RF Modules

An RF module, also commonly referred to as a radio frequency module, is a small electronic device that is used to transmit and receive radio signals between two devices, and is also used in embedded systems to facilitate wireless communication connections. RS Components offer a varied range of RF modules from several brands across the industry, including Eccel Technology, ON Semiconductor, RF Solutions, Wurth Elektronik, and many more.

What is the main function of an 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. An RF module is typically 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. Some of the main functions of an 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

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, interference with other radio frequencies can occur.

Typical applications of an RF module

  • Car alarm systems
  • Remote controls
  • Sensor reporting
  • Automation systems

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Description Price Component Type Module Type Supported Frequency Bands Modulation Technique Maximum RF Data Rate Maximum Output Power Mounting Type Receiver Sensitivity Supported Bus Interfaces Supply Voltage Dimensions Height Length Maximum Operating Temperature
RS Stock No. 715-4078
Mfr. Part No.CARD-ICODE
SGD4.19
Each
units
Module - - - - - - - - - - - - -
RS Stock No. 666-6744
Mfr. Part No.ALPHA-TX433S
SGD8.58
Each
units
Module - 433MHz FM 256kbit/s +7dBm - -109dBm SPI 2.2 → 5.4V 16.1 x 15.9 x 4.2mm 4.2mm 16.1mm +85 °C
RS Stock No. 666-6757
Mfr. Part No.ALPHA-TRX433S
SGD12.94
Each
units
Module - 433MHz FM 115.2kbit/s +25dBm - - SPI 2.2 → 3.8V 16.1 x 15.9 x 4.2mm 4.2mm 16.1mm +85 °C
RS Stock No. 542-517
Mfr. Part No.RWD-MIFARE-OEM
SGD125.61
Each
units
Module - - - - - - - TTL 5V - - - -
RS Stock No. 672-9003
Mfr. Part No.ALPHA-TR868S
SGD9.36
Each
units
Module - 868MHz FM 115200bit/s - - - SPI 2.2 → 3.8V - - - +85 °C
RS Stock No. 793-4395
Mfr. Part No.T9-434-075
SGD37.80
Each
units
Module - 434MHz FM 57kbit/s +13dBm - -121dBm Serial 2.2 → 12V 3 x 31.5 x 10.5mm 10.5mm 31.5mm +55 °C
RS Stock No. 704-3278
Mfr. Part No.RDF1
SGD29.65
Each
units
Module - 433.92MHz FM - - - -103dBm - 4.5 → 5.5V - - 50.5mm +60 °C
RS Stock No. 125-8208
Mfr. Part No.QAM-RX10-433
SGD5.91
Each
units
Module - - - - - - - - 5V - - - -
RS Stock No. 672-9016
Mfr. Part No.SMARTALPHA-RX868
SGD27.86
Each
units
Module - 868MHz GFSK 86.2kbit/s 0dBm - -110dBm USB 2.3 → 3.6V - - 23.7mm +80 °C
RS Stock No. 125-1246
Mfr. Part No.ZETAPLUS-868-SO
SGD20.69
Each
units
Module - 868MHz FM 500kbit/s +13dBm - -116dBm Serial 1.8 → 3.6V 16 x 16.5 x 1mm 1mm 16.5mm +85 °C
RS Stock No. 125-1244
Mfr. Part No.ZETAPLUS-433-SO
SGD19.39
Each
units
Module - 433MHz FM 500kbit/s +13dBm - -116dBm Serial 1.8 → 3.6V 16 x 16.5 x 1mm 1mm 16.5mm +85 °C
RS Stock No. 125-1257
Mfr. Part No.RFM119W-868S1
SGD9.39
Each
units
Module - 868MHz FSK - +13dBm - - 2-Wire 3.6V 16 x 16 x 4.9mm 4.9mm 16mm +85 °C
RS Stock No. 672-9053
Mfr. Part No.CARD-MIFARE4K
SGD8.26
Each
units
Module - - - - - - - - - - - - -
RS Stock No. 761-9878
Mfr. Part No.ZULU-M868
SGD40.05
Each
units
Module - 868MHz FSK 256kbit/s +20dBm - -116dBm - 2.2 → 3.6V 11 x 25 x 1mm 1mm 25mm +85 °C
RS Stock No. 122-5257
Mfr. Part No.ZETA-433-D
SGD18.29
Each
units
Module - 433MHz FM 500kbit/s +13dBm - -116dBm SPI 1.8 → 3.6V 16 x 16.5 x 2mm 2mm 16.5mm +85 °C
RS Stock No. 111-0160
Mfr. Part No.KAPPA-M868-SO
SGD29.03
Each
units
Module - 868MHz FM 57.6kbit/s +13dBm - -102dBm RS232 2.4 → 3.6V 31.5 x 11 x 2.5mm 2.5mm 31.5mm +85 °C
RS Stock No. 125-1247
Mfr. Part No.ZETAPLUS-868-D
SGD21.05
Each
units
Module - 868MHz FM 500kbit/s +13dBm - -116dBm Serial 1.8 → 3.6V 16 x 16.5 x 1mm 1mm 16.5mm +85 °C
RS Stock No. 505-6761
Mfr. Part No.R7G-434.225
SGD65.35
Each
units
Module - 434MHz FM 20kbit/s - - -117dBm - 4.5 → 5.5V 48 x 8.3 x 17mm 17mm 48mm +55 °C
RS Stock No. 762-0125
Mfr. Part No.ZULUEVAL-M
SGD176.30
Each
units
Module - 868MHz FSK 256kbit/s +20dBm - -116dBm - 2.2 → 3.6V 11 x 25 x 1mm 1mm 25mm +85 °C
RS Stock No. 505-6799
Mfr. Part No.R7G-434.525
SGD55.70
Each
units
Module - 434MHz FM 20kbit/s - - -117dBm - 4.5 → 5.5V 48 x 8.3 x 17mm 17mm 48mm +55 °C