RF Multiplexers

Image	Part Number	Description / PDF	Quantity	Rfq
	0892DP14A1850 Johanson Technology	RF DIPLEXER 892MHZ/1.85GHZ 1206	0
	2450DP15N5500E Johanson Technology	RF DIPLEXER 2.45GHZ/5.5GHZ 0805	0
	2450DM41A5400 Johanson Technology	RF DIPLEXER MODULE	0
	0892DP15D1940E Johanson Technology	RF DIPLEXER 892MHZ/1.85GHZ 0805	0
	0859DP18B1920E Johanson Technology	RF DIPLEXER 892MHZ/1.92GHZ 1206	0
	2450DP15J5400E Johanson Technology	RF DIPLEXER 2.45GHZ/5.4GHZ 0805	0
	2450DP15G5400E Johanson Technology	RF DIPLEXER 2.45GHZ/5.4GHZ 0805	0
	2450DP15M5500E Johanson Technology	RF DIPLEXER 2.45GHZ/5.5GHZ 0805	0
	0892DP15A1940E Johanson Technology	RF DIPLEXER 892MHZ/1.94GHZ 0805	0
	2450DP15H5400E Johanson Technology	RF DIPLEXER 2.45GHZ/5.4GHZ 0805	0
	1175DP41A1925E Johanson Technology	RF DIPLEXER 1175MZ/1.925GHZ 1210	0
	2450DP39H5500E Johanson Technology	RF DIPLEXER 2.45GHZ/5.5GHZ 1008	0

RF Multiplexers

1. Overview

RF/IF multiplexers are devices that route high-frequency signals (typically 300 MHz to 6 GHz for RF, and 10 MHz to 1 GHz for IF) between multiple channels. RFID RF multiplexers specialize in managing signals for radio frequency identification systems (125 kHz to 900 MHz). These components enable efficient signal management in wireless communication, industrial automation, and IoT systems, reducing hardware complexity and cost.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Coaxial RF Multiplexer	Mechanical switching with high power handling (up to 100W)	Test equipment, military communication
MMIC-based Multiplexer	Monolithic Microwave IC integration, fast switching ( 1 s)	5G base stations, phased array systems
UHF RFID Multiplexer	Supports EPCglobal Gen2 protocol, 8-16 ports	Warehouse inventory management
Fiber-Optic RF Multiplexer	Optical signal routing, low insertion loss (<1 dB)	Aerospace telemetry systems

3. Structure and Components

Typical construction includes: - Switch matrix (electromechanical relays or PIN diodes) - RF shielding enclosure (aluminum alloy) - SMA/N-type connectors - Control circuitry (TTL/CMOS interface) - Dielectric substrate (RO4000 series for high frequencies)

4. Key Technical Specifications

Parameter	Value Range	Importance
Frequency Range	DC-18 GHz	Determines application compatibility
Insertion Loss	0.3-3.5 dB	Signal integrity preservation
Isolation	20-80 dB	Prevents channel cross-talk
Switching Speed	10 s-10 ms	Affects system response time
VSWR	1.2:1-2.0:1	Impedance matching quality indicator

5. Application Fields

Telecom: Base station antenna sharing
Medical: MRI RF coil switching
Manufacturing: Automated test equipment (ATE)
Logistics: RFID warehouse tracking systems

6. Leading Manufacturers and Products

Vendor	Product Series	Key Features
Analog Devices	ADG9xx	CMOS-based, 0.1-3 GHz, 1.8-5.5V supply
Keysight Technologies	U2000 Series	Optical RF multiplexer with 0.05 dB accuracy
Nordic Semiconductor	nRF24	2.4 GHz, -94 dBm sensitivity for RFID
TE Connectivity	RF Multiplex Switch	IP67 rated for outdoor deployment

7. Selection Guidelines

Consider: 1. Frequency match with application band 2. Signal power handling requirements 3. Environmental conditions (temperature/humidity) 4. Control interface compatibility (SPI/UART) 5. Port count scalability 6. Cost vs. performance trade-offs

8. Industry Trends

Current developments include: - Integration with AI for dynamic signal path optimization - Sub-6 GHz 5G MIMO support expansion - Development of reconfigurable intelligent surfaces (RIS) - RFID multiplexers with embedded sensing capabilities - Miniaturization using LTCC packaging technology