Coaxial Connectors (RF)

Part Number	Description / PDF	Quantity
RFB-1106-2ST RF Industries	BNC MALE CRIMP; 50 OHMS	1527
132178 Connex (Amphenol RF)	CONN SMA PLUG STR 50 OHM SOLDER	2580
301-0TP Triplett Test Equipment and Tools	BNC CRIMP ON CONN MALE 10 PACK	90
RSA-3261 RF Industries	SMA FEMALE BH; 50 OHMS	184
1055687-1 TE Connectivity AMP Connectors	CONN OSMT RCPT STR 50 OHM SMD	2803
RF12-08A-T-21-50-G Adam Tech	RF MMCX CONNECTOR	57
CBBJR79TL Vitelec / Cinch Connectivity Solutions	CONN TRB JACK R/A PCB	1136
RFN-1006-2L2 RF Industries	N MALE CRIMP; 50 OHMS	677
RF55-24M-T-09-50-A-SH Adam Tech	FAKRA PLUG SMA TYPE: STRAIGHT, B	50
1-1337428-0 TE Connectivity AMP Connectors	CONN BNC PLUG STR 75 OHM SOLDER	2842
142-9701-211 Vitelec / Cinch Connectivity Solutions	CONN SMA JACK STR 50 OHM PCB	594
GRF1-J-P-02-E-ST-TH1 Samtec, Inc.	CONN MMCX JACK STR 50 OHM PCB	0
SF2921-61345 SV Microwave (Amphenol SV Microwave)	CONN SMA JACK STR 50 OHM SMD	128
61612042121504 Würth Elektronik Midcom	WR-SMB_PCB CONNECTOR_ THT JACK	114
305-21TP Triplett Test Equipment and Tools	BNC CRIMP CRIMP CONN MALE 10 PK	30
031-70259 Connex (Amphenol RF)	CONN MINI BNC PLG STR 75 OHM	0
RFB-1117-BT RF Industries	BNC FEMALE BH CRIMP; 50 OHMS	584
919-226J-71P Connex (Amphenol RF)	CONN MCX RCPT STR 75 OHM SMD	0
919-386P-51S Connex (Amphenol RF)	CONN MCX PLUG STR 50 OHM CRIMP	584
031-71063 Connex (Amphenol RF)	CONN TNC JACK STR 75 OHM PCB	77

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.