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Coaxial Connectors (RF)

Image Part Number Description / PDF Quantity Rfq
0732761501

0732761501

Woodhead - Molex

CONN N JACK STR 50 OHM CRIMP

135
0731711900

0731711900

Woodhead - Molex

CONN BNC JACK STR 75 OHM PCB

2859
0732162870

0732162870

Woodhead - Molex

CONN TNC PLUG STR 50 OHM SOLDER

282
0731710560

0731710560

Woodhead - Molex

CONN BNC RCPT R/A 75 OHM PCB

981
0734042330

0734042330

Woodhead - Molex

CONN SMB RCPT R/A 75 OHM PCB

2
0732760210

0732760210

Woodhead - Molex

CONN N PLUG R/A 50 OHM SOLDER

0
0732512771

0732512771

Woodhead - Molex

SMA JACK REVERSE POLARITY R/A PC

0
0853050232

0853050232

Woodhead - Molex

CONN SMP PLUG STR 50 OHM SMD

26431
0734035112

0734035112

Woodhead - Molex

SMB JACK FAKRA R/A PCB 50 OHM

773
0733660030

0733660030

Woodhead - Molex

CONN MCX JACK R/A 50 OHM PCB

2195
0734030395

0734030395

Woodhead - Molex

CONN SMB FAKRA JACK STR 50 OHM

566
0731712601

0731712601

Woodhead - Molex

CONN BNC RCPT STR 75OHM EDGE MNT

335
0731710700

0731710700

Woodhead - Molex

CONN BNC RCPT R/A 75 OHM PCB

0
0734150950

0734150950

Woodhead - Molex

CONN MMCX PLUG R/A 50 OHM SOLDER

0
0734151630

0734151630

Woodhead - Molex

CONN MCX RCPT STR 75 OHM SMD

32
0731000153

0731000153

Woodhead - Molex

CONN BNC RCPT STR 50 OHM PCB

87
0733000160

0733000160

Woodhead - Molex

CONN SMPM JACK R/A 50OHM SOLDER

852
0734130050

0734130050

Woodhead - Molex

CONN SSMCX JACK STR 50 OHM PCB

2849
0732760161

0732760161

Woodhead - Molex

CONN N JACK STR 50 OHM SOLDER

405
0733660062

0733660062

Woodhead - Molex

CONN MCX JACK STR 50 OHM PCB

627

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

TypeFunctional FeaturesTypical Applications
BNCBayonet coupling, 50/75 impedance, quick-connectTest instruments, video systems, 10BASE-T Ethernet
N-TypeThreaded coupling, 50 , weatherproofCellular base stations, microwave links, broadcast equipment
SMAThreaded, 0-18 GHz range, compact sizeWi-Fi antennas, GPS modules, RF modules
F-TypeCompression fitting, 75 impedanceCable TV, satellite TV, CATV systems
LCMiniature threaded, low PIM designHigh-density telecom equipment, 5G infrastructure

3. Structure and Components

A typical RF coaxial connector consists of four key elements:

  1. Center Conductor: Precision-machined pin/socket (beryllium copper or phosphor bronze) for signal transmission
  2. Dielectric Insulator: PTFE or ceramic material maintaining 50/75 impedance and spacing
  3. Outer Conductor: Brass or stainless steel shell providing 360 shielding (typical attenuation >80dB)
  4. Connection Mechanism: Threaded (N, SMA), bayonet (BNC), or compression (F-type) interface with anti-rotation features

4. Key Technical Specifications

ParameterDescriptionImportance
Frequency Range0.01-110 GHz (varies by type)Determines maximum usable bandwidth
Impedance50 (standard) or 75 Matches cable/system requirements
VSWR1.2:1 (typical) - 1.5:1 (high-performance)Measures signal reflection efficiency
Insertion Loss0.1-0.5 dB (varies with frequency)Impacts signal strength preservation
Withstanding Voltage500V-3000V ACSafety 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

ManufacturerKey ProductsSpecial Features
AmphenolSeries 5000 N-TypeIP68 rating, 0-11 GHz
TE ConnectivityDeutsch DMCMilitary-grade vibration resistance
Rosenberger4.3-10 Connector70% smaller than N-Type, 6 GHz
Huber+SuhnerRadiX HybridCombines RF and power in single interface
Southern California RFMini 50High-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.

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