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Coaxial Connectors (RF)

Image Part Number Description / PDF Quantity Rfq
132443

132443

Connex (Amphenol RF)

CONN SMA PLUG STR 50OHM SOLDER

39
919-421P-71S12G

919-421P-71S12G

Connex (Amphenol RF)

MCX STRAIGHT CRIMP PLUG FOR BELD

40
000-27000

000-27000

Connex (Amphenol RF)

CONN MHV RCPT STR SOLDER

239
222158

222158

Connex (Amphenol RF)

CONN F JACK STR 75 OHM SOLDER

100
531-40078

531-40078

Connex (Amphenol RF)

CONN F RCPT STR 75 OHM CRIMP

89
252105-75

252105-75

Connex (Amphenol RF)

CONN MCX RCPT STR 75 OHM PCB

0
122333

122333

Connex (Amphenol RF)

CONN TNC RCPT STR 75 OHM SOLDER

0
031-5678

031-5678

Connex (Amphenol RF)

CONN RPTNC JACK STR 50 OHM CRIMP

23
122160RP

122160RP

Connex (Amphenol RF)

CONN RP-TNC JACK STR 50OHM CRIMP

219
SMP-FR-C07

SMP-FR-C07

Connex (Amphenol RF)

CONN SMP PLUG R/A 50 OHM SOLDER

1
122420

122420

Connex (Amphenol RF)

CONN TNC PLUG R/A 50 OHM SOLDER

0
182341

182341

Connex (Amphenol RF)

CONN UHF JACK STR 50 OHM SOLDER

0
031-70234

031-70234

Connex (Amphenol RF)

CONN BNC PLUG STR 75 OHM CRIMP

0
182130-10

182130-10

Connex (Amphenol RF)

UHF STRAIGHT CRMIP PLUG, LMR400,

55
FM4-NZRP-PCB-1

FM4-NZRP-PCB-1

Connex (Amphenol RF)

AUTOMATE MINI FAKRA QUAD PORT PC

0
2FA1-NDSP-C04-1

2FA1-NDSP-C04-1

Connex (Amphenol RF)

CONN FAKRA PLUG STR 50 OHM CRIMP

1996
031-71045

031-71045

Connex (Amphenol RF)

CONN BNC JACK STR 75 OHM PCB

33
SMP-MSCM-PCS-10

SMP-MSCM-PCS-10

Connex (Amphenol RF)

SMP STRAIGHT PCB JACK THROUGH HO

274
930-163J-51P

930-163J-51P

Connex (Amphenol RF)

CONN QMA RCPT STR 50 OHM PCB

496
082-209-1006

082-209-1006

Connex (Amphenol RF)

CONN N JACK STR 50 OHM SOLDER

73

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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