RF Transmitters

Part Number	Description / PDF	Quantity
MICRF114T-I/OT Roving Networks / Microchip Technology	RF XMITTER 285-445MHZ SOT23-6	249
ATA8403C-6AQY-66 Roving Networks / Microchip Technology	RF TX IC ASK 868-928MHZ 8TSSOP	302
ATA8402C-6AQY-66 Roving Networks / Microchip Technology	RF TX IC ASK 429-439MHZ 8TSSOP	55
ATA5757C-6DQY-66 Roving Networks / Microchip Technology	RF TX IC ASK/FSK 433MHZ 10TFSOP	954
MICRF112YMM Roving Networks / Microchip Technology	RF TX IC ASK 300-450MHZ 10TFSOP	1013
PIC12LF1840T39A-I/ST Roving Networks / Microchip Technology	RF TX IC FSK 310/433MHZ 14TSSOP	643
MICRF103BM Roving Networks / Microchip Technology	QWIKRADIO UHF ASK TRANSMITTER	5716
MICRF112YMU-TR Roving Networks / Microchip Technology	RF TX IC ASK 300-450MHZ 10XFDFN	0
PIC12F529T39A-I/ST Roving Networks / Microchip Technology	RF TX IC FSK 310/433MHZ 14TSSOP	41
ATA8401C-6AQY-66 Roving Networks / Microchip Technology	RF TX IC UHF 300-350MHZ 8TSSOP	4979
ATA8741C-PXQW-1 Roving Networks / Microchip Technology	RF XMITTER UHF 310-350MHZ 24VQFN	5910
ATA5756C-6DQY-66 Roving Networks / Microchip Technology	RF TX IC ASK/FSK 315MHZ 10TFSOP	4993
PIC12F529T39AT-I/ST Roving Networks / Microchip Technology	RF TX IC FSK 310/433MHZ 14TSSOP	2467
ATA8404C-6DQY-66 Roving Networks / Microchip Technology	RF TX IC ASK 313-317MHZ 10TFSOP	9899
MICRF103YM Roving Networks / Microchip Technology	QWIKRADIO UHF ASK TRANSMITTER	4789
ATA8520-GHQW Roving Networks / Microchip Technology	RF TRANSMITTER 868MHZ 32VFQFN	0
ATA8743C-PXQW-1 Roving Networks / Microchip Technology	RF XMITTER UHF 868-928MHZ 24VQFN	5971
ATA6286C-PNQW-1 Roving Networks / Microchip Technology	RF XMITTER UHF 433MHZ 32VFQFN	7
PIC12LF1840T39AT-I/ST Roving Networks / Microchip Technology	RF TX IC FSK 310/433MHZ 14TSSOP	2495
MICRF112YMM-TR Roving Networks / Microchip Technology	RF TX IC ASK 300-450MHZ 10TFSOP	7427

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