Coaxial Connectors (RF)

Coaxial Connectors (RF) - Adapters

Part Number	Description / PDF	Quantity
RFD-1660-WB RF Industries	7/16 FEMALE-7/16 MALE	138
RSA-3452 RF Industries	SMA MALE-N FEMALE	0
RFE-6107 RF Industries	N MALE-FME MALE	138
RSA-3402 RF Industries	SMA MALE-SMA FEMALE; R/A	144
RP-3408-1 RF Industries	RP SMA FEMALE-MMCX MALE	65
RP-1226-I RF Industries	RP TNC FEMALE-RP TNC FEMALE BH	274
RFD-225F-716M RF Industries	2.2-5 FEMALE-7/16 DIN MALE	196
RFN-1048-4 RF Industries	N MALE-4.1/9.5 FEMALE	144
RP-1016 RF Industries	RP N MALE-N FEMALE	81
RFD-1650-WB RF Industries	7/16 DIN MALE-7/16 DIN MALE	0
RHV-130 RF Industries	T SHAPE; MHV; 2 FEMALE-1 MALE	43
RSA-3405 RF Industries	SMA MALE-SMA FEMALE	54
RP-3402 RF Industries	RP SMA MALE-SMA FEMALE; R/A	226
RP-3452 RF Industries	RP SMA MALE-N FEMALE	271
RFE-6155 RF Industries	TNC MALE-FME FEMALE	36
RSA-3476 RF Industries	SMA FEMALE-BNC MALE	198
RFE-6110 RF Industries	SMA FEMALE-FME MALE	97
RFE-6150 RF Industries	BNC FEMALE-FME FEMALE	234
RP-3453 RF Industries	RP SMA MALE-N MALE	156
RSA-3413 RF Industries	SMA FEMALE BH-BNC FEMALE	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