RG178 Coaxial Cable – Specifications, Features & Applications

Introduction

RG178 Coaxial Cable is a 50-ohm, high-temperature micro RF Cable that is commonly used in compact electronic systems that require space-saving design and dependable signal transmission. RG178, with its PTFE dielectric insulation and silver-plated conductors, provides reliable performance in high-frequency and demanding settings.

This cable is widely used in telecommunications, aerospace systems, test equipment, GPS modules, and wireless communication devices.

What is RG178 Coaxial Cable ?

RG178 is a thin and flexible coaxial cable used for RF signal transmission. It features:

• 50 Ohm impedance.

• Silver-plated copper center conductor.

• PTFE (Teflon) dielectric insulation.

• Silver-plated copper braided shield.

• High-temperature resistant jacket.

Compared to bigger cables such as RG58, RG178 has a smaller diameter, making it suited for use in compact spaces.

Types of RG178 Coaxial Cables :

RG178 cables are available in many configurations according on shielding, assembly type, and application.

1. Standard RG178 Cable

• A single braided shield.

• PTFE dielectric

• Suitable for general RF applications.

2. Double Shielded RG178 Cable

• Enhanced EMI shielding.

• Improved signal integrity

• Suitable for delicate radiofrequency systems.

3. RG178 Cable Assemblies

• Pre-terminated connectors (SMA, BNC, TNC, MMCX, etc.)

• Custom lengths are available.

• Used for antenna and RF module connections.

4. High Flex RG178

• Stranded central conductor.

• Designed for applications that need frequent mobility.

Key features of RG178 coaxial cable

• 50 Ohm impedance.

• Small outer diameter (~1.8 mm).

• PTFE insulation for high temperature resistance.

• Silver-plated conductors for increased conductivity.

• Excellent shielding effectiveness.

• Flexible and lightweight.

• Ideal for high-frequency applications.

• Reliable performance in difficult situations.

Technical Specifications :

Parameter	Specification
Impedance	50 Ohm
Outer Diameter	Approx. 1.8 mm
Conductor	Silver-Plated Copper
Dielectric	PTFE (Teflon)
Shielding	Silver-Plated Copper Braid
Capacitance	~100 pF/m (Typical)
Maximum Frequency	Up to 3–6 GHz (Typical)
Operating Temperature	-55°C to +200°C

Applications for RG178 Coaxial Cable : 

1. RF Communication Systems

• Antenna connectors.

• RF modules

• Signal Transmission Lines

2. Aerospace and Defense

• Avionics Equipment

• Radar systems

• Military communication devices

3. GPS and Wireless Modules.

• GPS antennas

• LTE modules

• WiFi systems

4. Test and Measurement Equipment

• Lab test cables

• Oscilloscopes

• Signal Generators

5. Industrial and Medical Equipment.

• Diagnostic electronics

• Monitoring systems

Why Choose RG178?

RG178 is great for:

• Space is limited.

• High temperature resistance is necessary.

• Stable RF performance is crucial.

• Flexible routing inside the equipment is important.

It strikes a compromise between tiny size and dependable RF performance, making it an ideal choice for miniature high-frequency systems.

Conclusion

RG178 coaxial wire is a high-temperature, 50-ohm RF cable designed for demanding applications that require dependable signal transmission and flexibility. Its PTFE insulation and silver-plated conductors assure consistent performance in aircraft, telecom, wireless, and industrial applications.

For engineers looking for a lightweight, durable, and high-frequency coaxial solution, RG178 remains a reliable industry choice.

Contact Us

Eteily Technologies India Pvt. Ltd.

📫 Address: B28 Vidhya Nagar, Near SBI Bank,
 📍  District: Bhopal, PIN: 462026, Madhya Pradesh
🌐 Website: https://eteily.com

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