Coaxial Connectors (RF)

Coaxial Connectors (RF) - Adapters

Part Number	Description / PDF	Quantity
1112-4147 SV Microwave (Amphenol SV Microwave)	SMP FEMALE TO FEMALE BULLET, SPR	50
1112-4009 SV Microwave (Amphenol SV Microwave)	CONN ADAPT PLUG-JACK SMP 50 OHM	44
M55339/34-00001 SV Microwave (Amphenol SV Microwave)	CONN ADAPT JACK-JACK TNC 50 OHM	4
2994-6001 SV Microwave (Amphenol SV Microwave)	CONN ADAPT JACK-PLUG SMA 50 OHM	26
SF1115-6091 SV Microwave (Amphenol SV Microwave)	2.92MM MALE TO SMPS FEMALE ADAPT	13
SF1189-6104 SV Microwave (Amphenol SV Microwave)	CONN ADAPT SMA PLUG TO BMZ JACK	0
1112-6114 SV Microwave (Amphenol SV Microwave)	SMP MALE QB TO SMA MALE ADAPTER	5
SF1129-6154 SV Microwave (Amphenol SV Microwave)	SMA MALE TO SMP FEMALE ADAPTER	70
SF2997-6003 SV Microwave (Amphenol SV Microwave)	CONN ADAPT PLUG-JACK SMA 50 OHM	460
SF1122-6106 SV Microwave (Amphenol SV Microwave)	CONN ADAPT BZ JACK TO SMA PLUG	0
SF1080-6005 SV Microwave (Amphenol SV Microwave)	SMA MALE TO SMPM MALE ADAPTER, F	20
SF1132-6026 SV Microwave (Amphenol SV Microwave)	CONN ADAPT SMPM PLUG TO SMA JACK	50
SF1122-6032 SV Microwave (Amphenol SV Microwave)	CONN ADAPT SMA JACK TO ZMA PLUG	0
1132-6025 SV Microwave (Amphenol SV Microwave)	CONN ADAPT SMPM JACK TO SMA JACK	926
SF1133-6007 SV Microwave (Amphenol SV Microwave)	1.85MM FEMALE TO SMPM FEMALE ADA	35
SF1189-6103 SV Microwave (Amphenol SV Microwave)	CONN ADAPT SMA JACK TO BMZ PLUG	0
SF1112-6036 SV Microwave (Amphenol SV Microwave)	SMP MALE TO SMA FEMALE ADAPTER,	42
SF1109-6005 SV Microwave (Amphenol SV Microwave)	SMA FEMALE TO PTNC MALE ADAPTER	19
1132-4005 SV Microwave (Amphenol SV Microwave)	CONN ADAPT JACK-PLUG SMPM 50 OHM	40
1112-4148 SV Microwave (Amphenol SV Microwave)	SMP FEMALE TO FEMALE BULLET, SPR	50

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