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Communication devices (Industrial Communication Device, ICommunication devices (Industrial Communication Device, I general name of communication equipment installed- Full-duplex: Home telephones (landlines), mobile phones, computers, modems, radios, satellite phones (maritime phones), etc.
Broadly speaking: Televisions, radios, satellite signal transmitters and receivers, various wireless industrial/building control systems, radar, sonar, etc., all contain communication circuit modules.
WiFi represents Wireless Fidelity, a short-range wireless technology used in offices and homes. It operates in the frequency band near 2.4GHz, which is currently an unlicensed wireless band. WiFi communication devices follow the IEEE 802.11 standard, with widely used standards including: 802.11a, 802.11b, 802.11g, 802.11n. So-called WiFi communication devices should be those that support this technology.
Electromagnetic Waves
The theory of electromagnetic waves was established by Maxwell. Marconi, an Italian, invented telegraph communication equipment based on electromagnetic waves, while Bell invented the telephone.
Wireless communication uses radio waves instead of cables to achieve communication between devices. This method has the advantages of quick installation and maintenance, simplicity, independence from terrain and environmental conditions at the site, and low cost. A rich variety of products can meet users’ needs in terms of communication distance and speed requirements.
Wireless communication devices: ASK modulators, used for modulating carriers with data signals via ASK; QPSK modulators, used for modulating carriers with I and Q signals via QPSK. In wireless communication devices with both ASK and QPSK modulation capabilities, the manufacturing cost of components is low, the size is not large, and one output end of the QPSK modulator is connected to the carrier input end of the ASK modulator through a switch. Furthermore, the antenna is connected to the output end of the ASK modulator through a switch. În plus, a mixer is placed between the switches. The switch connects the QPSK modulator and ASK modulator during transmission, and connects the QPSK modulator and mixer during reception. During transmission, the switch connects the ASK modulator to the antenna, and during reception, it connects the antenna to the mixer. Thus, during transmission, either ASK or QPSK modulated waves are output using the ASK modulator and QPSK modulator. During reception, the QPSK modulator outputs a sine wave, and the data signal is down-converted, demodulated or detected by the mixer.
UGPCB can provide PCB assembly services for communication devices upon request. Our products offer good performance and fast delivery times. Inquiries are welcome.
