What Is an HF Transceiver?

RF transceiver, RF for short RF is the radio frequency current, it is a short for high frequency AC change electromagnetic wave. Alternating current that changes less than 1,000 times per second is called low-frequency current, and high-frequency current is greater than 10,000 times, and radio frequency is such a high-frequency current. The cable television system uses radio frequency transmission.

RF transceiver

RF transceiver, RF for short RF is the radio frequency current, it is a short for high frequency AC change electromagnetic wave. Alternating current that changes less than 1,000 times per second is called low-frequency current, and high-frequency current is greater than 10,000 times, and radio frequency is such a high-frequency current. The cable television system uses radio frequency transmission.

In electronics theory, a current flows through a conductor, and a magnetic field is formed around the conductor; an alternating current passes through the conductor, and an alternating electromagnetic field is formed around the conductor, called an electromagnetic wave.

When the frequency of electromagnetic waves is lower than 100kHz, the electromagnetic waves will be absorbed by the ground surface, which will not form an effective transmission. , We call high-frequency electromagnetic waves with long-distance transmission capabilities radio frequency, English abbreviation: RF

Chinese name

RF transceiver

Operating Voltage

2.2V-3.8V

Scope of application

Medical applications

Special color

Automatic frequency control

RF transceiver transmission is widely used in vehicle monitoring, remote control, telemetry, small wireless networks, wireless meter reading, access control systems, cell paging, industrial data acquisition systems, wireless tags, identification, contactless RF smart cards, small wireless data terminals, Security fire prevention system, wireless remote control system, biological signal acquisition, hydrometeorological monitoring, robot control, wireless 232 data communication, wireless 485/422 data communication, digital audio, digital image transmission and other fields.

MRF49XA is a fully integrated sub-GHzRF transceiver that supports the 434/868 / 915MHz ISM band and FSK modulation and FHSS capabilities.

The MRF49XA is ideal for two-way short-range wireless applications and is easy to integrate with 8, 16, or 32-bit PIC & reg; microcontrollers. The PICtail / PICtail Plus daughter board on the MRF49XA RF transceiver is easy to integrate. 8-bit PIC18Explorer and 16 / 32-bit Explorer 16 development modular microcontroller development boards are also available.

· Fully integrated sub-GHz transceiver

Supports dedicated sub-GHz wireless protocols

· Compatible 4-Wire Serial Peripheral Interface (SPI)

· CMOS / TTL compatible I / O interface

Clock and reset signals for microcontrollers

Integrated 10 MHz oscillator circuit

Integrated low battery voltage detector

Support energy saving mode

· Working voltage: 2.2V-3.8V

· Low current consumption, typical current values are as follows:

-Receive (RX) mode: 11 mA

-Transmit (TX) mode: 15 mA

-Sleep mode: 0.3 mA

· Industrial temperature range

16-lead TSSOP package

RF Transceiver Analog Function

· Support ISM band sub-GHz frequency range (433, 868 and 915 MHz)

Modulation technology: FSK with FHSS function

· Supports high-speed data transfer rates:

Up to 115.2 kbps in digital mode

Up to 256 kbps in analog mode

· Differential RF input / output:

-110dBm typical sensitivity, maximum input level is 0 dBm, typical transmit output power of + 7dBm

· High-resolution programmable PLL frequency synthesizer

· Integrated power amplifier

Integrated low phase noise VCO frequency

Frequency synthesizer and PLL loop filter

· Automatic frequency control

RF transceiver baseband characteristics

Support programmable transmit frequency deviation and receive baseband bandwidth

Digital and analog RSSI output with dynamic range

Receiving synchronization pattern recognition

16-bit receive data FIFO

· Two 8-bit transmit data registers

Low-power duty cycle mode

Advanced adjacent channel rejection / blocking capability

Internal data and clock recovery

Support data filtering

Data quality indicator

RF transceiver typical application

· Home / Industrial Automation

· remote control

· Wireless PC peripherals

Remote keyless entry

Automotive sensor monitoring

Telemetry system

Data recording system

· Remote automatic meter reading

Security systems for home / industrial environments

· Car anti-theft system

· Motion and performance monitoring

· Wireless toy control

· Medical applications ^[2]