RF Switches

Image	Part Number	Description / PDF	Quantity	Rfq
	HMC241LP3 Analog Devices, Inc.	IC RF SWITCH SP4T 4GHZ 16SMT	0
	HMC241AQS16TR Analog Devices, Inc.	IC RF SWITCH SP4T 3.5GHZ 16QSOP	0
	HMC253QS24E Analog Devices, Inc.	IC RF SWITCH SP8T 2.5GHZ 24QSOP	0
	HMC641-SX Analog Devices, Inc.	IC RF SWITCH SP4T 18GZ DIE 1=2PC	0
	HMC252QS24ETR Analog Devices, Inc.	IC RF SWITCH SP6T 3GHZ 24QSOP	0
	HMC245QS16ETR Analog Devices, Inc.	IC RF SWITCH SP3T 3.5GHZ 16QSOP	0
	HMC245AQS16TR Analog Devices, Inc.	IC RF SWITCH SP3T 3.5GHZ 16QSOP	0
	HMC435AMS8GTR Analog Devices, Inc.	IC RF SWITCH SPDT 4GHZ 8MSOP	0
	HMC232LP4E Analog Devices, Inc.	IC RF SWITCH SPDT 12GHZ 24QFN	0
	HMC241LP3E Analog Devices, Inc.	IC RF SWITCH SP4T 4GHZ 16SMT	0
	HMC-SDD112 Analog Devices, Inc.	IC RF SWITCH SPDT 86GHZ DIE	0
	HMC253QS24 Analog Devices, Inc.	IC RF SWITCH SP8T 2.5GHZ 24QSOP	0
	HMC221AE Analog Devices, Inc.	IC RF SWITCH SPDT 3GHZ SOT26	0
	HMC547ALC3TR-R5 Analog Devices, Inc.	IC RF SWITCH SPDT 28GHZ 16SMT	0
	HMC321LP4ETR Analog Devices, Inc.	IC RF SWITCH SP8T 8GHZ 24SMT	0
	HMC574MS8ETR Analog Devices, Inc.	IC RF SWITCH SPDT 3GHZ 8MSOP	0
	ADG936BRU-R-500RL7 Analog Devices, Inc.	IC RF SWITCH SPDT 2GHZ 20TSSOP	0
	HMC322LP4 Analog Devices, Inc.	IC RF SWITCH SP8T 8GHZ 24QFN	0
	HMC252QS24TR Analog Devices, Inc.	IC RF SWITCH SP6T 3GHZ 24QSOP	0
	HMC182S14 Analog Devices, Inc.	IC RF SWITCH SP4T 2GHZ 14SOIC	0

RF Switches

1. Overview

RF (Radio Frequency) and IF (Intermediate Frequency) switches are critical components in wireless communication systems, enabling signal routing between transmitter, receiver, and antenna. RFID (Radio Frequency Identification) RF switches specifically manage signal paths in RFID readers and tags. These electromechanical or solid-state devices operate in frequency ranges from kHz to GHz, playing vital roles in 5G, IoT, and industrial automation.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Electromechanical Switches	High isolation (>85dB), low insertion loss (<0.5dB), limited lifespan (10⁷ cycles)	Lab test equipment, fixed wireless systems
Solid-State Switches	Fast switching speed (<20ns), 50 impedance, moderate power handling (30dBm)	5G base stations, software-defined radios
MEMS Switches	Ultra-low insertion loss (0.2dB), high linearity, vacuum encapsulation	Aerospace phased arrays, medical imaging
RFID Antenna Switches	Impedance matching networks, HF/UHF band optimization	Smart logistics, access control systems

3. Structure and Components

Typical RF switches consist of: - Housing: Aluminum alloy or ceramic packages - Contact system: Gold-plated beryllium copper contacts - Actuator: Electromagnetic coil or MEMS membrane - RF ports: SMA/N-type connectors or surface-mount pads - Dielectric materials: PTFE or ceramic insulators

4. Key Technical Specifications

Parameter	Typical Values	Importance
Frequency Range	DC-18GHz (standard)	Determines application bandwidth
Insertion Loss	0.3-2.0 dB	Affects signal strength
Isolation	40-100 dB	Prevents signal interference
Power Handling	10W-100W	Limits maximum operational power
Switching Speed	5ms-50ns	Impacts system response time

5. Application Fields

Telecommunications: Base station antenna switching
Industrial: IoT gateway signal routing
Medical: MRI machine RF path control
Automotive: Tire pressure monitoring systems
Retail: Smart shelf inventory management

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Keysight Technologies	U1880A	67GHz bandwidth, 500ns switching speed
Analog Devices	ADG904	4-channel, 3GHz, CMOS process
STMicroelectronics	AFBR-5010	MEMS-based, 0.15dB insertion loss
Infineon	BTS724G	Automotive-grade, 40V load protection

7. Selection Recommendations

Key considerations: - Frequency matching with system requirements - Power handling capacity with 20% safety margin - Environmental factors (temperature, vibration) - Lifecycle requirements (electromechanical vs. solid-state) - Cost vs. performance trade-offs

8. Industry Trends

Future developments include: - Millimeter-wave switches for 5G/6G (28-100GHz) - Integrated passive devices (IPDs) with embedded switches - Energy-harvesting RFID switch solutions - AI-driven smart switch arrays for dynamic spectrum sharing - Nano-MEMS technology achieving sub-10ns switching