Common RF connectors
| Connector | Impedance | Max freq | Coupling | Typical use |
|---|---|---|---|---|
| BNC | 50 or 75 Ω | 4 GHz | Bayonet | Test equipment, video |
| SMA | 50 Ω | 18 GHz | Screw | WiFi, SDR, test gear |
| SMA (precision) | 50 Ω | 26.5 GHz | Screw | mmWave lab |
| SMB | 50 Ω | 4 GHz | Snap | Compact automotive, GPS |
| SMC | 50 Ω | 10 GHz | Screw | Miniature |
| MCX | 50 Ω | 6 GHz | Snap | PC cards, some SDRs |
| MMCX | 50 Ω | 6 GHz | Snap | Very small, earbuds, modules |
| U.FL / IPEX | 50 Ω | 6 GHz | Snap (fragile) | PCB antenna pigtails |
| N-type | 50 or 75 Ω | 11 GHz | Screw | Outdoor, base stations |
| Type F | 75 Ω | 1 GHz | Screw | TV, satellite, cable modem |
| TNC | 50 Ω | 11 GHz | Threaded BNC | Weatherproof amateur |
| DIN 7/16 | 50 Ω | 7.5 GHz | Screw | Cellular base stations |
| 4.3-10 | 50 Ω | 10 GHz | Screw | Cellular — replaces 7/16 |
| 1.85 / 2.4 / 2.92 mm | 50 Ω | 40–70 GHz | Screw | mmWave test |
Mating / reverse polarity
- RP-SMA / RP-TNC (reverse-polarity): swap the pin and socket — used on WiFi gear (FCC-mandated to prevent high-gain antenna swaps).
- Male / female nomenclature refers to the contact, not the coupling nut.
- Torque spec matters: over-torquing SMA ruins the connector. Use a torque wrench (5 in-lb typical).
- Dielectric material limits maximum frequency — airline connectors go highest; PTFE common up to ~26 GHz.
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