Coaxial Connectors (RF)

Coaxial Connectors (RF) - Adapters

Part Number	Description / PDF	Quantity
134-1000-008 Vitelec / Cinch Connectivity Solutions	ADAPTER 2.4MM JACK - 2.92MM JACK	39
RFD-1672-2 RF Industries	7/16 DIN FEMALE-N MALE	60
1059172-1 TE Connectivity AMP Connectors	CONN ADAPT SMA JACK TO TNC JACK	0
18K118-K04L5 Rosenberger	ADAPT SMPM JACK - SMPM JACK	67
221988-1 TE Connectivity AMP Connectors	CONN ADAPT JACK-JACK BNC 50 OHM	228
AD1WHD Vitelec / Cinch Connectivity Solutions	CONN ADAPT BNC JACK TO WECO PLUG	7
03K719-S22S3 Rosenberger	ADAPT 3.50MM JACK - SMP PLUG	15
60S164-S00N1 Rosenberger	CONN ADAPT 7/16 PLUG-4.3/10 PLUG	0
112655 Connex (Amphenol RF)	CONN ADAPT PLUG-PLUG BNC 50 OHM	74
1056334-1 TE Connectivity AMP Connectors	CONN ADAPT JACK-JACK OSM 50 OHM	0
AD-716J4310P-1 Connex (Amphenol RF)	CONN ADAPT 7/16 JACK-4.3/10 PLUG	4
122342 Connex (Amphenol RF)	CONN ADAPT JACK-JACK TNC 50 OHM	28
2904790 Phoenix Contact	CONN ADAPT JACK-PLUG RP-SMA	55
242174 Connex (Amphenol RF)	CONN ADAPT SMA PLUG TO SMC JACK	161
SF1129-6154 SV Microwave (Amphenol SV Microwave)	SMA MALE TO SMP FEMALE ADAPTER	70
MS151P-HRMJ-1 Hirose	CONN ADAPT COAX PLUG TO SMA JACK	0
RFU-537 RF Industries	UHF FEMALE-UHF FEMALE BARREL BH	89
242128 Connex (Amphenol RF)	CONN ADAPT SMA PLUG TO MCX PLUG	138
SF2997-6003 SV Microwave (Amphenol SV Microwave)	CONN ADAPT PLUG-JACK SMA 50 OHM	460
2805083 Phoenix Contact	CONN ADAPT JACK-JACK BNC 75 OHM	19

Coaxial Connectors (RF) - Adapters

1. Overview

RF coaxial connector adapters are passive devices enabling seamless interface between different coaxial connector types or configurations. They maintain signal integrity in radio frequency (RF) systems by ensuring impedance matching and minimizing signal reflection. These adapters play a critical role in telecommunications, test equipment, aerospace, and industrial applications where reliable RF transmission is required.

2. Main Types and Functional Classification

Type	Function Features	Application Examples
BNC Adapters	Bayonet coupling, quick-connect, 50/75 variants, up to 4 GHz	Test instruments, CCTV systems
N-Type Adapters	Threaded coupling, weatherproof, 0-11 GHz, 50	Cellular base stations, microwave links
SMA Adapters	Threaded, compact, 0-18 GHz, 50	WiFi antennas, RF modules
F-Type Adapters	Compression fittings, 75 , CATV compatible	Cable TV splitters, satellite receivers
TNC Adapters	Threaded BNC variant, vibration-resistant	Military communication systems

3. Structure and Components

Typical physical construction includes:

Center conductor: Precision-machined brass or beryllium copper with gold plating
Dielectric insulator: PTFE or ceramic material maintaining precise spacing
Outer conductor/shield: Brass or stainless steel with nickel plating
Interface mechanism: Threaded (N, SMA), bayonet (BNC), or compression (F-type)

Advanced designs incorporate EMI shielding, environmental sealing (IP68), and low-PIM (Passive Intermodulation) materials.

4. Key Technical Specifications

Parameter	Typical Range	Importance
Frequency Range	DC-40 GHz (varies by type)	Determines application suitability
Impedance	50 or 75	Matching critical for VSWR
VSWR	1.1:1-1.5:1	Measures signal reflection
Insertion Loss	0.1-0.5 dB	Impacts signal strength
Durability	500-5000 mating cycles	Affects long-term reliability

5. Application Areas

Telecommunications: 5G base stations, fiber-wireless systems
Test & Measurement: Spectrum analyzers, signal generators
Aerospace: Avionics, satellite communication systems
Industrial: RFID readers, IoT gateways
Consumer: Set-top boxes, home networking equipment

6. Leading Manufacturers and Products

Manufacturer	Representative Products
Amphenol RF	QN Series quick-connect adapters
TE Connectivity	Deutsch N-Type aerospace adapters
Rosenberger	8GHz SMA calibration kits
Keysight Technologies	3.5mm precision test adapters
ITT Cannon	SL Series space-grade connectors

7. Selection Guidelines

Key considerations:

Match impedance (50 for data/telecom, 75 for video)
Verify frequency requirements (10% headroom recommended)
Assess environmental needs (IP rating, temperature range)
Evaluate mechanical requirements (mating cycles, vibration)
Check industry certifications (MIL-STD, RoHS, REACH)

Example: Selecting N-type female-to-SMA male adapter for 3.5GHz outdoor link requires IP67 rating and <1.3:1 VSWR.

8. Industry Trends

Miniaturization: Development of 1.0/2.3mm connectors for 5G mmWave
Higher frequencies: Adapters supporting 40+GHz for automotive radar
Material innovation: Use of beryllium-free alloys for safety
Smart connectivity: Integrated sensors for condition monitoring
Environmental focus: Lead-free plating and recyclable materials