coaxial RF connector is an electrical connector designed
to work at radio frequencies in the multi-megahertz range.
RF connectors are typically used with coaxial cables and
are designed to maintain the shielding that the coaxial
Types of RF Connectors
1. 7/16 DIN connector, a high power 50
£[ connector originally developed by Spinner
BNC (bayonet Neill-Concelman)
F connector, used for domestic television
installations and domestic satellite LNBs (75 £[) world
HN connector, a high voltage version of
the N connector.
N connector (Neill). The N connector (in
full, Type N connector) is a threaded RF connector used
to join coaxial cables. It was one of the first connectors
capable of carrying microwave-frequency signals, and was
invented in the 1940s by Paul Neill of Bell Labs, after
whom the connector is named.
TNC connector (threaded Neill-Concelman).
The TNC (threaded Neill-Concelman) connector is a threaded
version of the BNC connector. The connector has a 50 £[
impedance and operates best in the 0¡V11 GHz frequency spectrum.
It has better performance than the BNC connector at microwave
frequencies. Invented in the late 1950s and named after
Paul Neill of Bell Labs and Carl Concelman
UHF connector (e.g., PL-259/SO-239). Also
referred to as an M-type connector by Japanese manufacturers
such as Kenwood.
Miniature BNC connectors
2. Miniature UHF connectors
3. DIN 47223 connectors
4. IPX connector
5. SMZ connector - System 43 (BT43 and High Density
HD43) for use in DDF
MMCX connector. MMCX (micro-miniature coaxial)
connectors are coaxial RF connectors similar to MCX but
smaller. They conform to the European CECC 22 000 specification.
The connectors have a lock-snap mechanism allowing 360-degree
rotation and usually have a 50 £[ impedance. They offer
broadband capability from DC to 6 GHz.
MMCX connectors are most commonly seen on Wi-Fi PCMCIA cards
as antenna connectors or as connectors for external GPS
antennas on small devices like PDAs or GPS receivers. They
were developed in the 1990s.
2. MCX connector. MCX (micro coaxial) connectors
are coaxial RF connectors developed in the 1980s. They have
the same inner contact and insulator dimensions as the SMB
connector but are 30% smaller. MCX is standardized in European
They use a snap-on interface and usually have a 50 £[ impedance
(occasionally 75 £[ also) . They offer broadband capability
from DC to 6 GHz. The contact surfaces are gold-plated.
This type of connector is used on the Apple Airport Extreme
Base Station's external antenna port and requires an adapter
for most antennas. MCX and the smaller MMCX connector are
frequently used to connect external antennas to GPS receivers.
The outer diameter of the plug is approx 3.6 mm or 0.140
3. FME connector. FME (For Mobile Equipment)is
a miniature 50£[ RF connector series offering excellent
performance from DC to 2.0 GHz used with primarily with
RG-58 or equivalent coaxial cables employed in mobile applications
and installations. The FME female is designed to allow cables
it has been installed on to be snaked through the often
tight access holes or spaces of a vehicle to the desired
equipment location(s) where an FME male adapter to the required
equipment connector series is fitted to the female cable
connector. There is an extensive array of FME inter-series
adapters available and a male cable connector is also offered
for both RG-58 and RG-174 type cables to facilitate extensions,
splices or transitions.
SMA connector, including variants: 3.5
and 2.92 mm connectors, which cross-mate with SMA, and 2.4,
1.85 and 1.0 mm connectors, which do not cross-mate with
SMB connector. SMB (SubMiniature version
B) connectors are coaxial RF connectors developed in the
1960s. SMB connectors are smaller than SMA connectors.
They feature a snap-on coupling and are available in either
50 £[ or 75 £[ impedance. They offer excellent electrical
performance from DC to 4 GHz.
Connectors are available for two SMB cable sizes:
1.Cable 2.6/50+75 S (3 mm outer / 1.7 mm inner diameter)
2.Cable 2/50 S (2.2 mm outer / 1 mm inner diameter)
6. SMC connector