MMCX connector is one kind of coaxial RF connectors which have smaller size than MCX connector and were designed in 1990’s with a lock-snap mechanism. The snap-on design permits user to connect and disconnect MMCX connector rapidly in limited spaces.
MMCX connector has 50ohm impedance and usually were specified up to 6GHz. The lock-snap mechanism design allows MMCX connectors to be rotated 360 degrees.
MMCX connector is used in many different applications like GPS tracking, GSM cellular, WiFi or WLAN equipments. MMCX female PCB type and MMCX jack edge mount type connectors are the most commonly seen on Wi-Fi PCMCIA cards as MMCX antenna connector.
Mechanical Feature:
MMCX male
- Snap-on coupling
- C-clip on MMCX male for mating captive
- Outer diameter is 2.4mm max. for mating
- Male center contact
MMCX female
- Snap-on coupling
- Inner diameter is 2.41 min. for mating
- Female center contact
- Part of female contact doesn’t be surrounded by insulator.
How to judge MMCX connectors’ feature from outline:
MMCX connector Male (Plug)
MMCX Connector Male (Plug)
MMCX male’s diameter is about 2.4mm, and there is a C-clip for lock-snap with MMCX female connector.
MMCX connector Female (Jack)
MMCX connector Female (Jack)
The inner diameter of MMCX female connector is about 2.41mm. There is no insulator surrounding MMCX female center contact. (P.S. MCX female’s insulator surround center contact)
MMCX connector right angle type:
MMCX connector right angle type
The cable entry way or PCB terminated way is at 90 degrees against coupling way.
MMCX connector straight type:
MMCX connector straight type
The cable entry way or PCB terminated way is at 180 degrees to coupling way.
MMCX connector female/ jack bulkhead type:
MMCX connector is designed with lock-snap mechanism, so the thread on MMCX connector definitely is for bulkhead mounting purpose.
1) Rear mount type bulkhead
MMCX connector Rear mount type bulkhead
MMCX connector rear mount bulkhead type will go through the panel mounting hole toward the external of device from the internal, and mount it with washer and nut from outside.
2) Front mount type bulkhead
MMCX connector Front mount type bulkhead
MMCX connector bulkhead type will go through the panel hole toward the internal of device from the external, and mount it with washer and nut from inside.
MMCX connector PCB connector:
MMCX connector PCB connector
PCB type MMCX connector normally has 2.9mm or 3.9mm leg lengths. Four legs and one conductor will go through PCB vertically, and be soldered in rear side of PC board.
MMCX connector edge mount (end launch)
MMCX female/ jack edge mount (end launch)
MMCX edge mount type connector will be mounted with the PCB from board’s edge side
MMCX connector SMT type
MMCX connector SMT type
SMT type MMCX connector has very short legs from 0.5mm~1.6mm. Legs and conductor will be mounted on PCB’s surface.
MMCX connector cable connector:
MMCX connector cable connector
MMCX connector will be terminated with RF coaxial cable by crimping or soldering to be MMCX cable or MMCX pigtail for RF signal transmission. The most popular is MMCX RG174 cable, MMCX 1.13mm cable and MMCX RG178 cable assembly.
