Coaxial Connectors (RF)

Coaxial Connectors (RF) - Adapters

Part Number	Description / PDF	Quantity
R191332000 Radiall USA, Inc.	N F-SMA F BHDP	80
R191621017 Radiall USA, Inc.	NEX 10 SMA 3.5 M ADP	28
R191911000 Radiall USA, Inc.	QMA M-SMA F	23
R317720000 Radiall USA, Inc.	SHV MM STR BHD	17
R191631007 Radiall USA, Inc.	NEX10 M-7/16 M ADP	27
5909-9103-000 Radiall USA, Inc.	SMA FF STR BHD	612
R191313000 Radiall USA, Inc.	SMA F-TNC M	62
R191620007 Radiall USA, Inc.	NEX10 M-N F STR	28
R191419000 Radiall USA, Inc.	N F-BNC M	5
R143730700 Radiall USA, Inc.	TNC18 FF STR BHDP	20
5919-1503-000 Radiall USA, Inc.	SMA MF RA NA	6
R141780000 Radiall USA, Inc.	BNC TEE FF/M	109
R191759000 Radiall USA, Inc.	N F-QN M	39
R191620027 Radiall USA, Inc.	NEX 10 F-N F STR	25
R191620017 Radiall USA, Inc.	NEX 10 F-7/16M ADP	27
R125720000W Radiall USA, Inc.	SMA FF STR BHD	3
R191329000 Radiall USA, Inc.	N M-SMA F	27
R191381000 Radiall USA, Inc.	N F-SMA F SQF	57
R125704000 Radiall USA, Inc.	SMA MF STR	22
R191621007 Radiall USA, Inc.	NEX 10 M-SMA 3.5F ADP	32

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