Coaxial Connectors (RF)

Image	Part Number	Description / PDF	Quantity	Rfq
	0731713920 Woodhead - Molex	BNC/TNC PLUG, PUSH ON, RECPT,50	0
	0732760690 Woodhead - Molex	CONN N PLUG R/A 50 OHM SOLDER	0
	0732575001 Woodhead - Molex	CONN N PLUG STR 50 OHM SOLDER	0
	0734136560 Woodhead - Molex	SSMCX JACK VERTICAL 75 OHMS PCB	0
	0731711190 Woodhead - Molex	CONN BNC PLUG STR 75 OHM SOLDER	0
	0731740390 Woodhead - Molex	CONN 1.0/2.3 JCK R/A 50OHM SOLDR	0
	0734151561 Woodhead - Molex	CONN RPMMCX PLG STR 50OHM EDGEMT	0
	0732510280 Woodhead - Molex	CONN SMA RCPT STR 50 OHM SOLDER	0
	0733910030 Woodhead - Molex	CONN SMA JACK STR 50 OHM SOLDER	0
	0734156181 Woodhead - Molex	SMP PLUG, STRAIGHT, PCB,T&R,KAPT	0
	0734042990 Woodhead - Molex	SPECIAL 75 OHM SMB PLUG STR RG	0
	0734036287 Woodhead - Molex	CONN FAKRA JACK STR 50OHM CRIMP	0
	0733580680 Woodhead - Molex	SSMCX SMT PCB 6 PORT 50 OHM	0
	0731055003 Woodhead - Molex	CONN BNC PLUG STR 50 OHM CRIMP	0
	0731000208 Woodhead - Molex	CONN SMB RCPT STR 50 OHM PCB	0
	0734155300 Woodhead - Molex	CONN SMP JACK STR 50 OHM SMD	0
	0733560230 Woodhead - Molex	CONN F PLUG R/A 75 OHM SOLDER	0
	0731713970 Woodhead - Molex	TNC JACK REV POL RA BLKHD IP68 P	0
	0734136080 Woodhead - Molex	SSMCX PLUG RG178	0
	0734136420 Woodhead - Molex	SSMCX PLUG STR 50 OHMS 1.13 CABL	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.