RG174 Cable is a compact, lightweight 50-ohm coaxial cable widely used for RF signal transmission, wireless communication, GPS, antennas, test equipment, instrumentation, and electronic systems. Its small diameter and flexible construction make it suitable for applications where space, weight, and routing flexibility are important.
RG174 Cable is designed with a center conductor, dielectric insulation, metallic shielding, and protective outer jacket. The shielding helps reduce electromagnetic interference (EMI) and protects RF signals from external noise. Because of its compact construction, RG174 is commonly selected for internal equipment connections, short RF interconnections, and compact communication systems.
What Is RG174 Cable?
RG174 Cable is a 50-ohm coaxial RF cable designed for transmitting high-frequency electrical signals while maintaining controlled impedance. The coaxial structure keeps the center conductor and shield concentric, helping provide predictable RF performance.
Its small outer diameter allows the cable to be installed in confined spaces where larger coaxial cables may be difficult to route. RG174 is also highly flexible, making it useful for equipment that requires repeated cable routing or compact internal connections.
The exact electrical and mechanical specifications can vary depending on the manufacturer, construction, jacket material, and cable design.
RG174 Cable Construction
The performance of RG174 Cable depends on its layered coaxial construction.
Center Conductor
The center conductor carries the RF signal through the cable. RG174 designs commonly use a stranded or flexible conductor to improve cable flexibility and ease of installation.
Dielectric
The dielectric material surrounds the center conductor and maintains the required spacing between the conductor and shield. This layer contributes to the cable’s impedance, signal propagation characteristics, and electrical performance.
Shielding
A metallic shield surrounds the dielectric and provides protection against electromagnetic interference. The shielding also helps reduce unwanted signal radiation and external noise entering the transmission path.
Outer Jacket
The outer jacket protects the internal cable structure against mechanical handling, abrasion, and environmental exposure. Jacket material and temperature capability depend on the particular RG174 cable construction.
RG174 Cable Specifications
Typical characteristics associated with RG174 Cable include:
| Specification | Typical Description |
|---|---|
| Cable Type | Flexible RF Coaxial Cable |
| Impedance | 50 Ohms |
| Construction | Coaxial |
| Size | Compact, small-diameter design |
| Conductor | Flexible RF conductor |
| Dielectric | Low-loss insulating material |
| Shield | Metallic shielding |
| Application | RF, wireless and electronic systems |
| Flexibility | Highly flexible |
| Connector Options | SMA, BNC, TNC and other RF connectors |
Exact specifications such as attenuation, maximum frequency, temperature range, shielding effectiveness, and dimensions should always be confirmed against the manufacturer’s datasheet.
Key Features of RG174 Cable
Compact Design
One of the main advantages of RG174 Cable is its compact size. It can be routed through small spaces and equipment assemblies where larger coaxial cables are unsuitable.
Flexible Construction
RG174 is designed for flexible routing. This makes it useful for internal equipment wiring, RF modules, antennas, and test connections.
50-Ohm Impedance
The 50-ohm impedance makes RG174 suitable for many RF and microwave signal paths used in communication and electronic equipment.
EMI Protection
The metallic shielding helps reduce the influence of external electromagnetic interference and supports reliable signal transmission in electrically noisy environments.
Lightweight Construction
The compact structure contributes to lower cable weight, which can be beneficial in portable equipment, instrumentation, aerospace electronics, and compact communication systems.
Applications of RG174 Cable
RG174 Cable is used across several RF and electronic applications.
Wireless Communication
It can be used for internal RF connections, wireless modules, radio equipment, and communication electronics.
GPS and Navigation Systems
Compact coaxial cable assemblies can be used to connect GPS antennas and RF modules where flexible routing and small size are required.
Test and Measurement
RG174 is commonly suitable for RF test connections, laboratory equipment, instrumentation, and signal-routing applications where compact flexible cables are required.
Antenna Connections
The cable can be used between RF modules, antennas, receivers, transmitters, and other communication equipment, depending on frequency and attenuation requirements.
Industrial Electronics
Industrial communication and electronic equipment can use RG174 for internal RF interconnections and compact signal paths.
Aerospace and Defense Electronics
Its lightweight and compact construction can be useful in specialized electronic assemblies where cable size and routing flexibility are important. The actual suitability depends on environmental, frequency, temperature, and reliability requirements.
RG174 Cable vs RG188 Cable
RG188 Cable is another 50-ohm RF coaxial cable that may be considered for compact RF applications. Both RG174 and RG188 Cable can be used in RF signal transmission, but their construction, electrical characteristics, dimensions, attenuation, temperature capability, and mechanical properties can differ.
| Feature | RG174 Cable | RG188 Cable |
|---|---|---|
| Impedance | 50 Ohms | 50 Ohms |
| Design | Compact RF coaxial | Compact RF coaxial |
| Flexibility | Flexible | Flexible |
| Applications | RF, wireless, GPS, instrumentation | RF, instrumentation, communication |
| Selection Factor | Size, loss, frequency and flexibility | Temperature, loss, frequency and construction |
The correct choice should be based on the required frequency range, cable length, attenuation, temperature environment, mechanical requirements, and connector configuration rather than cable designation alone.
How to Select the Right RG174 Cable
Before selecting RG174 Cable, consider the following factors:
Frequency: Confirm that the cable supports the operating frequency of your system.
Attenuation: For longer cable runs, evaluate insertion loss carefully because signal loss increases with frequency and cable length.
Impedance: RF equipment should normally use compatible 50-ohm components to maintain proper signal transfer.
Flexibility: Choose a construction appropriate for the required bend radius and installation conditions.
Temperature: Check the specified operating temperature for the actual installation environment.
Connectors: Select compatible connectors such as SMA, BNC, TNC, or other RF interfaces according to the equipment.
Assembly Quality: For critical RF systems, connector termination and assembly quality can significantly affect VSWR, return loss, and overall signal performance.
RG174 Cable Assemblies
RG174 Cable is frequently supplied as a terminated cable assembly with RF connectors installed at one or both ends. Common configurations may include SMA male, SMA female, BNC, TNC, and other connector types.
Custom cable assemblies can also be manufactured according to cable length, connector orientation, connector type, stripping requirements, and application-specific requirements.
Frequently Asked Questions About RG174 Cable
1. What is RG174 Cable?
RG174 Cable is a compact, flexible 50-ohm coaxial RF cable used for wireless communication, GPS, antennas, instrumentation, test equipment, and electronic systems.
2. Is RG174 Cable 50 Ohm?
Yes, RG174 is commonly specified as a 50-ohm coaxial cable for RF applications.
3. What is RG174 Cable used for?
RG174 is used for RF interconnections, GPS systems, wireless equipment, antenna connections, instrumentation, test equipment, and compact electronic assemblies.
4. Is RG174 Cable flexible?
Yes. Its compact construction makes RG174 Cable suitable for flexible routing and installations where space is limited.
5. What connectors are used with RG174 Cable?
Depending on the application, RG174 Cable can be terminated with SMA, BNC, TNC, and other compatible RF connectors.
6. What is the difference between RG174 and RG188 Cable?
Both are commonly used as 50-ohm RF coaxial cables, but their detailed electrical, mechanical, temperature, and construction characteristics can differ. The manufacturer’s specifications should be checked before selection.
7. Can RG174 Cable be used for GPS?
Yes. RG174 can be used in GPS antenna and RF interconnection applications when its frequency range and signal-loss characteristics meet the system requirements.
8. Is RG174 suitable for high-frequency applications?
RG174 can support many RF applications, but suitability depends on the required operating frequency, cable length, attenuation, and system performance requirements.
Conclusion
RG174 Cable provides a compact and flexible solution for 50-ohm RF signal transmission. Its small size, flexible construction, shielding, and broad range of connector options make it useful for wireless communication, GPS, antennas, instrumentation, test equipment, and electronic systems.
When selecting RG174, engineers should evaluate frequency, attenuation, impedance, temperature, flexibility, shielding, connector type, and assembly quality. RG188 Cable can also be considered for applications requiring a similar compact RF cable format, but the final selection should always be based on the specific electrical and environmental requirements of the system.
