Coaxial Connectors (RF)

Coaxial Connectors (RF) - Adapters

Part Number	Description / PDF	Quantity
M55339/34-30001 SV Microwave (Amphenol SV Microwave)	CONN ADAPT JACK-JACK TNC 50 OHM	17
SF1132-6094 SV Microwave (Amphenol SV Microwave)	SMPM MALE TO 2.92MM FEMALE BULKH	25
SF1133-6010 SV Microwave (Amphenol SV Microwave)	CONN ADAPT PLUG-JACK 1.85MM	0
1180-6051 SV Microwave (Amphenol SV Microwave)	SYNAPSE MALE TO 1.85MM MALE ADAP	25
SF1132-6070 SV Microwave (Amphenol SV Microwave)	1.85MM FEMALE TO SMPM MALE ADAPT	25
M55339/44-30001 SV Microwave (Amphenol SV Microwave)	CONN ADAPT SMA JACK TO BNC PLUG	0
SF1134-6007 SV Microwave (Amphenol SV Microwave)	CONN ADAPT PTNC JACK TO SMA JACK	151
SF2991-6007 SV Microwave (Amphenol SV Microwave)	CONN ADAPT JACK-JACK SMA 50 OHM	263
SF1597-6003 SV Microwave (Amphenol SV Microwave)	CONN ADAPT PLUG-JACK 2.92MM	0
SF1132-6001 SV Microwave (Amphenol SV Microwave)	CONN ADAPT SMA JACK TO PN JACK	25
SF1132-6078 SV Microwave (Amphenol SV Microwave)	2.92MM FEMALE TO SMPM MALE QB AD	21
SF1133-6008 SV Microwave (Amphenol SV Microwave)	CONN ADAPT JACK-JACK 1.85MM	0
SF1116-6007 SV Microwave (Amphenol SV Microwave)	CONN ADAPT 2.4MM PLG-2.92MM PLUG	31
1180-4009 SV Microwave (Amphenol SV Microwave)	3MM FEMALE TO FEMALE BULLET	40
SF1115-6081 SV Microwave (Amphenol SV Microwave)	2.92MM MALE TO SMP MALE ADAPTER,	23
SF1132-6037 SV Microwave (Amphenol SV Microwave)	CONN ADAPT PLUG-PLUG SMPM 50 OHM	16
2990-6005 SV Microwave (Amphenol SV Microwave)	CONN ADAPT JACK-JACK SMA 50 OHM	72
SF1116-6070 SV Microwave (Amphenol SV Microwave)	2.4MM FEMALE TO SMPM FEMALE ADAP	10
SF1114-6008 SV Microwave (Amphenol SV Microwave)	CONN ADAPT BMMA PLUG TO SMA JACK	43
SF1114-6006 SV Microwave (Amphenol SV Microwave)	CONN ADAPT BMMA JACK TO SMA PLUG	0

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