As a leading professional manufacturer of RF passive products, Hefei Bri Electronic & Technology Co.,Ltd provides mission-critical solutions for passive Distributed Antenna Systems (DAS). Our 300W Directional Coupler (350-6000MHz), operating effectively as a high-tier RF power tapper (Model: BRT-3560-XX-161-4F), is built to distribute signals seamlessly across modern wireless networks. Engineered with a rugged IP65 enclosure for indoor and outdoor use, and equipped with 4.3-10 Female connectors, this unit is designed to handle a power rating of 300W while weighing under 0.3 kg.
Detailed Application in Distributed Antenna Systems (DAS)
In a complex building or tunnel DAS, keeping signal levels balanced across varying cable lengths is a massive engineering challenge. Power tappers solve this by acting as an unequal power divider. Instead of splitting a signal symmetrically (50/50), a tapper pulls a specific, unequal ratio of the RF energy from the main feeder line to serve a nearby antenna, allowing the bulk of the power to continue down the trunk line to reach more distant antennas. This cascading methodology is essential for maintaining uniform cellular coverage throughout high-rise buildings, underground parking garages, and large transit hubs.
Electrical Specifications
| Model No. | BRT-3560-XX-161-4F | ||||||||
| Frequency Range(MHz) | 350~6000MHz | ||||||||
| Power Rating(W) | 300W | ||||||||
| Weight(kg) | ≤0.3 | ||||||||
| Impedance(Ω) | 50 | ||||||||
| IP Class | IP65 | ||||||||
| Connectors | 4.3-10-F | ||||||||
| Temperature(℃) | -25~+65 | ||||||||
| PIM(dBc) | -161dBc@2x43dBm | ||||||||
| Ratio(dB) | Output Split(dB) | Ripple in-band(dB) | Max Input VSWR | ||||||
| 350-380MHz | 380-520MHz | 698-960MHz | 1710-2700MHz | 3500-4500MHz | 4900-6000MHz | 698-2700MHz | 350-6000MHz | ||
| 2:1/3.0dB | -1.8/-4.8 | +0/-1.3 | +0.3/-1.0 | ±0.5 | ±0.5 | +0/-1.5 | ±0.5 | 1.3:1 | 1.4:1 |
| 3:1/4.8dB | -1.3/-6.1 | +0/-1.3 | +0.3/-0.8 | ±0.5 | ±0.5 | ±0.5 | ±0.5 | 1.2:1 | 1.3:1 |
| 4:1/6.0dB | -1.0/-7.0 | +0/-1.3 | +0.3/-0.8 | ±0.5 | ±0.5 | ±0.6 | ±0.5 | 1.2:1 | 1.3:1 |
| 6:1/8.0dB | -0.7/-8.6 | +0/-1.3 | +0.3/-0.5 | ±0.5 | ±0.5 | ±0.6 | ±0.5 | 1.2:1 | 1.3:1 |
| 10:1/10.4dB | -0.4/-10.4 | +0/-1.3 | +0.3/-0.5 | ±0.5 | ±0.5 | ±0.6 | ±0.6 | 1.2:1 | 1.3:1 |
| 20:1/13.2dB | -0.2/-13.2 | ±1.0 | ±0.6 | ±0.6 | ±0.6 | +0/-1.5 | ±0.6 | 1.2:1 | 1.3:1 |
| 30:1/15dB | -0.1/-15.1 | ±1.0 | ±0.7 | ±0.7 | ±0.7 | +0/-1.5 | ±1.0 | 1.2:1 | 1.3:1 |
| 100:1/20dB | -0.1/-20.1 | ±1.0 | ±1.0 | ±1.0 | ±0.7 | +2.0/-0 | +4.0/-0 | 1.2:1 | 1.25:1 |
| 1000:1/30dB | -0.1/-30.1 | ±1.0 | ±1.5 | ±1.0 | ±0.7 | +2.0/-1.0 | +4.0/-0 | 1.2:1 | 1.25:1 |
The 350-6000MHz Wideband Advantage vs. 698-3800MHz
Standard RF distribution networks rely on traditional 698-3800MHz tappers, which only accommodate existing 4G and 5G cellular frequencies. Our advanced BRT-3560-XX-161-4F breaks this limitation by delivering a true wide frequency band covering 350-6000MHz. This massive spectrum upgrade means the system can support critical UHF/VHF and TETRA bands (starting at 350MHz) for emergency responder networks, while also future-proofing your DAS infrastructure for upcoming high-frequency 6G cellular bands. You get complete, unified network compatibility in a single passive component.
The Critical Importance of Low PIM
Passive Intermodulation (PIM) occurs when two or more RF signals mix within a passive component, generating interference that can blind cellular receivers. For a high-quality DAS, maintaining an ultra-low PIM rating is absolutely critical. This unit delivers guaranteed PIM compliance with a phenomenal rating of -161dBc@2x43dBm (comfortably exceeding the -160dBc industry standard). This pristine performance ensures maximum data throughput and clarity for both life-saving public safety comms and dense 5G/6G data streams.
RF Coupler vs. RF Tapper: Understanding the Difference
While often used interchangeably in field deployments, an rf coupler and an RF power tapper function differently. A directional coupler uses parallel transmission lines to siphon power; it is strictly directional and offers high isolation against reverse-traveling signals. Conversely, a power tapper utilizes capacitive coupling. It functions as a non-directional unequal divider, meaning it will pass signals identically in both directions without reverse isolation. Tappers are generally more cost-effective, offer broader wideband capabilities (like our 350-6000MHz range), and are highly resilient in multi-carrier DAS environments where directionality is not required.
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