Coaxial Connectors (RF)

Coaxial Connectors (RF) - Adapters

Part Number	Description / PDF	Quantity
125-0901-801 Vitelec / Cinch Connectivity Solutions	CONN ADAPT JACK-JACK SMPM 50 OHM	1517
VBA107 Vitelec / Cinch Connectivity Solutions	CONN ADAPT PLUG TO JACK BNC	3
25-7500 Vitelec / Cinch Connectivity Solutions	CONN ADAPT BNC PLUG TO F JACK	369
134-1000-025 Vitelec / Cinch Connectivity Solutions	ADAPTER 1.85MM JACK-SMPM PLUG	10
142-0901-821 Vitelec / Cinch Connectivity Solutions	CONN ADAPT PLUG TO JACK SMA	238
HDVDPT Vitelec / Cinch Connectivity Solutions	CONN ADAPT BNC JACK - WECO, MINI	0
3-0349-9 Vitelec / Cinch Connectivity Solutions	ADAPTER TRB JACK TO SMP BKHD	5
PN2A Vitelec / Cinch Connectivity Solutions	CONN ADAPT PLUG-JACK BNC 50 OHM	8
VBA109 Vitelec / Cinch Connectivity Solutions	CONN ADAPT PLUG TO JACK BNC	2
CP-AD356 Vitelec / Cinch Connectivity Solutions	CONN ADAPT JACK-JACK TNC 50 OHM	11
TEBC-1005 Vitelec / Cinch Connectivity Solutions	MIL-STD-1553 DATA BUS COUPLER, 5	10
25-7200L Vitelec / Cinch Connectivity Solutions	CONN ADAPT JACK-JACK F 75 OHM	1619
29-3840 Vitelec / Cinch Connectivity Solutions	CONN ADAPT N PLUG TO SMA JACK	1459
TN2A Vitelec / Cinch Connectivity Solutions	CONN ADAPT PLUG-JCK TRB TWIN/TRI	113
ADT-2714-NF-3MM-02 Vitelec / Cinch Connectivity Solutions	CONN ADAPT 3.5MM PLUG TO N JACK	10
UBJ28 Vitelec / Cinch Connectivity Solutions	CONN ADAPT JACK-JACK BNC 75 OHM	168
ADT-2581-NM-SMF-02 Vitelec / Cinch Connectivity Solutions	CONN ADAPT N PLUG TO SMA JACK	57
127-0901-801 Vitelec / Cinch Connectivity Solutions	CONN ADAPT JACK-JACK SMP 50 OHM	2051
CPAD210 Vitelec / Cinch Connectivity Solutions	CONN ADAPT JACK-JACK UHF	0
ADBJ77-E1-UPL20 Vitelec / Cinch Connectivity Solutions	CONN ADAPT BNC PLUG TO TRB JACK	23

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