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Coaxial Connectors (RF)

Image Part Number Description / PDF Quantity Rfq
31-2368

31-2368

Connex (Amphenol RF)

CONN TNC PLUG STR 50 OHM CRIMP

23
112594

112594

Connex (Amphenol RF)

CONN BNC PLUG R/A 50 OHM SOLDER

38
031-70573-12G

031-70573-12G

Connex (Amphenol RF)

RF CONNECTOR BNC STRAIGHT CRIMP

100
082-6643

082-6643

Connex (Amphenol RF)

CONN N JACK STR 50 OHM SOLDER

90
901-9511-1SF

901-9511-1SF

Connex (Amphenol RF)

CONN SMA PLUG STR 50 OHM SOLDER

147
031-70000

031-70000

Connex (Amphenol RF)

CONN BNC PLUG STR 75 OHM CRIMP

191
112424RP

112424RP

Connex (Amphenol RF)

CONN RPBNC RCPT STR 50OHM SOLDER

57
172180

172180

Connex (Amphenol RF)

CONN N PLUG R/A 50 OHM SOLDER

66
252173

252173

Connex (Amphenol RF)

CONN MCX RCPT STR 50 OHM SOLDER

89
031-316-RFX

031-316-RFX

Connex (Amphenol RF)

CONN BNC PLUG R/A 50 OHM CRIMP

53
31-223

31-223

Connex (Amphenol RF)

CONN TWINAX RCPT STR 50 OHM

126
903-375J-53P

903-375J-53P

Connex (Amphenol RF)

CONN SMB RCPT STR 50 OHM PCB

0
122430

122430

Connex (Amphenol RF)

CONN TNC PLUG R/A 50 OHM SOLDER

267
132236

132236

Connex (Amphenol RF)

CONN SMA JACK STR 50 OHM SOLDER

84
112616

112616

Connex (Amphenol RF)

CONN BNC JACK STR 50 OHM SOLDER

98
332101

332101

Connex (Amphenol RF)

CONN 4.1/9.5 JCK STR 50OHM SOLDR

25
142186-75

142186-75

Connex (Amphenol RF)

CONN MINI SMB PLUG STR 75 OHM

697
122373

122373

Connex (Amphenol RF)

CONN TNC JACK STR 50 OHM CRIMP

297
000-27075

000-27075

Connex (Amphenol RF)

CONN MHV JACK STR SOLDER

68
031-6110

031-6110

Connex (Amphenol RF)

CONN RPTNC JACK STR 50 OHM 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

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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