RF Directional Coupler
RF Directional Couplers are passive RF devices used to split, monitor, combine, and distribute RF signals with minimal insertion loss in telecom and microwave communication systems. These couplers are widely used in RF testing, DAS, IBS, wireless communication, antenna systems, and telecom infrastructure where accurate signal sampling and stable RF performance are essential.
At SRFS Teleinfra, we manufacture and supply premium-quality RF Directional Couplers engineered for low insertion loss, high isolation, low PIM performance, and reliable signal transmission across broadband telecom frequency ranges. Our directional couplers are designed using advanced RF technology and precision manufacturing standards to ensure stable performance in demanding indoor and outdoor RF applications.
Our RF directional couplers support multiple frequency ranges including 138–960 MHz, 698–2700 MHz, and 698–4000 MHz, making them suitable for 2G, 3G, 4G LTE, 5G, DAS, IBS, microwave communication, and RF testing applications. These couplers are available in various coupling values such as 5dB, 6dB, 7dB, 10dB, 12dB, 15dB, 20dB, and 30dB configurations.
What is an RF Directional Coupler?
An RF Directional Coupler is a four-port passive RF device used to couple a defined amount of electromagnetic power from one transmission line to another while maintaining signal directionality. It allows monitoring, signal sampling, and power distribution without significantly affecting the main RF signal path.
Directional couplers are commonly used in telecom communication systems, RF laboratories, DAS networks, microwave systems, and antenna installations for signal measurement and RF power management.
Features of RF Directional Coupler
- Low insertion loss performance
- High isolation between ports
- Stable RF signal sampling
- Wide frequency range support
- Low PIM RF performance
- High power handling capability
- Excellent VSWR characteristics
- Durable IP-rated construction
- Suitable for indoor and outdoor installations
- Reliable RF signal distribution
Types of RF Directional Couplers
5dB RF Directional Coupler
Used for RF signal sampling and telecom signal monitoring applications.
10dB RF Directional Coupler
Provides balanced RF signal coupling for DAS and wireless communication systems.
20dB RF Directional Coupler
Designed for high-isolation signal monitoring and RF testing applications.
Low PIM Directional Coupler
Engineered for 4G LTE and 5G telecom systems requiring minimal signal interference.
Air Dielectric RF Directional Coupler
Provides stable high-power RF performance for telecom and IBS installations.
Technical Specifications
| Parameter | Specification |
|---|---|
| Frequency Range | 138 MHz – 6000 MHz |
| Impedance | 50 Ohm |
| Coupling Values | 5dB, 6dB, 7dB, 10dB, 15dB, 20dB, 30dB |
| VSWR | ≤ 1.25 |
| PIM | Up to -165 dBc |
| Power Handling | Up to 1500W Peak |
| Connector Type | N Female / 4.3-10 Female |
| Isolation | High Isolation Performance |
| Operating Temperature | -40°C to +80°C |
| Protection Grade | IP65 |
Applications of RF Directional Coupler
RF directional couplers are widely used across telecom and RF industries including:
- 4G LTE & 5G Telecom Networks
- DAS (Distributed Antenna Systems)
- IBS (In-Building Solutions)
- RF Signal Monitoring Systems
- Antenna Signal Distribution
- RF Testing & Measurement Equipment
- Microwave Communication Systems
- Wireless Communication Networks
- Broadcasting Systems
- Telecom BTS Installations
Key Performance Factors
Choosing the right RF Directional Coupler depends on several important RF performance parameters:
- Frequency range compatibility
- Coupling value requirements
- Low insertion loss performance
- Isolation characteristics
- Low PIM performance
- Power handling capability
- Connector compatibility
- Environmental durability and IP protection
Proper RF directional coupler selection ensures stable signal distribution, accurate RF monitoring, reduced interference, and reliable telecom network performance.
RF Directional Coupler Product Specifications
| Directional Coupler Type | Impedance | Frequency Range | Application |
|---|---|---|---|
| 5dB RF Directional Coupler | 50 Ohm | 698–4000 MHz | RF Signal Monitoring Systems |
| 10dB RF Directional Coupler | 50 Ohm | 698–3800 MHz | DAS & Wireless Communication |
| 15dB Low PIM Directional Coupler | 50 Ohm | 550–6000 MHz | 4G LTE & 5G Telecom Systems |
| 20dB Air Dielectric Coupler | 50 Ohm | 617–3800 MHz | IBS & Telecom Installations |
| 30dB High Isolation Coupler | 50 Ohm | 350–3800 MHz | RF Testing & Microwave Systems |
Why Choose us
Low PIM RF Performance
Our RF directional couplers are engineered for low passive intermodulation to ensure stable and interference-free telecom communication.
Wide Frequency Support
Suitable for broadband RF applications including 2G, 3G, 4G LTE, 5G, DAS, and microwave communication systems.
Excellent Signal Isolation
Designed for accurate RF signal sampling with high isolation and minimal insertion loss.
High Power Handling Capability
Supports high RF power transmission for telecom BTS, DAS, and RF communication networks.
Frequently Asked Questions
An RF directional coupler is a passive RF device used to sample, split, or monitor RF signals in telecom and microwave communication systems.
They are widely used in DAS systems, IBS installations, RF testing equipment, telecom networks, and antenna signal distribution systems.
RF directional couplers support various frequency ranges from 138 MHz up to 6000 MHz depending on the application.
Coupling values such as 5dB, 10dB, 20dB, and 30dB define how much signal power is coupled from the main transmission line.
Low PIM minimizes signal interference and improves telecom network performance in 4G LTE and 5G communication systems.
Most RF directional couplers are designed with standard 50 Ohm impedance.
Common connector types include N Female and 4.3-10 Female RF connectors.
Yes, many RF directional couplers are designed with IP65-rated weatherproof construction for outdoor telecom installations.
A directional coupler samples part of the RF signal with directional properties, while a power splitter divides the signal equally among output ports.
SRFS Teleinfra offers premium-quality RF directional couplers with low PIM performance, high isolation, durable construction, and reliable telecom RF connectivity solutions.