Coaxial Connectors (RF)

Part Number	Description / PDF	Quantity
3211-40094 SV Microwave (Amphenol SV Microwave)	SMPM MALE PCB THRU-HOLE CONNECTO	50
RSB-4055-1B RF Industries	SMB FEMALE R/A CRIMP; 50 OHMS	70
901-9511-1 Connex (Amphenol RF)	CONN SMA PLUG STR 50 OHM SOLDER	104
71K101-400A5 Rosenberger	CONN BNC JACK STR 75OHM PCB	0
53S107-106N5 Rosenberger	CONN N TYPE PLUG STR 50OHM CRIMP	314
PSMP-MSSB-PCT35 Connex (Amphenol RF)	CONN PSMP JACK STR 50 OHM PCB	100
2FA1-NASP-C01-1 Connex (Amphenol RF)	CONN FAKRA PLUG STR 50 OHM CRIMP	1980
031-70331 Connex (Amphenol RF)	CONN MINI BNC JCK STR 75 OHM	38
SF3211-60193-1S SV Microwave (Amphenol SV Microwave)	CONN SMPM PLUG STR 50 OHM SMD	0
122334 Connex (Amphenol RF)	CONN TNC RCPT STR 50 OHM SOLDER	0
51494-1 TE Connectivity AMP Connectors	CONN SHV JACK STR SOLDER	69
EZ-240-TM-RP-PL-X Times Microwave Systems	TNC-MALE (PLUG) CRIMP, REVERSE P	0
MS-151NB-1 Hirose	CONN COAX SWITCH RCPT R/A 50OHM	930
HRM-200-4S-C(40) Hirose	CONN SMA PLUG R/A 50OHM SOLDER	0
56K404-200N5 Rosenberger	CONN TNC JACK STR 50OHM SOLDER	0
PL75-47BR Vitelec / Cinch Connectivity Solutions	CONN TRB PLUG STR SOLDER	219
SF3211-60193-2S SV Microwave (Amphenol SV Microwave)	CONN SMPM PLUG STR 50 OHM SMD	0
SF3211-60218-1S SV Microwave (Amphenol SV Microwave)	CONN SMPM PLUG STR 50 OHM SMD	53
59S101-400L5 Rosenberger	CONN SMB PLUG STR 50OHM PCB	761
031-6359 Connex (Amphenol RF)	TNC STRAIGHT JACK, SOLDER CUP, B	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.