 65 GHz depending on the connector design and cable assembly. SMP connectors typically support frequencies up to 40 GHz.
QIs SMPM smaller than SMP?
QIs SMPM smaller than SMP?
Yes. SMPM connectors are approximately 30% smaller than SMP connectors, allowing tighter spacing and higher connector density in compact RF equipment.
QDo SMP and SMPM connectors use threaded coupling?
QDo SMP and SMPM connectors use threaded coupling?
No. Both use push-on / snap-on mating rather than threaded coupling, allowing quick connection and disconnection in compact RF systems.
QWhich connector is better for high-density RF modules?
QWhich connector is better for high-density RF modules?
SMPM is generally better suited for extremely high-density designs because of its smaller interface. SMP remains a practical choice when compact size, easier handling, and high-frequency performance up to 40 GHz are sufficient.
QHow do I choose between SMP and SMPM?
QHow do I choose between SMP and SMPM?
Choose SMP for compact RF systems requiring performance up to 40 GHz and easier handling. Choose SMPM when higher frequencies, smaller size, or greater mounting density are required.
Purchase Guide
Tyclon coaxial connectors and processed coaxial cable products can be purchased directly online using a variety of credit cards.
