Coaxial Connectors (RF)

Part Number	Description / PDF	Quantity
225532-4 TE Connectivity Aerospace Defense and Marine	CONN SMA PLUG STR 50 OHM CRIMP	100
228635-1 TE Connectivity Aerospace Defense and Marine	CONN SMA PLUG STR 50 OHM	308
2-331351-1 TE Connectivity Aerospace Defense and Marine	CONN BNC JACK STR 50 OHM CRIMP	0
331350 TE Connectivity Aerospace Defense and Marine	CONN BNC PLUG STR 50 OHM CRIMP	175
2-331350-9 TE Connectivity Aerospace Defense and Marine	CONN BNC PLUG STR 50 OHM PUSH	81
1-225532-1 TE Connectivity Aerospace Defense and Marine	CONN SMA PLUG STR 50 OHM CRIMP	0
DK-621-0440-4S TE Connectivity Aerospace Defense and Marine	CONN TRIAX JACK STR SOLDER	13
1052604-1 TE Connectivity Aerospace Defense and Marine	CONN SMA RCPT STR 50 OHM SOLDER	105
1046234-1 TE Connectivity Aerospace Defense and Marine	CONN N PLUG STR 50 OHM SOLDER	24
DK-621-0433-1P TE Connectivity Aerospace Defense and Marine	CONN TRIAX PLUG STR SOLDER	13
D-621-0012 TE Connectivity Aerospace Defense and Marine	CONN TRIAX JACK STR SOLDER	8
DK-621-0440-4P TE Connectivity Aerospace Defense and Marine	CONN TRIAX JACK STR SOLDER	10
225532-3 TE Connectivity Aerospace Defense and Marine	CONN SMA PLUG STR 50 OHM CRIMP	139
227531-1 TE Connectivity Aerospace Defense and Marine	CONN SMA PLUG STR 50 OHM	2
225550-1 TE Connectivity Aerospace Defense and Marine	CONN TNC PLUG STR 50 OHM CRIMP	1851
DK-621-0439-4S TE Connectivity Aerospace Defense and Marine	CONN TRIAX PLUG STR SOLDER	11
1059681-1 TE Connectivity Aerospace Defense and Marine	CONN MINI OSP JACK STR 50OHM PCB	0
228634-1 TE Connectivity Aerospace Defense and Marine	CONN SMA PLUG STR 50 OHM CRIMP	11
1053400-1 TE Connectivity Aerospace Defense and Marine	CONN SMA JACK R/A 50 OHM PCB	656
RTD-50-M-00 TE Connectivity Aerospace Defense and Marine	CONN TNC PLUG STR 50 OHM SOLDER	87

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.