Micro-miniature coaxial (MMCX) connectors are
coaxial
In geometry, coaxial means that several three-dimensional linear or planar forms share a common axis. The two-dimensional analog is ''concentric''.
Common examples:
A coaxial cable has a wire conductor in the centre (D), a circumferential ou ...
RF connector
An RF connector (radio frequency 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 t ...
s similar to
MCX but smaller. They conform to the European CECC 22000 specification. MMCX connectors are rated to 500 mating cycles. The connectors have a lock-snap mechanism allowing 360-degree rotation and usually have a 50 Ω
impedance. They offer broadband capability from
DC to 6
GHz
The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), often described as being equivalent to one event (or Cycle per second, cycle) per second. The hertz is an SI derived unit whose formal expression in ter ...
.
MMCX connectors are seen on
Wi-Fi
Wi-Fi () is a family of wireless network protocols based on the IEEE 802.11 family of standards, which are commonly used for Wireless LAN, local area networking of devices and Internet access, allowing nearby digital devices to exchange data by ...
PCMCIA
The Personal Computer Memory Card International Association (PCMCIA) was an industry consortium of computer hardware manufacturers from 1989 to 2009. Starting with the PCMCIA card in 1990 (the name later simplified to ''PC Card''), it created v ...
cards as antenna connectors or as connectors for external
GPS
The Global Positioning System (GPS) is a satellite-based hyperbolic navigation system owned by the United States Space Force and operated by Mission Delta 31. It is one of the global navigation satellite systems (GNSS) that provide geol ...
antennas on small devices like PDAs or
GPS receivers
A satellite navigation (satnav) device or GPS device is a device that uses satellites of the Global Positioning System (GPS) or similar global navigation satellite systems (GNSS).
A satnav device can determine the user's geographic coordinates ...
, or on mobile phones to connect external GSM-Antennas. They are also used by various brands of
in-ear monitors
An in-ear monitor (IEMs), in-ear, or colloquially earpiece is a listening device placed into the ear. More narrowly, the term in-ear monitor is defined as such a device used by musicians, audio engineers and audiophiles to listen to music or to ...
to connect the cable to the individual earpieces. This allows for the cables to be replaced or swapped. They were developed in the 1990s.
MMCX is also used in some video transmitters for
First-Person View (FPV) radio control piloting. This makes swapping antennas and repairing easier than the
U.FL connectors.
See also
*
MCX connector
MCX (micro coaxial connector) 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 CECC 22220. The connectors are ...
- Micro coaxial
*
TNC connector
The TNC connector (initialism of "Threaded Neill–Concelman") is a threaded version of the BNC connector.
Description
The interface specifications for the TNC and many other connectors are referenced in MIL-STD-348. The connector has a 50 Ω ...
*
SMA connector
SMA (''SubMiniature version A'') connectors are semi-precision coaxial RF connectors developed in the 1960s as a minimal connector interface for coaxial cable with a screw-type coupling mechanism. The connector has a 50 Ω impedance. SMA w ...
*
U.FL connector
References
External links
{{RF Connectors Navbox
RF connectors
de:Koaxialstecker#Steckverbinder der Typen MCX, MMCX und SSMCX