WLM400

Serial Interfaces:	Ethernet, I²C, SPI, UART, USB
Package / Case:	Module
Operating Temperature:	-20°C ~ 70°C
Mounting Type:	Surface Mount
Current - Transmitting:	--
Current - Receiving:	--
Voltage - Supply:	3 V ~ 5.5 V
Memory Size:	--
Utilized IC / Part:	8686
Antenna Type:	Not Included, U.FL
Series:	--
Sensitivity:	-91dBm
Power - Output:	17dBm
Data Rate:	54Mbps
Frequency:	2.4GHz
Modulation:	16QAM, 64QAM, BPSK, CCK, DSSS, OFDM, QPSK
Protocol:	802.11b/g
RF Family/Standard:	WiFi
Part Status:	Obsolete
Packaging:	Bulk

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RF Transceiver Modules

The WLM400 is a type of radio frequency (RF) transceiver module. This type of module is designed to allow radio signals to be sent, received, and amplified in order to improve signal quality. It is used in various applications including mobile communications, wireless networking, and smart home automation systems.

WLM400 Application Field

The WLM400 is typically used in intermittent radio applications where transmissions are brief and need to perform well in an unpredictable environment. Examples of WLM400 applications include remote controls, security and surveillance systems, consumer electronics, wireless toys, GPS, and automotive applications. It is also used for home automation, allowing users to control various devices in their home remotely such as lights, appliance, door locks, and security systems.

WLM400 Working Principle

The WLM400 operates using two main components—the base-band processor and the transceiver. The base-band processor is responsible for encoding and decoding the signals, while the transceiver is responsible for transmitting and receiving the signals. The WLM400 is based on direct-conversion radio frequency technology, meaning it can transmit and receive any frequency without the need for external components.When transmitting, the base-band processor converts the digital source signals into an analog radio signal, which is then amplified and sent out through the antenna. When receiving, the antenna captures the radio signal, which is then amplified and converted back to a digital signal by the base-band processor.The WLM400 also supports dual-antenna diversity, which helps to reduce fading effects and to ensure signal quality. This is accomplished by employing two antennas with different radiation patterns which help to minimize the effect of multipath propagation on the RF signal.

Conclusion

The WLM400 is a versatile RF transceiver module that can be used in a variety of applications. Its direct-conversion technology allows it to operate at any frequency without external components, and its dual-antenna diversity helps improve signal quality. While designed for intermittent applications, its features make it suitable for many different types of radio devices.

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