RF Transmitters

Image	Part Number	Description / PDF	Quantity	Rfq
	NRF24E2G-REEL7 Nordic Semiconductor	RF XMITTER GFSK 2.4GHZ 36VFQFN	0
	TXM-433-RM Linx Technologies	RF XMITTER ASK/OOK 433MHZ 6SIP	0
	PCF7941ATS/3391/2A NXP Semiconductors	IC RF REMOTE WIRELESS 20-SSOP	0
	NRF24E2G Nordic Semiconductor	RF XMITTER GFSK 2.4GHZ 36VFQFN	0
	MAX14726ETE+ Maxim Integrated	IC RF TRANSMITTER 16TQFN	0
	MAX2369EGM+TD Maxim Integrated	RF TRANSMITTER 120-235MHZ 48QFN	0
	MAX2504AELM-TD Maxim Integrated	RF TRANSMITTER CDMA LGA	0
	NRF24E2G-REEL Nordic Semiconductor	RF XMITTER GFSK 2.4GHZ 36VFQFN	0
	PCF7961ETT/M1AC160 NXP Semiconductors	RF XMITTER ASK/FSK 315/434MHZ	0
	WRL-14740 SparkFun	HX1 VHF NARROW BAND FM APRS TRAN	0
	CC2550-RTR1 Texas Instruments	RF TX IC 2-FSK/ASK 2.4GHZ 16QFN	0
	U2741B-NFBG3Y Roving Networks / Microchip Technology	RF TX IC ASK 300-450MHZ 16LSSOP	0
	SI4011-CC-GTR Silicon Labs	IC TRANSMITTER 10MSOP	0
	SI4710-B31-GM Silicon Labs	IC RF TXRX VHF 20QFN	0
	PCF7961XTTC1AE0915 NXP Semiconductors	RF XMITTER ASK/FSK 315/434MHZ	0
	FM-RTFQ2-433R RF Solutions	RF TX IC FM 433.92MHZ 5SIP MOD	0
	PCF7941ATT/3601/2A NXP Semiconductors	IC RF REMOTE WIRELESS 20-TSSOP	0
	AM-RT4-433 RF Solutions	RF TX IC AM 303.8-433.92MHZ MOD	0
	BCM85810THILGG Broadcom	MICROWAVE TRANSMITTER ON A CHIP	0
	PCF7922ATTM1AE0700 NXP Semiconductors	IC RF REMOTE WIRELESS 20-TSSOP	0

RF Transmitters

1. Overview

RF (Radio Frequency) transmitters are electronic devices that generate and transmit high-frequency electromagnetic waves for wireless communication. IF (Intermediate Frequency) components process signals at intermediate stages in transceivers. RFID (Radio Frequency Identification) RF transmitters specifically enable contactless data exchange between tags and readers. These technologies form the backbone of modern wireless systems, supporting applications from mobile communications to IoT networks.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
ISM Band Transmitters	Unlicensed operation at 2.4 GHz/900 MHz	Wi-Fi routers, Bluetooth devices
Cellular Transmitters	5G/LTE protocol support with power control	Smartphones, base stations
UHF RFID Readers	860-960 MHz frequency agility	Warehouse inventory systems
HF RFID Modules	13.56 MHz contactless payment support	Access control terminals

3. Structure and Components

Typical RF transmitter architecture includes: Power Amplifier (PA) for signal boosting, Voltage-Controlled Oscillator (VCO) for frequency generation, modulator for data encoding, impedance matching networks, and antenna interfaces. Advanced systems integrate DSP cores for digital modulation (QAM, OFDM) and temperature-compensated crystal oscillators (TCXO) for stability. RFID variants add protocol-specific encoding circuits and impedance-tuned front-ends.

4. Key Technical Specifications

Parameter	Significance
Frequency Range: 300 MHz - 6 GHz	Determines application compliance (e.g., FCC Part 15.247)
Output Power: 0.1 - 30 dBm	Affects transmission distance and regulatory class
Modulation Accuracy: EVM < 5%	Ensures data integrity in dense environments
Current Consumption: 5-100 mA	Battery life consideration for IoT devices

5. Application Fields

Telecommunications: 5G small cells, satellite modems
Logistics: UHF RFID for supply chain tracking
Healthcare: Medical implant telemetry systems
Retail: NFC payment terminals (13.56 MHz HF RFID)

Case Study: Amazon's warehouse robots use 868 MHz RFID readers for real-time inventory with 5 cm accuracy.

6. Leading Manufacturers and Products

Vendor	Representative Product
TI (Texas Instruments)	CC1352P7 multi-band wireless MCU
Nordic Semiconductor	nRF52840 Bluetooth 5.3 SoC
Impinj	R420 UHF Gen2 RFID reader
STMicroelectronics	CR95HF NFC/RFID transceiver

7. Selection Guidelines

Determine regulatory requirements (FCC/ETSI compliance)
Match frequency to use case (e.g., 900 MHz for liquid penetration)
Evaluate environmental factors (temperature, interference)
Assess protocol compatibility (LoRaWAN, BLE 5.4)
Optimize power vs. range trade-offs

8. Industry Trends

Key developments include: - 5G integration with sub-6 GHz RF front-ends - RFID moving to microwave frequencies (2.45 GHz active tags) - AI-enhanced spectrum sensing for dynamic frequency selection - Miniaturization via SiP (System-in-Package) technology - Energy harvesting transmitters for battery-free IoT