RF Multiplexers

Image	Part Number	Description / PDF	Quantity	Rfq
	B39781B8511P810 RF360 - A Qualcomm-TDK joint venture	SAW FILTER	0
	B39781B8620P810 RF360 - A Qualcomm-TDK joint venture	SAW FILTER	0
	B39212B8565P810 RF360 - A Qualcomm-TDK joint venture	RF DUPLEXER 9SMD NO LEAD	0
	B39851B8084P810 RF360 - A Qualcomm-TDK joint venture	RF DIPLEXER 9SMD NO LEAD	0
	B39212B8524P810 RF360 - A Qualcomm-TDK joint venture	RF DUPLEXER 1.7325/2.1325GHZ SMD	0
	B39142B8560P810 RF360 - A Qualcomm-TDK joint venture	RF DUPLEXER 1.4379/1.4859GHZ SMD	0
	B39272B8660P810 RF360 - A Qualcomm-TDK joint venture	RF DUPLEXER 2.535/2.655GHZ 9SMD	0
	B39781B8525P810 RF360 - A Qualcomm-TDK joint venture	RF DIPLEXER 9SMD NO LEAD	0
	B39182B9940P810 RF360 - A Qualcomm-TDK joint venture	FILTER SAW 1511 SMD	0
	B39741B8624P810 RF360 - A Qualcomm-TDK joint venture	RF DUPLEXER 710MHZ/740MHZ 9SMD	0
	B39272B8674P810 RF360 - A Qualcomm-TDK joint venture	RF DUPLEXER 2.535/2.655GHZ 8SMD	0
	B39941B8073P810 RF360 - A Qualcomm-TDK joint venture	RF DUPLEXER 897.5/942.5MHZ 9SMD	0
	B39881B7925P810 RF360 - A Qualcomm-TDK joint venture	RF DUPLEXER 836.5/881.5MHZ 9SMD	0
	B39741B8668P810 RF360 - A Qualcomm-TDK joint venture	RF DIPLEXER 8SMD NO LEAD	0
	B39931B4062U810 RF360 - A Qualcomm-TDK joint venture	RF DIPLEXER 8SMD NO LEAD	0
	B39182B9943P810 RF360 - A Qualcomm-TDK joint venture	FILTER SAW 1511 SMD	0
	B39142B8632P810 RF360 - A Qualcomm-TDK joint venture	RF DUPLEXER 1.4379/1.4859GHZ SMD	0
	B39741B8628P810 RF360 - A Qualcomm-TDK joint venture	RF DUPLEXER 710MHZ/740MHZ 8SMD	0
	B39941B8516P810 RF360 - A Qualcomm-TDK joint venture	RF DUPLEXER 897.5/942.5MHZ 9SMD	0
	B39262B8032P810 RF360 - A Qualcomm-TDK joint venture	RF DUPLEXER 2.535/2.655GHZ 9SMD	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