Coaxial Connectors (RF)

Coaxial Connectors (RF) - Adapters

Part Number	Description / PDF	Quantity
SF1122-6034 SV Microwave (Amphenol SV Microwave)	CONN ADAPT SMA JACK-ZMA PLUG	0
1132-4021 SV Microwave (Amphenol SV Microwave)	SMPM FEMALE TO FEMALE BULLET (OA	0
1132-4108 SV Microwave (Amphenol SV Microwave)	SMPM MALE TO MALE NON-MAGNETIC T	48
SF1103-6001 SV Microwave (Amphenol SV Microwave)	CONN ADAPT PTNC PLUG TO SMA JACK	44
SF1129-6157 SV Microwave (Amphenol SV Microwave)	SMA MALE TO PTNC MALE ADAPTER	0
1112-4146 SV Microwave (Amphenol SV Microwave)	SMP FEMALE TO FEMALE BULLET, SPR	100
SF1116-6025 SV Microwave (Amphenol SV Microwave)	CONN ADAPT 2.4MM PLG TO SMPS JCK	0
1138-4048 SV Microwave (Amphenol SV Microwave)	SMPS FEMALE TO SMPS MALE VITA 67	0
SF1122-6102 SV Microwave (Amphenol SV Microwave)	CONN ADAPT BZ PLUG TO SMA PLUG	0
SF1112-6034 SV Microwave (Amphenol SV Microwave)	CONN ADAPT SMP PLUG TO SMA JACK	67
1132-4096 SV Microwave (Amphenol SV Microwave)	SMPM FEMALE TO SMPS FEMALE VITA	0
2993-6001 SV Microwave (Amphenol SV Microwave)	CONN ADAPT PLUG-PLUG SMA 50 OHM	0
SF1115-6007 SV Microwave (Amphenol SV Microwave)	CONN ADAPT SMA PLG TO 2.92MM JCK	5
SF1590-6000 SV Microwave (Amphenol SV Microwave)	CONN ADAPT JACK-JACK 2.92MM	62
SF1138-6020 SV Microwave (Amphenol SV Microwave)	VITA 67.3 PLUG-IN ADAPTER SMPS F	18
SF1157-6013 SV Microwave (Amphenol SV Microwave)	CONN ADAPT BMA JACK TO SMA PLUG	24
M55339/29-30001 SV Microwave (Amphenol SV Microwave)	CONN ADAPT PLUG-PLUG SMA 50 OHM	0
SF1116-60143 SV Microwave (Amphenol SV Microwave)	CONN ADAPT SMP PLG TO 2.4MM JACK	0
2991-6002 SV Microwave (Amphenol SV Microwave)	CONN ADAPT JACK-JACK SMA 50 OHM	233
1115-6088 SV Microwave (Amphenol SV Microwave)	2.92MM FEMALE TO SMPM FEMALE ADA	51

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