Coaxial Connectors (RF)

Part Number	Description / PDF	Quantity
18S20G-40ML5 Rosenberger	CONN SMP MINI PLG STR 50OHM EDGE	278
23C11D-40ML5 Rosenberger	CONN MINICOAX 8PORT ST 50OHM SMD	115
32K103-5H0L5 Rosenberger	CONN SMA JACK STR 50OHM SOLDER	15
59K214-303L5 Rosenberger	CONN SMB JACK R/A 50OHM SOLDER	285
53S101-273B5 Rosenberger	CONN N TYPE PLG STR 50OHM SOLDER	44
29K203-400L5 Rosenberger	CONN MCX JACK R/A 50OHM PCB	0
32K421-700S5 Rosenberger	SMA PANEL JACK	0
18S243-40ML5 Rosenberger	CONN SMP MINI PLG STR 50OHM EDGE	131
D4S20L-40MA5-A Rosenberger	CONN HSD FAKRA PLUG R/A 100OHM	1167
19S641-271L5 Rosenberger	SMP BULKHEAD PLUG	0
28K101-400L5 Rosenberger	QMA STRAIGHT JACK PCB	0
144810 Rosenberger	SMA BULKHEAD JACK	0
59K106-103L5 Rosenberger	CONN SMB JACK STR 50OHM CRIMP	46
45S201-302L5 Rosenberger	1.0/2.3 RIGHT ANGLE PLUG	0
32K107-302L5 Rosenberger	CONN SMA JACK STR 50OHM SOLDER	18
51K107-801N5 Rosenberger	CONN BNC JACK STR 50OHM CRIMP	0
119S10B-40ML5 Rosenberger	CONN PSMP PLUG STR 50OHM SOLDER	246
59S602-200L5 Rosenberger	CONN SMB PLUG STR 50OHM SOLDER	0
32S122-272S5 Rosenberger	CONN SMA PLUG STR 50OHM SOLDER	249
56K607-106N5 Rosenberger	CONN TNC JACK STR 50OHM CRIMP	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.