Coaxial Connectors (RF)

Coaxial Connectors (RF) - Adapters

Part Number	Description / PDF	Quantity
145-0901-821 Vitelec / Cinch Connectivity Solutions	CONN ADAPT PLUG TO JACK 2.92MM	232
ADT-2735-FF-3MM-02 Vitelec / Cinch Connectivity Solutions	CONN ADAPT JACK-JACK 3.5MM 50OHM	73
UBJ28GF Vitelec / Cinch Connectivity Solutions	CONN ADAPT JACK-JACK BNC 75OHM	14
134-1000-015 Vitelec / Cinch Connectivity Solutions	ADAPTER 2.4MM PLUG - SMP PLUG	25
BJ158 Vitelec / Cinch Connectivity Solutions	CONN ADAPT JCK-JCK TRS TWIN/TRI	21
ADT-2699-TF-SMF-02 Vitelec / Cinch Connectivity Solutions	CONN ADAPT TNC JACK TO SMA JACK	142
134-1019-441 Vitelec / Cinch Connectivity Solutions	ADAPTER SMA PLUG TO SMP PLUG	84
VNA100-1 Vitelec / Cinch Connectivity Solutions	CONN ADAPT JACK-JACK N 50 OHM	96
BJ378 Vitelec / Cinch Connectivity Solutions	CONN ADAPT JCK-JCK TRT TWIN/TRI	31
134-1000-012 Vitelec / Cinch Connectivity Solutions	ADAPTER 2.4MM PLUG - 2.92MM JACK	1
BN73 Vitelec / Cinch Connectivity Solutions	CONN ADAPT PLUG-JCK TRB TWIN/TRI	107
149-0901-821 Vitelec / Cinch Connectivity Solutions	1.0MM FEMALE TO FEMALE ADAPTER	10
26-8014 Vitelec / Cinch Connectivity Solutions	CONN ADAPT N JACK TO UHF PLUG	116
ADPL75-E1-UBJ20 Vitelec / Cinch Connectivity Solutions	CONN ADAPT TRB PLUG TO BNC JACK	40
ADBJ20-E1-BJ79 Vitelec / Cinch Connectivity Solutions	CONN ADAPT BNC JACK TO TRB JACK	106
CP-AD511 Vitelec / Cinch Connectivity Solutions	CONN ADAPT PLUG-PLUG BNC 50 OHM	352
26-8016 Vitelec / Cinch Connectivity Solutions	CONN ADAPT N PLUG TO BNC JACK	591
134-1019-461 Vitelec / Cinch Connectivity Solutions	ADAPTER SMA JACK TO SMP JACK	363
BJ48 Vitelec / Cinch Connectivity Solutions	CONN ADAPT JACK-JACK TNC 50 OHM	42
134-1012-021 Vitelec / Cinch Connectivity Solutions	CONN ADAPT SMA PLUG TO SMB PLUG	47

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