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Explain how the RF wireless transceiver module works

271 Published by xia, Crystal Jan 26,2019

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The RF wireless transceiver module can be used for transmission of wireless data. Wireless data 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 protection systems, wireless remote control systems, biosignal acquisition, hydrometeorological monitoring, robot control, wireless 232 data communication, wireless 485/422 data communication, digital audio, digital image transmission, etc.

rf wireless transceiver module size.

With the rapid development of electronic information technology, more and more communication products have emerged, especially in the field of wireless communication, which is even more dazzling. At present, antenna communication methods include radio, infrared, microwave, etc., and there are many modules available.

The transmitting module does not have a coding integrated circuit, but a data modulation transistor Q1 is added. This structure makes it easy to interface with other fixed coding circuits, rolling code circuits and single-chip microcomputers without regard to the operating voltage and output amplitude of the coding circuit. The size of the signal value. For example, when using a coded integrated circuit such as PT2262 or SM5262, connect the data output terminal pin 17 to the input terminal of the data module.

The data module has a wide operating voltage range of 3 to 12V. When the voltage changes, the transmitting frequency is basically unchanged, and the receiving module matched with the transmitting module can receive stably without any adjustment. When the emission voltage is 3V, the transmission distance is about 20~50 meters, and the transmission power is small. When the voltage is 5V, it is about 100~200 meters. When the voltage is 9V, it is about 300~500 meters. When the emission voltage is 12V, it is the best working voltage that has a good emission effect, the emission current is about 60 mA, the transmission distance is 700-800 meters, and the transmission power is about 500 milliwatts. When the voltage is greater than l2V, the power consumption increases, and the effective transmission power is no longer significantly improved. The feature of this module is that the transmission power is relatively large and the transmission distance is relatively long, which is more suitable for communication under severe conditions. The antenna is preferably a 25-cm-long wire. It is best to erect when transmitting over long distances. Because radio signals are transmitted by many factors, the practical distance is only half or less of the nominal distance. That should be note.

RF wireless transceiver module application.

The data module is modulated by ASK mode to reduce power consumption. When the data signal stops, the emission current drops to zero. The data signal and the input end of the transmitting module can be connected by resistor or directly without capacitive coupling, otherwise the transmitting module will not work normally. The data level should be close to the actual operating voltage of the data module to achieve a higher modulation effect.

The wireless receiving module has an operating voltage of 5 volts and a quiescent current of 4 mA. It is a super regenerative receiving circuit with a receiving sensitivity of -105 dbm and a receiving antenna of preferably 25 to 30 cm. It is preferably erected. The receiving module itself does not have a decoding integrated circuit, so the receiving circuit is only a component, and the application can only play its due role in the secondary development of the specific circuit. This design has many advantages, and it can be combined with various decoding circuits or single-chip microcomputers,and the design of the circuit is flexible and convenient.

Shenzhen Yaoertai Technology Co., Ltd. is specialized in RF wireless transceiver module, wireless remote control, wireless receiver, wireless controller, infrared detector, door magnet, smoke detector, gas alarm, burglar alarm, etc. A high-tech enterprise that develops, manufactures and sells related products. Wireless controller accessory products are widely used in remote control electric windows and doors, retractable doors, garage doors; remote control lights, switches, communications and security. Professional supporting garage door factory, GPS factory, security factory, electric control lock factory, automobile factory, electric door and window, gateway, industrial control, etc. Welcome everyone to come to consult!

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