Coaxial Connectors (RF)

Image	Part Number	Description / PDF	Quantity	Rfq
	0732540430 Woodhead - Molex	SMP JACK PCB TH 50 OHM	0
	0731711050 Woodhead - Molex	BNC PLUG PUSH ON	0
	0734152913 Woodhead - Molex	CONN FAKRA PLUG STR 50 OHM CRIMP	0
	0732250041 Woodhead - Molex	CONN 2.2-5 PLUG ST	0
	0732540210 Woodhead - Molex	CONN QMA RCPT STR 50 OHM SOLDER	0
	0731010340 Woodhead - Molex	CONN BNC JACK STR 75 OHM PCB	0
	0732540091 Woodhead - Molex	CONN QMA PLUG STR 50 OHM SOLDER	0
	0732540111 Woodhead - Molex	CONN QMA PLUG R/A 50 OHM SOLDER	0
	0731711980 Woodhead - Molex	CONN BNC JACK R/A 75 OHM PCB	0
	0734152912 Woodhead - Molex	CONN FAKRA PLUG STR 50 OHM CRIMP	0
	0734120260 Woodhead - Molex	F TYPE S/T RG59 CABLE 75 OHM	0
	0733000630 Woodhead - Molex	CONN SMPM PLUG	0
	0734136490 Woodhead - Molex	CONN SSMCX PLUG	0
	0732253090 Woodhead - Molex	CONN 2.2-5 PLUG ST IP68 FOR 3/8'	0
	0731712630 Woodhead - Molex	CONN MINI BNC JCK STR 75 OHM	0
	0733300280 Woodhead - Molex	CONN F PLUG STR PCB	0
	0732512121 Woodhead - Molex	SMA JACK,EDGE MNT,50 OHM,.062 BO	0
	0732980000 Woodhead - Molex	BMA PLUG, BKHD, RG402/SR141, 50	0
	0734140290 Woodhead - Molex	MMCX JACK VERTICAL PBC	0
	0625002362 Woodhead - Molex	M8 3P RT ANGLE SINGLE ENDED X 4M	0

Coaxial Connectors (RF)

1. Overview

RF coaxial connectors are electro-mechanical devices designed to transmit radio frequency (RF) signals between components or systems. They maintain signal integrity in coaxial cables by preserving impedance matching and shielding performance. These connectors are critical in telecommunications, aerospace, defense, and test equipment, enabling reliable high-frequency signal transmission up to 110 GHz in modern applications.

2. Main Types and Functional Classification

Type	Functional Features	Typical Applications
BNC	Bayonet coupling, 50/75 impedance, quick-connect	Test instruments, video systems, 10BASE-T Ethernet
N-Type	Threaded coupling, 50 , weatherproof	Cellular base stations, microwave links, broadcast equipment
SMA	Threaded, 0-18 GHz range, compact size	Wi-Fi antennas, GPS modules, RF modules
F-Type	Compression fitting, 75 impedance	Cable TV, satellite TV, CATV systems
LC	Miniature threaded, low PIM design	High-density telecom equipment, 5G infrastructure

3. Structure and Components

A typical RF coaxial connector consists of four key elements:

Center Conductor: Precision-machined pin/socket (beryllium copper or phosphor bronze) for signal transmission
Dielectric Insulator: PTFE or ceramic material maintaining 50/75 impedance and spacing
Outer Conductor: Brass or stainless steel shell providing 360 shielding (typical attenuation >80dB)
Connection Mechanism: Threaded (N, SMA), bayonet (BNC), or compression (F-type) interface with anti-rotation features

4. Key Technical Specifications

Parameter	Description	Importance
Frequency Range	0.01-110 GHz (varies by type)	Determines maximum usable bandwidth
Impedance	50 (standard) or 75	Matches cable/system requirements
VSWR	1.2:1 (typical) - 1.5:1 (high-performance)	Measures signal reflection efficiency
Insertion Loss	0.1-0.5 dB (varies with frequency)	Impacts signal strength preservation
Withstanding Voltage	500V-3000V AC	Safety and insulation capability

5. Application Fields

Telecommunications: 5G base stations (N-Type/LC), fiber modems (SC/FC)
Military/Aerospace: Radar systems (high-reliability N-Type), avionics (MIL-STD-348 compliant)
Test & Measurement: Spectrum analyzers (Precision SMA), oscilloscopes (BNC)
Consumer Electronics: Cable TV (F-Type), Wi-Fi routers (RP-SMA)
Industrial IoT: Wireless sensors (TNC), RFID readers (MMCX)

6. Leading Manufacturers and Products

Manufacturer	Key Products	Special Features
Amphenol	Series 5000 N-Type	IP68 rating, 0-11 GHz
TE Connectivity	Deutsch DMC	Military-grade vibration resistance
Rosenberger	4.3-10 Connector	70% smaller than N-Type, 6 GHz
Huber+Suhner	RadiX Hybrid	Combines RF and power in single interface
Southern California RF	Mini 50	High-density SMA alternative

7. Selection Recommendations

Key selection criteria include:

Frequency Requirements: BNC ( 4 GHz) vs SMA ( 18 GHz) vs 2.92mm ( 40 GHz)
Environmental Factors: Outdoor applications require IP67+ rated N-Type
Mechanical Durability: >500 mating cycles for test environments
Impedance Matching: 75 for video/cable TV systems
Space Constraints: Miniaturized options (MMCX, U.FL) for mobile devices

Case Study: In 5G massive MIMO systems, engineers prefer 4.3-10 connectors over traditional N-Type due to 30% size reduction and improved PIM performance (<-160dBc).

8. Industry Trends

Emerging development directions include:

Extreme Frequency: 110 GHz+ connectors for 6G and automotive radar
Miniaturization: 1.0mm connectors for wearable IoT devices
High-Density Integration: Multi-port arrays with integrated filters
Material Innovation: Graphene-enhanced contacts for reduced insertion loss
Smart Connectivity: Embedded sensors for real-time VSWR monitoring

Market forecasts indicate a CAGR of 7.2% (2023-2028), driven by 5G expansion and satellite internet demand.