Coaxial Connectors (RF)

Part Number	Description / PDF	Quantity
SF2911-60973-1S SV Microwave (Amphenol SV Microwave)	SMA MALE SOLDERLESS PCB COMPRESS	24
SF1512-60028 SV Microwave (Amphenol SV Microwave)	2.92MM MALE CONNECTOR, R/A FOR .	25
2921-61493-TD SV Microwave (Amphenol SV Microwave)	CONN SMA JACK R/A 50OHM EDGE MNT	68
SF8901-6003 SV Microwave (Amphenol SV Microwave)	CONN BMZ PLUG STR 50OHM SOLDER	25
M39012/30B0015 SV Microwave (Amphenol SV Microwave)	CONN TNC PLUG R/A 50OHM CRIMP	0
3211-60180-TD SV Microwave (Amphenol SV Microwave)	CONN SMPM PLUG R/A 50OHM EDGEMNT	0
M39012/83-3007 SV Microwave (Amphenol SV Microwave)	CONN SMA JACK STR 50OHM	0
M39012/79B3101 SV Microwave (Amphenol SV Microwave)	CONN SMA PLUG STR 50OHM SOLDER	27
SF2902-6005 SV Microwave (Amphenol SV Microwave)	CONN SMA PLUG STR 50OHM SOLDER	547
3221-40006 SV Microwave (Amphenol SV Microwave)	CONN SMPM JACK STR 50OHM SOLDER	16
SF3211-60218-2S SV Microwave (Amphenol SV Microwave)	CONN SMPM PLUG STR 50 OHM SMD	0
SF1621-60048-1S SV Microwave (Amphenol SV Microwave)	CONN 2.4MM JACK 50 OHM SMD	0
M39012/56-3126 SV Microwave (Amphenol SV Microwave)	CONN SMA PLUG R/A 50OHM CRIMP	78
M39012/56-3028 SV Microwave (Amphenol SV Microwave)	CONN SMA PLUG R/A 50OHM CRIMP	83
3287-4100 SV Microwave (Amphenol SV Microwave)	CONN SMPM PLUG STR 50OHM PCB	470
M39012/26-0018 SV Microwave (Amphenol SV Microwave)	CONN TNC PLUG STR 50OHM	48
M39012/79B3001 SV Microwave (Amphenol SV Microwave)	CONN SMA PLUG STR 50OHM SOLDER	0
1214-4001 SV Microwave (Amphenol SV Microwave)	CONN SMP JACK R/A 50OHM SMD	278
3321-60054 SV Microwave (Amphenol SV Microwave)	1.85MM FEMALE FIELD REPLACEABLE	0
3211-40118 SV Microwave (Amphenol SV Microwave)	SMPM MALE NON-MAGNETIC PCB SURFA	50

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.