RF interconnects — coaxial connectors and cable assemblies — are built to maintain controlled impedance across a defined frequency range. Get the impedance wrong or pick the wrong series for your frequency, and you're adding reflections and loss at every junction.

Most RF work runs on 50Ω: test equipment, antennas, radar, SDR. Video and broadcast use 75Ω. The two are not interchangeable. Some connector series physically mate across impedances, but the mismatch causes signal reflection — keep your system on one standard throughout.

Connector series selection comes down to frequency. SMA covers most microwave work — standard grade to 18 GHz, precision SMA (2.92mm compatible) to 26.5 GHz. Right-angle SMA versions have a lower frequency ceiling than straight due to the geometry. N-type reaches 11–18 GHz and handles higher power in outdoor or weathered installations. BNC is fine for lab bench and video work up to around 4 GHz. For tight PCB-to-PCB connections in dense assemblies, SMP and SMPM push-on connectors keep things compact. MCX and MMCX show up constantly in GPS receivers and wireless modules where board space is limited. Above 26 GHz — millimetre-wave radar, 5G NR, satellite ground equipment — you're into 2.92mm, 2.4mm, or 1.85mm territory.

Key parameters to specify: insertion loss (it accumulates per connector across a test chain), VSWR (1.0 is ideal; anything above 1.5 at your operating frequency warrants attention), power handling, mating cycles, and whether you need a right-angle or vertical PCB mount.

TRX sources RF connectors and cable assemblies from Amphenol RF, Huber+Suhner, Radiall, and Rosenberger through authorised distribution. No minimum order — pull a few to validate your design before committing to production volumes. In-stock lines ship to Johannesburg, Cape Town, Durban, and Pretoria. For parts that need to be sourced, we'll quote you an actual lead time.

Send us your part number or describe the application — we'll come back with availability and pricing.