Coaxial Connectors (RF)

Part Number	Description / PDF	Quantity
TC-240-FMEM-X Times Microwave Systems	FME MALE (PLUG) CRIMP CONNECTOR,	0
MMCX-LP-178B/U(40) Hirose	CONN MMCX PLUG R/A 50 OHM SOLDER	0
CONREVSMA012 Linx Technologies	CONN RPSMA PLUG R/A 50OHM SOLDER	186
60611002111502 Würth Elektronik Midcom	MCX THT PCB JACK, RIGHT ANGLE, 5	192
142-0781-882 Vitelec / Cinch Connectivity Solutions	HIGH FREQ END LAUNCH SMA BKHD JA	400
903-577P-51S1 Connex (Amphenol RF)	CONN SMB PLUG STR 50 OHM SOLDER	0
1-1478021-0 TE Connectivity AMP Connectors	CONN TNC JACK STR 50 OHM SOLDER	0
125-2701-221 Vitelec / Cinch Connectivity Solutions	SMPM MALE, STRAIGHT, SURFACE MOU	248
1061027-1 TE Connectivity AMP Connectors	CONN MCX RCPT R/A 50 OHM PCB	0
31-71008-1000 Connex (Amphenol RF)	CONN BNC PLUG STR 75 OHM CRIMP	4
60312202114514 Würth Elektronik Midcom	SMA PCB END LAUNCH JACK FLAT TAB	277
903-613P-71AD Connex (Amphenol RF)	CONN SMB PLUG 45 ANGLE 75 OHM	0
SF1521-60115-1S SV Microwave (Amphenol SV Microwave)	CONN 2.92MM JACK 50 OHM SMD	95
SF3321-60004 SV Microwave (Amphenol SV Microwave)	CONN 1.85MM JCK STR 50OHM SOLDER	23
31-71008 Connex (Amphenol RF)	CONN BNC PLUG STR 75 OHM CRIMP	119
FA1-NASJ-C01-0 Connex (Amphenol RF)	CONN FAKRA JACK STR 50 OHM CRIMP	259
1053354-1 TE Connectivity AMP Connectors	CONN SMA JACK STR 50 OHM PCB	1445
112528 Connex (Amphenol RF)	CONN BNC PLUG R/A 50 OHM SOLDER	0
CONSMA002-L Linx Technologies	CONN SMA RCPT R/A 50 OHM PCB	2550
1310851-1 TE Connectivity AMP Connectors	CONN SMB RCPT STR 50 OHM PCB	684

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.