MMCX Receptacle Guide: Types, Structure, and Uses Explained
What Are MMCX Receptacles?
Micro-Miniature Coaxial (MMCX) receptacles are ultra-compact RF coaxial connectors designed for high-density mounting on printed circuit boards. Compared to MCX connectors, MMCX offers a smaller form factor, making it suitable for space-constrained electronic designs.
Tyclon provides MMCX PCB receptacles as part of a broader connector lineup including plugs and adapters. These connectors are designed with a 50 Ohm characteristic impedance and are typically rated for operation from DC up to 6 GHz, depending on the product configuration.
MMCX connectors use a snap-on (push-on) coupling mechanism, enabling quick mating and unmating while maintaining stable electrical performance in compact, high-frequency applications.
Mating of MMCX Connectors
The mating mechanism of the MMCX series features a "snap-on" or "push-on" design. Unlike threaded connectors that require manual tightening, MMCX connectors allow easy coupling by simply pushing them together, making them highly suitable for limited-space applications. To ensure longevity and preserve connector and cable integrity, it is recommended to push straight in to connect and pull straight out to disconnect without twisting.
MMCX Receptacles by Type
Tyclon provides printed circuit board (PCB) receptacles in specialized configurations to meet various design requirements. These receptacles typically feature a brass body with gold plating, a beryllium copper center contact with gold plating, and support a 50 Ohm impedance and frequencies up to 6 GHz:
Straight PCB Receptacles:
These models feature a vertical mounting structure that is installed through holes in the printed circuit board, providing a straight interface. This design offers superior mechanical strength and stability, making it suitable for applications that require the connector to withstand repeated mating cycles.
Right-Angle PCB Receptacles:
Designed for low-profile applications, these receptacles allow the mating plug to connect parallel to the printed circuit board. This reduces the assembly's total vertical height, which is essential for slim device enclosures.
Straight PCB Receptacle Surface-Mount:
These receptacles are designed for modern automated assembly processes and are mounted directly to the surface of the printed circuit board without drilling holes. This configuration is optimized for high-density layouts and minimizes the connector's footprint.
Trivia: Plugs, Jacks, and Receptacles
An MMCX PCB receptacle is designed for mounting directly to a printed circuit board rather than for attachment to a coaxial cable. Because it is designed to provide a fixed interface on the electronic assembly, it is most commonly used as an internal connection point within an enclosure.
In contrast, MMCX plugs (male) and MMCX jacks (female) are intended for direct cable termination. These connectors are designed for specific coaxial cable types and include mechanical retention features suited for the strain and flex demands of external cable assemblies.
- Learn more about the MMCX Plug (Male)
- Learn more about the MMCX Jack (Female)
Examples of MMCX Receptacle Usage
Due to their ultra-compact size and reliable performance up to 6 GHz, MMCX connectors are used in various modern technologies:
・Consumer Electronics:
Used in space-constrained devices such as certain portable electronics, wearable devices, and internal RF modules in consumer devices to help maintain signal integrity.
・Telecommunications:
Used in wireless devices such as antennas and GPS modules, supporting high-frequency performance suitable for applications such as Wi-Fi and Bluetooth systems.
・Transportation:
Used in automotive GPS and some aerospace and avionics systems, offering lightweight, space-saving solutions for navigation and communication systems.
・Medical Equipment:
Serving as reliable miniature connections for portable medical devices, such as hearing aids and diagnostic equipment.
MMCX Receptacle FAQs
QWhat is the characteristic impedance of Tyclon MMCX receptacles?
QWhat is the characteristic impedance of Tyclon MMCX receptacles?
All standard Tyclon MMCX receptacles are designed with a 50 Ohm characteristic impedance to match common radio frequency transmission lines.
QWhat is the maximum operating frequency for these connectors?
QWhat is the maximum operating frequency for these connectors?
The MMCX series is rated for high performance up to 6 GHz, covering common wireless communication and data transmission bands.
QAre MMCX receptacles compatible with MCX plugs?
QAre MMCX receptacles compatible with MCX plugs?
No, they are not compatible. MMCX and MCX connectors differ in physical dimensions and mating interface geometry, and must only be used with connectors within the same series.
QWhat are the primary materials used in Tyclon MMCX receptacles?
QWhat are the primary materials used in Tyclon MMCX receptacles?
They are typically constructed with a brass or beryllium copper body featuring gold plating to ensure good conductivity and resistance to oxidation.
QWhat types of coaxial cables are compatible with MMCX connectors?
QWhat types of coaxial cables are compatible with MMCX connectors?
They are compatible with JIS standard 1.5D-QEV and MIL standard RG-316/U cables, as well as ultra-fine coaxial cables used for compact connector wiring, such as 1×32 AWG (7/0.08) with approximately 1.32 mm outer diameter.
QWhat is the voltage rating for the MMCX series?
QWhat is the voltage rating for the MMCX series?
The voltage rating for Tyclon MMCX connectors is AC 170 V, with a dielectric withstand voltage of DC 500 V for one minute.
QWhat is the operating temperature range for MMCX receptacles?
QWhat is the operating temperature range for MMCX receptacles?
It varies depending on the product configuration. The surface-mount (SMT) type operates between -55°C and +155°C, while the straight type and right-angle type are rated for use between -40°C and +85°C.
QWhat is the Voltage Standing Wave Ratio (VSWR) of the PCB receptacles?
QWhat is the Voltage Standing Wave Ratio (VSWR) of the PCB receptacles?
Within the 0 to 6 GHz frequency range, the straight type has a VSWR of 1.2 or less, while both the right-angle type and the surface-mount type have a VSWR of 1.3 or less.
QWhat are the characteristics and advantages of the connector's coupling method?
QWhat are the characteristics and advantages of the connector's coupling method?
They utilize a push-on (snap-on coupling) mechanism that allows for quick and easy mating and unmating without threading. Because they can be connected simply by pushing them together, they are suitable for mounting in tight, space-constrained areas where screw tightening is difficult.
QHow do MMCX connectors compare in size to SMB and MCX connectors?
QHow do MMCX connectors compare in size to SMB and MCX connectors?
SMB connectors are considered medium-sized; MCX connectors are smaller, at approximately 70% of the SMB form factor. MMCX connectors are ultra-compact, smaller still than the MCX series, making them well suited for equipment where minimizing size and weight is critical.
QIn which types of devices are MMCX receptacles commonly found?
QIn which types of devices are MMCX receptacles commonly found?
Due to their compact size, they are used in various wireless and RF-related applications, such as navigation/GPS modules, antennas, and compact communication devices, as well as portable medical diagnostic tools.
QHow can I order MMCX receptacles, and what support do you offer?
QHow can I order MMCX receptacles, and what support do you offer?
Ordering is simple—you can purchase our MMCX receptacles directly on our website or contact our sales team for assistance. We also provide comprehensive technical support, including datasheets, CAD models, and application notes, to help you select the ideal connector for your project.
Purchase Guide
Tyclon coaxial connectors and processed coaxial cable products can be purchased directly online using a variety of credit cards.
