Why Choose This Product
The MHC-396-33-4F-153 is a ruggedized 3×3 hybrid combiner matrix designed to provide uncompromised performance in mission-critical communication infrastructure. Operating across an optimized 380-960MHz spectrum, this passive network component seamlessly integrates UHF, TETRA, and public safety sub-1GHz frequencies into a shared antenna path. It boasts an ultra-low 3rd-order passive intermodulation (PIM) rating of ≤-153dBc, which completely safeguards emergency receiver channels from destructive harmonic interference. Capable of handling a heavy 300W of average power per port, the matrix delivers cross-coupled balanced distribution with an excellent port isolation of ≥25dB and a tight VSWR of ≤1.35. Equipped with modern, low-PIM 4.3-10 Female interfaces, this matrix ensures continuous, life-safety-grade uptime in complex tunnel, airport, and building environments.
Electrical Specifications
| Parameters | Specifications |
|---|---|
| Model No. | MHC-396-33-4F-153 |
| Frequency Range | 380 – 960 MHz (UHF / Tetra to Sub-1GHz Low-Band) |
| Insertion Loss | < 7.3 dB (Including Theoretical Split Loss) |
| Dissipative Loss | briefs ≤ 6.0 dB (Internal Cavity Loss) |
| Port Isolation | ≥ 25 dB |
| VSWR | ≤ 1.35 |
| Passive Intermodulation (PIM3) | briefs ≤ -153 dBc (@ 2 * 43 dBm) |
| Average Power | 300 W (Each Port, High-Power Capacity) |
| Nominal Impedance | 50 Ω |
| Connector Type | 4.3-10 Female |
FAQ
- What makes this hybrid coupler ideal for Public Safety DAS and critical networks?
- Unlike commercial cellular components that run on higher frequencies, this matrix handles the lower 380-960MHz band. This frequency block covers UHF radio, TETRA networks, and national public safety bands used heavily by first responders. It ensures that emergency responder signals stay crisp and reliable within high-shielded environments like tunnels, basements, and transit hubs.
- How does a 3×3 matrix handle signal distribution across input and output paths?
- A 3×3 hybrid matrix accepts up to three independent RF signal sources (such as different radio channels or emergency service sectors). The internal circuit cross-couples these lines, splitting the total combined energy evenly across three independent output cables. This guarantees that all three distribution antennas broadcast all three networks simultaneously without cross-talk.
- Why does the specification list both an insertion loss and a dissipative loss?
- By the laws of RF physics, dividing an input signal perfectly three ways splits the power into thirds, creating a natural theoretical splitting loss of 4.77dB per port ($1/3$ power). The listed dissipative loss of ≤6.0dB shows the real-world performance constraint across the broad UHF band, while the total overall hardware insertion loss remains safely constrained below 7.3dB.
- What should be done if an installation uses fewer than 3 inputs or 3 outputs?
- To maintain the rated port isolation (≥25dB), uniform signal balance, and low VSWR, any unused input or output port must be terminated with a high-quality 50Ω dummy load. The attached termination load must be rated to match the power levels handled by that specific branch of the matrix to protect sensitive transmitter hardware.
- Why does this public safety coupler utilize 4.3-10 Female connectors?
- The 4.3-10 connector interface is the modern telecommunications industry standard for low-PIM applications. By completely separating the electrical contact plane from the mechanical torque mechanism, it ensures that the critical ≤-153dBc PIM rating remains stable and uncompromised even if connected cables experience physical shifting, stress, or vibration during maintenance.
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