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- Phone：+86 17702828378
- WeChat：+86 17702828378
- WA：+86 17702828378
- Mail：sales@yusntech.com
- Address：Room 3, Floor 1, Building 13, No. 69, East Section of Hangkong Road, Dongsheng Subdistrict, Shuangliu District, Chengdu City, Sichuan Province.
Dual Directional Couplers
Yusntech Dual Directional Couplers are precision RF and microwave components designed for simultaneous forward and reflected power monitoring in high-performance communication systems. Covering frequencies from 130 kHz to 18 GHz with coupling values up to 55 dB and power handling up to 1000 W, these couplers provide low insertion loss, high directivity, and excellent measurement accuracy. Ideal for radar, SATCOM, wireless infrastructure, aerospace, defense, EMC testing, and RF power monitoring applications. Custom designs are available.
Features
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Wideband coverage (kHz to 18 GHz)
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Low insertion loss, high directivity
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High power handling up to 1000 W
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Compact, rugged SMA/N/SC options
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Customization supported (OEM/ODM)
Applications
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RF amplifier monitoring
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VSWR & reflected power measurement
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Antenna system testing
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Lab & production validation
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Microwave subsystem integration
Model↑↓ | Freq. (GHz) | Coupling (dB) | IL. (dB) | VSWR (max.) | Power (W) | Connector | Inquiry |
|---|---|---|---|---|---|---|---|
| YSDDC200-4K-R1-40-S | 4 KHz-0.1 | 40±1.0 | 0.25 | 1.2 | 200 | SMA | Inquiry |
| YSDDC300-4K-R4-40-S | 4 KHz-0.5 | 40±1.0 | 0.4 | 1.25 | 300 | SMA | Inquiry |
| YSDDC250-4K-R7-40-S | 4 KHz-0.7 | 40±1.5 | 0.45 | 1.35 | 250 | SMA | Inquiry |
| YSDDC200-130K-R3-40-S | 130 KHz-0.3 | 40±1.0 | 0.3 | 1.2 | 200 | SMA | Inquiry |
| YSDDC1K-20M-1-50-G | 0.02-1 | 50±1.5 | 0.3 | 1.2 | 1000 | SC-Type / SMA | Inquiry |
| YSDDC500-30M-R52-50-N | 0.03-0.52 | 50±1.0 | 0.2 | 1.2 | 500 | N-Type / SMA | Inquiry |
| YSDDC100-80M-1-45-S | 0.08-1 | 45±1.2 | 0.5 | 1.3 | 100 | SMA | Inquiry |
| YSDDC1K-80M-1-50-N | 0.08-1 | 50±1.0 | 0.3 | 1.3 | 1000 | N-Type / SMA | Inquiry |
| YSDDC200-R3-R7-30-S | 0.3-0.7 | 30±1.0 | 0.3 | 1.2 | 200 | SMA | Inquiry |
| YSDDC100-R3-2-40-S | 0.3-2 | 40±1.0 | 0.3 | 1.35 | 100 | SMA | Inquiry |
| YSDDC10-R3-4-40-S | 0.3-4 | 40±2.0 | 0.5 | 1.25 | 10 | SMA | Inquiry |
| YSDDC30-R35-2-40-S | 0.35-2 | 40±1.0 | 0.35 | 1.3 | 30 | SMA | Inquiry |
| YSDDC300-R35-2-40-N | 0.35-2 | 40±1.0 | 0.3 | 1.25 | 300 | N-Type / SMA | Inquiry |
| YSDDC100-R5-3-50-S | 0.5-3 | 50±1.5 | 0.5 | 1.3 | 100 | SMA | Inquiry |
| YSDDC250-R5-6-40-N | 0.5-6 | 40±1.0 | 0.5 | 1.25 | 250 | N-Type / SMA | Inquiry |
| YSDDC300-R5-6-40-N | 0.5-6 | 40±1.5 | 0.5 | 1.25 | 300 | N-Type / SMA | Inquiry |
| YSDDC50-1-4-30-S | 1-4 | 30±1.0 | 0.35 | 1.2 | 50 | SMA | Inquiry |
| YSDDC200-2-6-40-N | 2-6 | 40±1.0 | 0.3 | 1.3 | 200 | N-Type / SMA | Inquiry |
| YSDDC500-2-6-40-N | 2-6 | 40±1.0 | 0.3 | 1.3 | 500 | N-Type / SMA | Inquiry |
| YSDDC80-2-6-55-S | 2-6 | 55±1.0 | 0.3 | 1.5 | 80 | SMA | Inquiry |
| YSDDC80-2-8-45-S | 2-8 | 45±1.0 | 0.4 | 1.4 | 80 | SMA | Inquiry |
| YSDDC50-2-18-30-S | 2-18 | 30±1.0 | 0.6 | 1.5 | 50 | SMA | Inquiry |
| YSDDC50-3-18-40-S | 3-18 | 40±1.0 | 0.55 | 1.45 | 50 | SMA | Inquiry |
| YSDDC500-3R3-3R8-50-N | 3.3-3.8 | 50±2.0 | 0.3 | 1.3 | 500 | N-Type / SMA | Inquiry |
| YSDDC120-6-10-40-N | 6-10 | 40±1.0 | 0.3 | 1.4 | 120 | N-Type / SMA | Inquiry |
| YSDDC250-6-18-40-N | 6-18 | 40±1.0 | 0.5 | 1.4 | 250 | N-Type / SMA | Inquiry |
| YSDDC80-6-18-35-S | 6-18 | 35±1.0 | 0.5 | 1.5 | 80 | SMA | Inquiry |
FAQ
A dual directional coupler is an RF and microwave passive component designed to simultaneously sample both forward and reflected signals within a transmission line. Unlike a standard directional coupler, it provides independent monitoring of transmitted and reflected power, making it ideal for RF power monitoring, VSWR measurement, antenna testing, and system diagnostics. Dual directional couplers are widely used in radar systems, satellite communications, wireless infrastructure, and RF test equipment.
A standard directional coupler typically monitors power in one direction, while a dual directional coupler measures both forward and reverse signals simultaneously. This capability allows engineers to accurately evaluate reflected power, return loss, impedance matching, and antenna performance. Dual directional couplers are commonly used in applications requiring real-time RF system monitoring and transmitter protection.
Dual directional couplers enable accurate measurement of forward and reflected power, which are essential parameters for calculating Voltage Standing Wave Ratio (VSWR). Continuous VSWR monitoring helps identify impedance mismatches, cable faults, connector issues, and antenna problems before they impact system performance. This makes dual directional couplers valuable in high-reliability communication and defense systems.
Yusntech offers dual directional couplers covering frequencies from 130 kHz to 18 GHz. These broadband RF couplers support applications across HF, VHF, UHF, L-band, S-band, C-band, X-band, and Ku-band systems. Custom frequency ranges can also be developed to meet specialized radar, aerospace, defense, and SATCOM requirements.
Our dual directional couplers are available with coupling factors ranging from 30 dB to 55 dB. The appropriate coupling value depends on signal sampling requirements, operating power levels, and measurement sensitivity. Higher coupling values minimize signal disturbance, while lower values provide stronger sampled signals for monitoring and testing purposes.
Dual directional couplers are widely deployed in satellite communication systems, radar installations, aerospace electronics, defense platforms, wireless base stations, RF power amplifiers, EMC testing laboratories, semiconductor test environments, and microwave research facilities. They are essential components wherever accurate RF power measurement and signal monitoring are required.
Yes. Yusntech offers high-power dual directional couplers with power handling capabilities up to 1000 watts. These couplers are suitable for high-power transmitters, radar systems, satellite ground stations, RF power amplifier testing, and industrial microwave equipment requiring reliable power monitoring and protection.
Yusntech dual directional couplers are available with SMA, N-Type, and other industry-standard RF connectors. Connector selection depends on operating frequency, power requirements, environmental conditions, and system integration needs. Custom connector configurations are available for specialized applications.
Important specifications include operating frequency range, coupling factor, directivity, insertion loss, VSWR, power handling capability, connector type, and environmental requirements. High directivity and low insertion loss are especially important for achieving accurate RF power measurements and minimizing signal degradation in critical communication systems.
Yes. Yusntech specializes in custom RF and microwave dual directional couplers tailored to customer requirements. We can customize frequency coverage, coupling values, power ratings, connector interfaces, mechanical configurations, and environmental specifications for aerospace, defense, SATCOM, telecom, and RF test and measurement applications.
High-directivity dual directional couplers improve the accuracy of forward and reflected power measurements by minimizing unwanted signal leakage between coupled ports. This results in more reliable VSWR calculations, enhanced antenna characterization, improved transmitter monitoring, and greater confidence in RF system performance.
In radar and SATCOM applications, dual directional couplers are used to continuously monitor transmitter output power, reflected power, antenna matching, and overall system efficiency. Their ability to provide real-time RF performance data helps improve reliability, reduce maintenance costs, and protect critical communication equipment from damage caused by excessive reflections.