Coaxial Connectors (RF)

Part Number	Description / PDF	Quantity
119S202-40ML5 Rosenberger	CONN PSMP PLUG STR 50OHM EDGEMNT	0
19S104-40ML5 Rosenberger	CONN SMP PLUG STR 50OHM SMD	3997
D4S21J-40MA5-C Rosenberger	CONN HSD FAKRA PLUG R/A 100OHM	386
59S225-400L5 Rosenberger	CONN SMB PLUG R/A 50OHM PCB	1270
19K101-270L5 Rosenberger	CONN SMP JACK STR 50OHM SOLDER	70
19S14H-40ML5 Rosenberger	CONN SMP PLUG STR 50OHM SMD	1756
28S207-307N5 Rosenberger	QMA RIGHT ANGLE PLUG	0
56S105-015N5 Rosenberger	CONN TNC PLUG STR 50OHM SOLDER	27
29S211-303L5 Rosenberger	MCX RIGHT ANGLE PLUG	0
19S141-40ML5 Rosenberger	CONN SMP PLUG STR 50OHM SMD	1876
51K502-200N5 Rosenberger	CONN BNC JACK STR 50OHM SOLDER	0
51S207-306N5 Rosenberger	CONN BNC PLUG R/A 50OHM SOLDER	0
D4S12H-40MA5-A Rosenberger	CONN HSD FAKRA PLUG STR 100OHM	26
32K421-600S5 Rosenberger	SMA PANEL JACK	0
32K486-500L5 Rosenberger	SMA PANEL JACK	0
53K517-271N5 Rosenberger	CONN N TYPE JACK ST 50OHM SOLDER	16
03S121-272S3 Rosenberger	CONN RPC3.50 PLUG STR 50OHM	0
28K203-40ML5 Rosenberger	QMA RIGHT ANGLE JACK PCB	0
32S107-302L5 Rosenberger	CONN SMA PLUG STR 50OHM SOLDER	1305
53S205-315N5 Rosenberger	N TYPE RIGHT ANGLE PLUG	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.