RF Modules

What is a RF Module?
A RF Module is commonly referred to as a “radio frequency” module, it is a small electronic device that is used to transmit and receive radio signals between two devices. A RF Module is usually used with a pair of encoder/decoders. The encoder is used for encoding parallel data for transmitting whilst the reception is decoded by a decoder.

What is the main function of a RF Module?
Radio frequency modules are the biggest facilitator of wireless communication, this is because it does not require a line of sight. This is in contrast to its usual alternative, Infrared, which mostly operates in line of sight mode. It spans between a range of 3 KHz and 300 GHz, with the lower end being applied in applications such as submarines and radio stations whilst the higher spectrum is used in applications such as GPS, Wi-Fi, Bluetooth and TV broadcasting. Some of the main functions of a RF Module are:
• Act as a transmitter of signals
• A solution for detecting radio signals
• Bridging communication between two devices
• RF can stretch communication between applications
• Acts as a receiver module
• Acts as a transmitter

Did you know?
The performance of radio frequency applications is dependent on a few factors.
• Through increasing a transmitter’s power, a larger communication range can be attained. This also causes a power drain from the power source which could result in a shorter life span for battery powered devices.
• Through the use of higher transmitted power, an interference with other radio frequencies can occur.

Typical Applications of a RF Module
• Car alarm systems
• Remote controls
• Sensor reporting
• Automation systems

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Description Price Module Type Supported Frequency Bands Modulation Technique Maximum RF Data Rate Maximum Output Power Receiver Sensitivity Supported Bus Interfaces Supply Voltage Dimensions Height Length Maximum Operating Temperature Minimum Operating Temperature Width
RS Stock No. 657-1362
Mfr. Part No.QFM-RX1-433
Receiver 433MHz FM 4800bit/s - -106dBm - 4.5 → 5.5V 13 x 44.2 x 5.5mm 5.5mm 44.2mm +85 °C -20 °C 13mm
RS Stock No. 617-1811
Mfr. Part No.QAM-TX3
Transmitter 433.92MHz - 3000Hz +10dBm - - 3 → 12V 5.2 x 7.08 x 1.8mm 1.8mm 7.08mm +85 °C -20 °C 5.2mm
RS Stock No. 762-0106
Mfr. Part No.ZANDER-S4
Transceiver - - - - - - - - - - - - -
RS Stock No. 385-487
Mfr. Part No.QFM-TX1-433
Transmitter 433MHz FM 4.8kbit/s +10dBm - - 2.2 → 3.5V 12.501 x 16.802 x 2.5mm 2.5mm 16.802mm +85 °C -20 °C 12.501mm