Semi-Rigid RF Cables Guide: Types, Structure, and Uses Explained
What Are Semi-Rigid RF Cables?
Semi-rigid RF cables are high-performance coaxial cables designed for stable signal transmission in high-frequency applications, typically ranging from 18 GHz up to 50 GHz.
Unlike flexible cables, semi-rigid cables use a solid outer conductor that provides excellent shielding and consistent electrical characteristics. They can be bent during installation to fit a fixed layout but are not intended for repeated movement.
Available in multiple diameters such as 0.034, 0.047, 0.085, 0.141, and 0.250 inch, semi-rigid cables are widely used in RF modules, test systems, and precision communication equipment where signal integrity and mechanical stability are critical.
0.250-in SR-250 Semi-Rigid RF Cable
The 0.250-inch SR-250 is a semi-rigid cable assembly designed for high-frequency RF and microwave applications up to 18 GHz. It offers a 50 Ω impedance and a low attenuation of 0.22 dB/m at 1 GHz for reliable signal performance.
0.141-in SR-001 Semi-Rigid RF Cable
The 0.141-inch SR-001 is a semi-rigid cable assembly optimized for high-frequency applications up to 34 GHz. It features a 50 Ω impedance and a low attenuation of 0.38 dB/m at 1 GHz, ensuring reliable signal transmission.
0.085-in SR-002 Semi-Rigid RF Cable
The 0.085-inch SR-002 is a semi-rigid cable assembly designed for high-frequency applications up to 50 GHz. It provides 50 Ω impedance and 0.37 dB/m attenuation at 1 GHz, ensuring consistent signal quality.
0.047-in SR-003 Semi-Rigid RF Cable
The 0.047-inch SR-003 is a semi-rigid cable assembly for high-frequency applications up to 50 GHz. It delivers 50 Ω impedance and 1.12 dB/m attenuation at 1 GHz for stable, low-loss performance.
0.034-in SR-004 Semi-Rigid RF Cable
The 0.034-inch SR-004 is a semi-rigid cable assembly suitable for high-frequency applications up to 40 GHz. It features 50 Ω impedance and 1.48 dB/m attenuation at 1 GHz, maintaining reliable signal transmission.
Semi-Rigid RF Cable Specifications
Typical specifications of semi-rigid RF cables include:
- Frequency Range: Up to 18–50 GHz depending on cable size
- Impedance: 50Ω
- Insertion Loss: Approximately 0.22–1.48 dB/m @ 1 GHz
- Outer Diameter: Approximately 0.86 mm to 6.35 mm
- Bending Process: Formable during installation (single bending process)
- Phase Stability: High stability (phase control supported)
- Shielding: Solid outer conductor for excellent EMI shielding
Performance varies depending on cable size (0.034 / 0.047 / 0.085 / 0.141 / 0.250 inch) and structure.
For detailed specifications, please refer to individual product pages.
Semi-Rigid RF Cable Applications
Semi-rigid RF cables are used in applications that require maximum signal stability, shielding performance, and mechanical reliability.
Typical applications include:
- High-frequency RF modules and internal wiring
- Test and measurement equipment
- Microwave and millimeter-wave systems
- Communication infrastructure and RF assemblies
- Aerospace and defense applications
These cables are ideal for installations where the cable routing is fixed and stable performance is required over time.
How to Choose Semi-Rigid RF Cables
When selecting a semi-rigid RF cable, consider the following key factors:
1. Select Cable Diameter
Choose the cable size (0.034 / 0.047 / 0.085 / 0.141 / 0.250 inch) based on your application. Smaller diameters support higher frequencies, while larger diameters offer lower loss and improved mechanical strength.
2. Confirm Frequency Requirements
Ensure the cable supports your required frequency range. Thinner cables typically support higher frequency bands, while thicker cables are optimized for lower loss.
3. Evaluate Insertion Loss
Consider insertion loss based on cable length and signal requirements. Lower loss is essential for high-frequency and precision applications.
4. Consider Bending and Installation
Semi-rigid cables can be bent once during installation to fit a fixed layout. Ensure the bending process and routing are carefully planned, as repeated bending is not recommended.
5. Check Connector Compatibility
Select connectors compatible with your cable size and application, such as SMA, N, 2.92 mm, or SMP connectors.
Semi-Flexible vs Semi-Rigid
Semi-flexible and semi-rigid RF cables are both used in high-frequency applications, but they differ significantly in flexibility, performance, and typical use cases.
Flexibility and Handling
Semi-flexible cables offer moderate flexibility and can be bent more easily during installation, making them suitable for applications requiring some routing adjustments.
Semi-rigid cables use a solid outer conductor and can only be bent once during installation. They maintain their shape and are not suitable for repeated movement.
Electrical Performance
Semi-rigid cables provide superior electrical performance, including better shielding, lower signal loss, and higher phase stability, making them ideal for high-frequency and precision applications.
Semi-flexible cables offer slightly lower performance but provide a good balance between flexibility and electrical characteristics.
Applications and Use Cases
Semi-rigid cables are commonly used in RF modules, test equipment, and high-frequency systems where stability and performance are critical.
Semi-flexible cables are suitable for general RF applications where some flexibility is required during installation but repeated movement is not expected.
Which Cable Should You Choose?
Choose semi-rigid cables when maximum performance, shielding, and stability are required.
Choose semi-flexible cables when ease of handling and installation flexibility are more important.
Semi-Rigid RF Cables FAQs
QWhat frequency range do these cables support?
QWhat frequency range do these cables support?
These cables support frequency bands from 18 GHz to 50 GHz, making them ideal for high-frequency applications requiring precise signal transmission.
QHow many thickness options are available?
QHow many thickness options are available?
There are five different thickness options available, allowing for customization based on specific application requirements and space constraints.
QWhat are the different models of SR cables available?
QWhat are the different models of SR cables available?
Tyclon offers five distinct models of its semi-rigid cables. The product line includes the SR-250, SR-001, SR-002, SR-003, and SR-004 models to meet various technical specifications.
QDo the connectors vary by cable type?
QDo the connectors vary by cable type?
Yes, the applicable connectors differ from cable to cable. It's essential to refer to the detailed page for each cable type to determine compatible connectors.
QWhat is the impedance of these cables?
QWhat is the impedance of these cables?
These semi-rigid cables feature a characteristic impedance of 50 Ω, ensuring compatibility with most RF equipment and minimizing signal reflection.
QWhat is the maximum operating frequency?
QWhat is the maximum operating frequency?
The maximum operating frequency varies by cable type, ranging from 18 GHz to 50 GHz, catering to a wide range of high-frequency applications.
QAre these cables suitable for high-frequency applications?
QAre these cables suitable for high-frequency applications?
Yes, these cables are specifically designed for high-frequency applications, offering low loss and high stability for reliable signal transmission.
QCan the SR cable be custom-bent for specific applications?
QCan the SR cable be custom-bent for specific applications?
Yes, the Semi-Rigid-Cable can be precisely bent into various shapes to meet the specific size and space constraints of your design. This customization is essential for complex systems.
QHow is the Tyclon semi-rigid cable constructed?
QHow is the Tyclon semi-rigid cable constructed?
The cables are made with a central conductor surrounded by an insulator and a metallic shield. This construction ensures stable performance and strong signal transmission at high frequencies.
QWhat is the relationship between cable thickness and attenuation?
QWhat is the relationship between cable thickness and attenuation?
Generally, thicker cables have a lower attenuation rate than thinner ones. This means that larger cables can transmit signals more efficiently with less loss over a given distance.
QHow can I order semi-rigid RF cables, and what support do you offer?
QHow can I order semi-rigid RF cables, and what support do you offer?
Ordering is simple—you can purchase our semi-rigid RF cables directly on our website or contact our sales team for assistance. We also provide comprehensive technical support, including datasheets, CAD models, and application notes, to help you select the ideal connector for your project.
Purchase Guide
Tyclon coaxial connectors and processed coaxial cable products can be purchased directly online using a variety of credit cards.
