Coaxial Connectors (RF)

Coaxial Connectors (RF) - Adapters

Part Number	Description / PDF	Quantity
RSA-3473 RF Industries	SMA FEMALE-TNC FEMALE	159
RSA-3410 RF Industries	SMA FEMALE-SMA FEMALE BH	560
RFU-630-8 RF Industries	MUHF MALE-MUHF FEMALE; R/A	125
RT-1226 RF Industries	TNC FEM-TNC FEM BH; LEFT THREADS	29
RP-3472 RF Industries	RP SMA FEMALE-RP TNC MALE	35
RP-1015 RF Industries	RP N FEMALE-N MALE	214
RFN-1045-4 RF Industries	N MALE-4.1/9.5 MALE	298
RSA-3470 RF Industries	SMA FEMALE-MINI UHF MALE	101
RSA-3477-03 RF Industries	SMA FEMALE-N FEMALE BH	425
RFE-6108 RF Industries	TNC MALE-FME MALE	170
RP-1234 RF Industries	RP TNC MALE-N FEMALE	61
RSA-3471 RF Industries	SMA FEMALE-MHF FEMALE	25
RFE-6152 RF Industries	MUHF FEMALE-FME FEMALE	131
RSA-3408-1 RF Industries	SMA FEMALE-MMCX MALE	138
RSA-3477 RF Industries	SMA FEMALE-N FEMALE	159
RFB-1734-2 RF Industries	BNC FEMALE-BNC FEMALE; 75 OHM	131
RFU-625 RF Industries	MUHF FEMALE-N MALE	747
RSA-3403 RF Industries	SMA MALE-SMA MALE	47
RFE-6112 RF Industries	UHF MALE-FME MALE	41
RFE-6151 RF Industries	BNC MALE-FME FEMALE	84

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