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Coaxial Connectors (RF)

Image Part Number Description / PDF Quantity Rfq
132203-18

132203-18

Connex (Amphenol RF)

CONN SMA JACK R/A 50 OHM PCB

738
901-9867-RFX

901-9867-RFX

Connex (Amphenol RF)

CONN SMA PLUG STR 50 OHM SOLDER

1477
132108

132108

Connex (Amphenol RF)

CONN SMA JACK STR 50 OHM SOLDER

618
082-532

082-532

Connex (Amphenol RF)

CONN C PLUG STR 50 OHM SOLDER

23
112178

112178

Connex (Amphenol RF)

CONN BNC PLUG R/A 50 OHM SOLDER

167
222164

222164

Connex (Amphenol RF)

CONN F PLUG R/A 75 OHM SOLDER

177
132284

132284

Connex (Amphenol RF)

CONN SMA JACK STR 50 OHM SOLDER

299
132266

132266

Connex (Amphenol RF)

CONN SMA PLUG STR 50 OHM SOLDER

659
034-5022

034-5022

Connex (Amphenol RF)

CONN HDBNC RCPT STR 50 OHM PCB

476
102-913-06

102-913-06

Connex (Amphenol RF)

CONN 1.0/2.3 JCK STR 50OHM SOLDR

0
034-5024

034-5024

Connex (Amphenol RF)

CONN HDBNC JACK R/A 50 OHM PCB

0
222118

222118

Connex (Amphenol RF)

CONN F PLUG STR 75OHM

145
82-5590-RFX

82-5590-RFX

Connex (Amphenol RF)

CONN N TWIN RCPT STR SOLDER

187
31-321-RFX

31-321-RFX

Connex (Amphenol RF)

CONN BNC PLUG STR 50 OHM CRIMP

96
901-10024-RFX

901-10024-RFX

Connex (Amphenol RF)

CONN SMA PLUG STR 50 OHM SOLDER

80
031-6878

031-6878

Connex (Amphenol RF)

RF CONNECTOR TNC RIGHT ANGLE CRI

258
68175-5RFX

68175-5RFX

Connex (Amphenol RF)

CONN BNC PLUG STR 50 OHM CRIMP

0
172264

172264

Connex (Amphenol RF)

CONN N JACK STR 50 OHM SOLDER

66
031-70536-12G

031-70536-12G

Connex (Amphenol RF)

CONN BNC STRAIGHT JACK 75 OHM

548
122387

122387

Connex (Amphenol RF)

CONN TNC PLUG STR 50 OHM CRIMP

52

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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