Bingfu 4G LTE Antenna Adapter Splitter Cable SMA Female to Dual SMA Male Cable 15cm 6 inch Compatible with 4G LTE Wireless Router CPE Hotspot Cellular Gateway Industrial IoT Router Mobile Modem

The Bottom Line: An excellent, high-quality splitter for SDR enthusiasts looking to consolidate antennas or create a clean demarc box entry point without signal-integrity issues. The SDR Setup: I used this adapter to bridge two separate SDR sticks into a single antenna feed. My specific application involved mounting a rubber duck antenna onto a demarc box. For this kind of "tinker" project, cable flexibility and connector tolerances are everything, and this cable nailed both. Key Performance Observations: Bulkhead Compatibility: The SMA Female connector features a solid enough shoulder and threading to work perfectly as a bulkhead mount. It cinches down tight to the enclosure wall without stripping or spinning. Build Quality: Often, these thin 15cm jumpers have flimsy heat shrink or loose crimps. These feel industrial-grade—the connections are secure, and the 6-inch length provides just enough "play" to manage cable routing inside a tight box without kinking. Signal Integrity: Even when splitting the feed to two sticks, I didn't notice any significant dB loss or interference that wasn't expected. The SMA Male ends fit snugly into the SDR ports with a satisfying, precise thread-on. Pros vs. Cons: | Feature | Observation | | :--- | :--- | | Mounting | Female end works great as a secure bulkhead. | | Flexibility | 15cm is the "sweet spot" for internal enclosure routing. | | Durability | Solid crimps; can handle being detached/reattached frequently. | | Cons | The cable is somewhat stiff (typical for high-shielding), so plan your bends. | Who is this for? Ideal for SDR (Software Defined Radio) hobbyists, IoT developers building outdoor gateway enclosures, or anyone needing to consolidate dual-LTE antenna ports on a cellular router into a single high-gain antenna.

ADSB and Air VHF

Well built and reliable

got this to combing 1 antenna for 2 RTL-SDRs works perfect for this application.

I must have not read the dimensions closely. The product is well made and would have been helpful for my application, but the connects were smaller than regular sized coax cable. I returned the item.