RF Transmitters

Image	Part Number	Description / PDF	Quantity	Rfq
	PCF7922ATT/M1AC07J NXP Semiconductors	IC REMOTE KEYLESS ENTRY 20TSSOP	0
	ATA5757-6DQJ Roving Networks / Microchip Technology	RF TRANSMITTER ASK/FSK 433MHZ	0
	MAX2504AELM-D Maxim Integrated	RF TRANSMITTER CDMA LGA	0
	ATA5791-WDQW-1 Roving Networks / Microchip Technology	IC TX UHF ASK/FSK QFN	0
	MAX14726ETP+T Maxim Integrated	IC RF TRANSMITTER 16TQFN	0
	TH72006KLD-BAA-000-RE Melexis	IC RF TRANSMITTER 10DFN	0
	MPXV8500DK016T1 NXP Semiconductors	RF TX IC FSK 315/434MHZ 32QFN	0
	T5754C-6APJ-66 Roving Networks / Microchip Technology	RF TX IC ASK 429-439MHZ 8VSSOP	0
	SI4710-B31-GMR Silicon Labs	IC RF TXRX VHF 20QFN	0
	MAX2369EGM+D Maxim Integrated	RF TRANSMITTER 120-235MHZ 48QFN	0
	HPA00471RUZR Texas Instruments	IC TXRX RF CMOS FSK/OOK 32QFN	0
	PCF7941XTT/C2AB370 NXP Semiconductors	IC REMOTE KEYLESS ENTRY 20TSSOP	0
	HPA00452RSTR Texas Instruments	IC XMITTER RF MULTI-CHANNEL 16RS	0
	PCF7900NHN/C0K/UJ NXP Semiconductors	FRACTIONAL-N-PLL BASED UHF TRANS	0
	MAX14726ETP+ Maxim Integrated	IC RF TRANSMITTER 16TQFN	0
	SI4011-CC-GT Silicon Labs	IC TRANSMITTER 10MSOP	0
	MAX2850ITK+CFV Maxim Integrated	5GHZ, 4-CHANNEL MIMO TRANSMITTER	0
	CC1150-RTY1 Texas Instruments	RF TX IC 2-FSK 300-348MHZ 16QFN	0
	806-0726-21+ Maxim Integrated	SUB 1GHZ TRANSMITTER	0
	MAX2850ITK+TCFV Maxim Integrated	5GHZ, 4-CHANNEL MIMO TRANSMITTER	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