Coaxial Connectors (RF)

Coaxial Connectors (RF) - Adapters

Part Number	Description / PDF	Quantity
0733861221 Woodhead - Molex	BSA, BNC JACK/BNC JACK,PUSH-ON,	100
HDVDP Vitelec / Cinch Connectivity Solutions	CONN ADAPT BNC JACK TO WECO JACK	0
60S101-SIMN1 Rosenberger	7/16 ADAPTER	0
08KR121-S0AS3 Rosenberger	PRECISION 1.85 TESTPORT ADAPTER	0
000-79700 Connex (Amphenol RF)	CONN ADAPT PLUG TO JACK TNC	21
SF1115-6082 SV Microwave (Amphenol SV Microwave)	2.92MM MALE TO SMP FEMALE ADAPTE	0
ADAPT/SMAM/SMAF/RA Siretta	CONN ADAPT SMA PLUG TO SMA JACK	0
031-218-75-12G Connex (Amphenol RF)	ADAPTER, BNC PLUG TO BNC PLUG, 1	13
TMA-8FS-9MS-00 CIT (Carlisle Interconnect Technologies)	MW ADAPTER 1.85(F) TO 2.92(M)	16
BJ224 Vitelec / Cinch Connectivity Solutions	CONN ADAPT JACK-JACK BNC 50OHM	28
112456 Connex (Amphenol RF)	CONN ADAPT JACK-JACK BNC 75 OHM	19
AD-4310P4310J-2 Connex (Amphenol RF)	CONN ADAPT PLUG-JACK 4.3/10	20
6754 Pomona Electronics	CONN ADAPT PLUG TO JACK BNC	1136
132B9505 Winchester Electronics	CONN ADAPT N JACK TO SMA JACK	154
HRMJ-U.FLP-ST1(40) Hirose	CONN ADAPT SMA JACK TO U.FL PLUG	76
5228226-1 TE Connectivity AMP Connectors	CONN ADAPT JACK-JACK BNC 50 OHM	123
SF1189-6001 SV Microwave (Amphenol SV Microwave)	CONN ADAPT SMA JACK TO BMZ JACK	19
M55339/53-30001 SV Microwave (Amphenol SV Microwave)	CONN ADAPT PLUG-PLUG SMA 50 OHM	9
1059724-1 TE Connectivity AMP Connectors	CONN ADAPT SMA JACK TO OSP JACK	120
242131 Connex (Amphenol RF)	CONN ADAPT TNC PLUG TO N JACK	609

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