A practical guide to SMA, BNC, SMB, MMCX, I-PEX, and custom RF cable assemblies for wireless, antenna, test, and industrial applications.
Why RF Connector Selection Matters
Choosing the right RF connector is important for maintaining signal quality, reducing loss, and improving long-term reliability. Whether your application involves Wi-Fi, Bluetooth, GPS, 4G LTE, 5G, test equipment, antennas, or industrial electronics, the connector and cable assembly must match the electrical, mechanical, and environmental requirements of the system.
At Lighthorse Technologies, we supply RF connectors and custom cable assemblies for a wide range of applications, including compact wireless devices, outdoor installations, test systems, and high-frequency RF designs.
Common RF Connector Types
SMA Connectors
SMA connectors are one of the most widely used RF connector types. They are commonly used in antennas, wireless modules, test equipment, and microwave applications. SMA connectors are known for strong mechanical performance, threaded coupling, and reliable signal transmission.
BNC Connectors
BNC connectors use a bayonet-style locking mechanism, making them quick to connect and disconnect. They are commonly used in test equipment, video systems, antennas, and lower-frequency RF applications.
SMB Connectors
SMB connectors are compact push-on RF connectors designed for applications where space is limited and fast connection is important. They are often used in communication systems, automotive electronics, and internal RF connections.
MMCX Connectors
MMCX connectors are smaller than MCX connectors and are useful in compact wireless designs. They are often selected for portable devices, embedded antennas, and applications where size and weight are important.
I-PEX / MHF Connectors
I-PEX and MHF-style connectors are commonly used in small wireless devices, IoT modules, embedded antennas, and compact electronics. They are often paired with small-diameter coaxial cables such as 0.81mm, 1.13mm, and 1.17mm low-loss cable.
Key Factors When Choosing an RF Connector
1. Frequency Range
Different RF connectors are designed for different frequency ranges. Selecting a connector that supports your required frequency helps reduce signal loss and maintain consistent performance.
2. Impedance
Most RF systems use 50 ohm impedance, while some video and broadcast applications use 75 ohm impedance. Matching impedance between the connector, cable, and device helps reduce signal reflections.
3. Cable Type
The connector must be compatible with the coaxial cable being used. Common cable types include RG-316, RG-178, 1.13mm coax, 1.17mm low-loss coax, and other miniature RF cables.
4. Environmental Protection
Outdoor or harsh-environment applications may require waterproof or dust-resistant solutions. IP-rated connectors, such as IP67-rated SMA cable assemblies, are designed for applications where moisture and debris protection is important.
5. Size and Mounting Style
Space-limited designs may require compact connectors such as MMCX or I-PEX. Panel mount, bulkhead, right-angle, straight, crimp, clamp, and solder styles are also important considerations.
Custom RF Cable Assemblies
In many applications, a standard cable assembly may not meet the exact requirements of the design. Custom RF cable assemblies allow engineers and buyers to choose the connector type, cable type, length, orientation, and environmental rating needed for the application.
Lighthorse Technologies can support custom RF cable assembly needs, including combinations such as SMA to I-PEX, SMA to MMCX, BNC to SMA, TNC to SMA, and many other connector configurations.
Applications for RF Connectors and Cable Assemblies
- Wi-Fi and Bluetooth antennas
- 4G LTE and 5G wireless systems
- GPS and GNSS modules
- IoT and embedded wireless devices
- Test and measurement equipment
- Industrial communication systems
- Outdoor antenna installations
Need Help Choosing an RF Connector?
If you are unsure which connector or cable assembly is right for your application, our team can help you identify the best solution based on frequency, cable type, mounting style, and environmental requirements.