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Coaxial Connectors (RF)

Image Part Number Description / PDF Quantity Rfq
132144

132144

Connex (Amphenol RF)

CONN SMA PLUG STR 50 OHM SOLDER

170
122414

122414

Connex (Amphenol RF)

CONN TNC PLUG R/A 50 OHM SOLDER

85
031-2300-RFX

031-2300-RFX

Connex (Amphenol RF)

CONN TNC RCPT STR 50 OHM SOLDER

39
919-236J-71A

919-236J-71A

Connex (Amphenol RF)

MCX RIGHT ANGLE PCB JACK, THROUG

0
901-143-4

901-143-4

Connex (Amphenol RF)

CONN SMA JACK R/A 50 OHM PCB

14
82-6673

82-6673

Connex (Amphenol RF)

RF CONNECTOR, TYPE N PLUG, .141"

100
122426

122426

Connex (Amphenol RF)

CONN TNC PLUG STR 75 OHM CRIMP

97
031-6213

031-6213

Connex (Amphenol RF)

CONN RPTNC JACK STR 50 OHM CRIMP

0
034-1121-12G

034-1121-12G

Connex (Amphenol RF)

CONN HD-BNC JACK 75 OHM

486
031-70576-12G

031-70576-12G

Connex (Amphenol RF)

RF CONNECTOR BNC STRAIGHT PCB JA

0
920-255P-51P

920-255P-51P

Connex (Amphenol RF)

CONN AFI PLUG STR 50 OHM SMD

500
262128

262128

Connex (Amphenol RF)

CONN MMCX PLUG R/A 50OHM SOLDER

639
919-107J-51SX

919-107J-51SX

Connex (Amphenol RF)

CONN MCX JACK STR 50 OHM SOLDER

59
083-1SP

083-1SP

Connex (Amphenol RF)

CONN UHF PLUG STR 50 OHM SOLDER

216
122471

122471

Connex (Amphenol RF)

TNC STRAIGHT CRIMP PLUG FOR LMR-

21
031-4541

031-4541

Connex (Amphenol RF)

CONN BNC PLUG STR 50 OHM CRIMP

90
122391

122391

Connex (Amphenol RF)

CONN TNC PLUG STR 75OHM CRIMP

0
172177

172177

Connex (Amphenol RF)

CONN N PLUG R/A 50 OHM SOLDER

578
031-70340

031-70340

Connex (Amphenol RF)

CONN MINI BNC PLG R/A 75 OHM

13
112522

112522

Connex (Amphenol RF)

CONN BNC JACK STR 50 OHM CRIMP

162

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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