![]() RF transmitters are usually subject to regulatory requirements which dictate the maximum allowable transmitter power output, harmonics, and band edge requirements.Īn RF receiver module receives the modulated RF signal, and demodulates it. Transmitter modules are usually implemented alongside a microcontroller which will provide data to the module which can be transmitted. Most standard, well known types are covered here:Īn RF transmitter module is a small PCB sub-assembly capable of transmitting a radio wave and modulating that wave to carry data. RF modules typically incorporate a printed circuit board, transmit or receive circuit, antenna, and serial interface for communication to the host processor. It can also be applied to modules across a huge variation of functionality and capability. The term RF module can be applied to many different types, shapes and sizes of small electronic sub assembly circuit board. RF modules may comply with a defined protocol for RF communications such as Zigbee, Bluetooth Low Energy, or Wi-Fi, or they may implement a proprietary protocol. Short Range Devices may also use frequencies available for unlicensed such as 315 MHz and 868 MHz. These frequencies are used because of national and international regulations governing the used of radio for communication. Several carrier frequencies are commonly used in commercially available RF modules, including those in the industrial, scientific and medical (ISM) radio bands such as 433.92 MHz, 915 MHz, and 2400 MHz. They are sometimes used to replace older infrared communication designs as they have the advantage of not requiring line-of-sight operation. RF modules are most often used in medium and low volume products for consumer applications such as garage door openers, wireless alarm or monitoring systems, industrial remote controls, smart sensor applications, and wireless home automation systems. For these reasons, design engineers will often design a circuit for an application which requires radio communication and then "drop in" a pre-made radio module rather than attempt a discrete design, saving time and money on development. Finally, radio circuits are usually subject to limits on radiated emissions, and require Conformance testing and certification by a standardization organization such as ETSI or the U.S. In addition, reliable RF communication circuit requires careful monitoring of the manufacturing process to ensure that the RF performance is not adversely affected. Good electronic radio design is notoriously complex because of the sensitivity of radio circuits and the accuracy of components and layouts required to achieve operation on a specific frequency. RF modules are widely used in electronic design owing to the difficulty of designing radio circuitry. ![]() RF modules are typically fabricated using RF CMOS technology. RF communications incorporate a transmitter and a receiver. For many applications, the medium of choice is RF since it does not require line of sight. This wireless communication may be accomplished through optical communication or through radio-frequency (RF) communication. In an embedded system it is often desirable to communicate with another device wirelessly. ![]() RF module (with a ruler for size reference)Īn RF module (short for radio-frequency module) is a (usually) small electronic device used to transmit and/or receive radio signals between two devices. ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |