Description
The SMB Female to Female coupler acts as a transparent bridge between two SMB Male connectors. The SMB (SubMiniature version B) interface is smaller than SMA connectors and is designed for applications requiring frequent mating cycles or where space constraints prevent the use of threaded connectors. This adapter is a staple in wireless base stations, automotive infotainment, and radio board testing.
Constructed with high-quality gold-plated or nickel-plated brass, these adapters ensure excellent electrical conductivity and resistance to corrosion. The PTFE (Teflon) dielectric provides high insulation and helps maintain a stable 50 Ohm impedance, minimizing signal reflections and VSWR up to 4 GHz. Some versions are available as bulkhead mounts, allowing for clean installations through panels or enclosures.
Key Technical Advantages
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Efficient Snap-On Connection: The tool-free snap-fit interface allows for instant connection and disconnection, perfect for high-speed production or test environments.
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Stable RF Performance: Optimized for a constant 50 Ohm signal path with low insertion loss across the entire DC to 4 GHz range.
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Compact Subminiature Profile: Significantly smaller than BNC or N-type connectors, enabling high-density connector arrays on panels and PCBs.
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Corrosion Protection: Gold-plated center contacts and bodies provide a reliable electrical link that resists oxidation over hundreds of mating cycles.
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Bulkhead Mounting Options: Many couplers include a nut and washer for panel-mount applications, providing a professional entry/exit point for RF signals.
Key Features
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Adapter Type: Straight / In-Series Coupler (Jack-to-Jack).
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Interface: 2x SMB Female (Jack).
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Impedance: 50 Ohm.
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Mating System: Snap-On coupling.
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Body Plating: Gold or Nickel-Plated Brass.
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Common Applications: GPS antennas, telecommunications equipment, automotive RF, and laboratory test manifolds.
Technical Summary
| Parameter | Specification (Typical) |
| Impedance | 50 Ohm |
| Frequency Range | DC to 4 GHz |
| VSWR | ≤ 1.3:1 (Typical) |
| Body Material | Gold-Plated or Nickel-Plated Brass |
| Dielectric | PTFE (Teflon) |
| Mating Cycles | ≥ 500 Insertions |










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