N-Type
Understanding N-Type Connectors
The N-type connector is one of the oldest and most reliable RF connectors still in widespread use. Its larger size provides higher power handling and more rugged mechanical performance than SMA. The precision 7mm version (APC-7) is the primary calibration standard for many metrology laboratories.
N-Type Variants
- Standard N: DC-11 GHz. 50 ohms. Most common. Threaded coupling with 5/8-24 UNEF thread.
- Precision N: DC-18 GHz. Tighter tolerances for metrology applications.
- 75-ohm N: Same outer dimensions but different center conductor diameter. Used in cable TV and broadcast.
- Weatherproof N: O-ring seals for outdoor installations. IP67 rated.
Key Specifications
- Frequency: DC-11 GHz (standard), DC-18 GHz (precision)
- Impedance: 50 ohms (standard) or 75 ohms
- Power: 300-500 watts average (at 1 GHz)
- VSWR: < 1.07 (precision), < 1.3 (standard at 11 GHz)
Frequently Asked Questions
What is an N-type connector?
N-type is a medium-size RF connector rated to 11-18 GHz. It is larger than SMA, handles higher power (300-500W), and is weatherproof. It is the standard for antenna connections, base stations, and outdoor RF installations.
When should I use N-type instead of SMA?
Use N-type when you need: higher power handling (>100W), outdoor/weatherproof connections, more rugged mechanical coupling, or precision calibration (7mm/APC-7). Use SMA when small size and frequencies above 11 GHz are needed.
Are N-type connectors weatherproof?
N-type connectors have inherently good weather resistance due to their threaded coupling. With O-ring seals and properly applied weatherproofing tape or boots, they achieve IP67 ratings suitable for permanent outdoor antenna installations.