RF Receiver, Transmitter, and Transceiver Finished Units

Part Number	Description / PDF	Quantity
451-00004 Laird Connectivity	USB BL654 NRF52840 BLUETOOTH 5	0
455-00070 Laird Connectivity	LORA 915MHZ PORT TEMP SENSOR NA	72
455-00100 Laird Connectivity	LORA BLE TEMP/HUMID/SWITCH SG	40
455-00068 Laird Connectivity	LORA 923MHZ PORT TEMP SENSOR AUS	40
BT900-US Laird Connectivity	MOD BLUETOOTH DONGLE USB V4.0	300
455-0001 Laird Connectivity	TEMP HUMIDITY SENSOR LORA & BLE	551
BT851 Laird Connectivity	RF BLUETOOTH V5.0 USB 2.4GHZ	865
455-00071 Laird Connectivity	LORA BLE TEMP/HUMID/SWITCH TWN	40
CL4490-1000-232-SP Laird Connectivity	TXRX 900MHZ RS232 1W W/ANT'S DB9	247
CL4790-1000-485 Laird Connectivity	TXRX 900MHZ RS485 1W W/ANT DB9	6
455-00059 Laird Connectivity	LORA 923MHZ TEMP/HUMID SENSOR TA	40
455-00036B Laird Connectivity	213MM SS TEMP PROBE 1320MM BULK	0
455-00067 Laird Connectivity	LORA 915MHZ PORT TEMP SENSOR AUS	36
455-00065 Laird Connectivity	LORA 923MHZ PORT TEMP SENSOR NZ	37
CL4490-1000-PRO Laird Connectivity	TXRX 900MHZ PRO 1W W/ANT DB9	135
BL620-US Laird Connectivity	BLE MOD USB DONGLE SMARTBASIC	26
455-00114 Laird Connectivity	IG60-BL654-LTE & BT510 STARTER K	19
455-00063 Laird Connectivity	LORA 923MHZ TEMP/HUMID SENSOR AU	38
CL4490-1000-PRO-SP Laird Connectivity	TXRX 900MHZ PRO 1W W/ANT'S DB9	4
455-00061 Laird Connectivity	LORA 923MHZ TEMP/HUMID SENSOR HK	40

RF Receiver, Transmitter, and Transceiver Finished Units

1. Overview

RF (Radio Frequency)/IF (Intermediate Frequency) and RFID (Radio Frequency Identification) finished units are critical components in wireless communication systems. These devices enable signal reception, transmission, and bidirectional communication through electromagnetic waves. RF/IF units typically operate in the radio frequency spectrum (3 kHz 300 GHz) and intermediate frequency ranges (typically 455 kHz for AM radios or 10.7 MHz for FM), while RFID systems use specific ISM (Industrial, Scientific, Medical) bands (e.g., 125 kHz, 13.56 MHz, 900 MHz). Their importance spans telecommunications, IoT, logistics, healthcare, and industrial automation.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
RF Receiver	Demodulates incoming RF signals, amplifies weak signals, and filters noise	AM/FM radios, Wi-Fi routers, satellite communication systems
RF Transmitter	Generates and amplifies RF signals for wireless transmission	Cellular base stations, Bluetooth devices, RFID readers
RF Transceiver	Combines receiver and transmitter functions with duplexing capabilities	Smartphones, Zigbee modules, 5G infrastructure
RFID Reader	Interrogates RFID tags and processes backscattered signals	Inventory management, access control systems
RFID Tag	Passive/active device storing unique identification data	Asset tracking, retail payment systems

3. Structure and Components

Typical physical structures include:

Antenna Interface: Dipole, patch, or loop antennas for signal coupling
RF Front-End: Low-noise amplifiers (LNAs), power amplifiers (PAs), and frequency synthesizers
Mixing Stage: Converts signals between RF and IF/baseband using local oscillators (LOs)
Digital Baseband: ADC/DAC converters, DSP/FPGA for signal processing
Power Supply: Regulated DC sources or energy-harvesting circuits (for passive RFID tags)

4. Key Technical Specifications

Parameter	Description	Importance
Frequency Range	Operating bandwidth (e.g., 2.4 GHz ISM band)	Determines application compatibility
Receiver Sensitivity	Minimum detectable signal level (e.g., -120 dBm)	Impacts communication range and reliability
Output Power	Transmit signal strength (e.g., +30 dBm)	Dictates coverage area and regulatory compliance
Data Rate	Maximum transmission speed (e.g., 1 Mbps)	Critical for real-time applications
Power Consumption	Operating current/voltage requirements	Affects battery life and thermal management

5. Application Fields

Telecommunications: 5G NR base stations, microwave backhaul links
Healthcare: Wireless patient monitoring systems (e.g., Medtronic CareLink)
Retail: RFID-based inventory tracking (e.g., Amazon Go stores)
Automotive: Keyless entry systems (e.g., Tesla Model S passive entry)
Industrial: Wireless sensor networks (e.g., Siemens SIMATIC NET)

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Qualcomm	WTR5975 RF Transceiver	Supports 2G 5G, 20 MHz bandwidth
NXP Semiconductors	UHF RFID Reader IC SL900A	900 MHz, 128-bit security encryption
Texas Instruments	CC2640R2F Bluetooth Transceiver	BLE 5.0, 5 mm 5 mm QFN package
STMicroelectronics	SPBTLE-RF Evaluation Board	868/915 MHz ISM band operation

7. Selection Guidelines

Key considerations include:

Frequency compatibility with target environment
Link budget analysis (distance, obstacles, fading)
Regulatory certifications (FCC, ETSI, RoHS)
Environmental factors (temperature, humidity, EMI)
Integration requirements (form factor, interface protocols)

8. Industry Trends

Future developments focus on:

Ultra-wideband (UWB) for precise localization
Massive MIMO integration in 5G transceivers
Energy-harvesting RFID tags for IoT
AI-driven dynamic spectrum management
Miniaturization via System-on-Chip (SoC) designs