Coaxial Connectors (RF)

Coaxial Connectors (RF) - Adapters

Part Number	Description / PDF	Quantity
112444 Connex (Amphenol RF)	CONN ADAPT JACK-JACK BNC 75 OHM	398
031-208-1051 Connex (Amphenol RF)	CONN ADAPT PLUG-JACK BNC 50 OHM	57
AD-NPHDBNCJ-1 Connex (Amphenol RF)	N PLUG TO HD-BNC JACK 75 OHM 12G	22
242263 Connex (Amphenol RF)	CONN ADAPT QMA JACK TO SMA PLUG	125
142248 Connex (Amphenol RF)	CONN ADAPT PLUG TO JACK SMB	335
31-6109 Connex (Amphenol RF)	CONN ADAPT AMC JACK-RP-BNC JACK	0
242113 Connex (Amphenol RF)	CONN ADAPT N PLUG TO SMA JACK	2010
242282 Connex (Amphenol RF)	CONN ADAPT N JACK - 4.1/9.5 PLUG	24
APH-HDBNCP-SMAP Connex (Amphenol RF)	CONN ADAPT HDBNC PLUG-SMA PLUG	76
242152-75 Connex (Amphenol RF)	CONN ADAPT N JACK TO F PLUG	13
901-10565 Connex (Amphenol RF)	SMA STRAIGHT JACK TO PLUG ADAPTE	97
901-9219-ASF Connex (Amphenol RF)	CONN ADAPT JACK TO PLUG SMA	19
172261 Connex (Amphenol RF)	CONN ADAPT PLUG-PLUG N 50 OHM	192
APH-HDBNCJ-SMAJ Connex (Amphenol RF)	CONN ADAPT HDBNC JACK - SMA JACK	95
APH-BNCP-HDBNCP Connex (Amphenol RF)	CONN ADAPT HDBNC PLUG - BNC PLUG	20
172123-10 Connex (Amphenol RF)	CONN ADAPT JACK-JACK N 50 OHM	78
242129 Connex (Amphenol RF)	CONN ADAPT SMA JACK TO MCX JACK	51
222157 Connex (Amphenol RF)	CONN ADAPT PLUG TO JACK F 75 OHM	154
242178-10 Connex (Amphenol RF)	CONN ADAPT SMA JACK TO TNC JACK	323
242127 Connex (Amphenol RF)	CONN ADAPT MCX PLUG TO SMA JACK	389

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