Coaxial Connectors (RF)

Coaxial Connectors (RF) - Adapters

Part Number	Description / PDF	Quantity
242166 Connex (Amphenol RF)	CONN ADAPT N PLUG TO MMCX JACK	11
SF1116-6023 SV Microwave (Amphenol SV Microwave)	CONN ADAPT 2.4MM PLG TO SMPS PLG	0
000-12650 Connex (Amphenol RF)	CONN ADAPT JACK-JACK MHV	86
BJ78 Vitelec / Cinch Connectivity Solutions	CONN ADAPT JCK-JCK TRB TWIN/TRI	1083
SF1187-6624 SV Microwave (Amphenol SV Microwave)	CONN ADAPT SMA JACK TO ZMA JACK	17
SF2993-6001 SV Microwave (Amphenol SV Microwave)	CONN ADAPT PLUG-PLUG SMA 50 OHM	29
ADP-NF-FM RF Solutions	CONN ADAPT N JACK TO F PLUG	41
6712 Pomona Electronics	CONN ADAPT PLUG TO JACK F 75 OHM	11
CT3393 Cal Test Electronics	CONN ADAPT PLUG-JACK SMA 50 OHM	0
1056336-1 TE Connectivity AMP Connectors	CONN ADAPT PLUG-PLUG OSM 50 OHM	0
03S121-K00S3 Rosenberger	PRECISION 3.5 ADAPTER	0
082-99 Connex (Amphenol RF)	CONN ADAPT JACK-JACK N 50 OHM	3
31-217-RFX Connex (Amphenol RF)	CONN ADAPT BNC PLUG TO N JACK	9
153155011 Winchester Electronics	CONN ADAPT 7/16 PLUG TO N JACK	30
M55339/31-30001 SV Microwave (Amphenol SV Microwave)	CONN ADAPT JACK-JACK SMA 50 OHM	78
172276 Connex (Amphenol RF)	CONN ADAPT PLUG TO JACK N 50 OHM	65
J01462A0002 Telegärtner	2.2-5 ADAPTER SCREW - SCREW	1
112440 Connex (Amphenol RF)	CONN ADAPT JACK-JACK BNC 75 OHM	416
31-70020 Connex (Amphenol RF)	CONN ADAPT JACK-JACK BNC 75 OHM	118
122345 Connex (Amphenol RF)	CONN ADAPT JACK-JACK TNC 75 OHM	64

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