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Radio Frequency (RF) signals PCB Manufacturer, 2.4GHz WiFi and Bluetooth RF PCBA Turnkey services

  • Radio Frequency (RF) signals refer to high-frequency alternating electromagnetic signals with frequencies between 300kHz and 30GHz that can be radiated or received by antennas. RF circuits are primarily responsible for signal filtering, power amplification, frequency conversion, and modulation/demodulation, and are core components of wireless communications, radar, navigation, and other systems. Radio Frequency Integrated Circuits (RFICs) are RF circuits implemented using integrated circuit technology and typically include modules such as low-noise amplifiers, filters, mixers, frequency synthesizers, and power amplifiers.

    This WiFi PCB module uses the AP6212, integrating 2.4GHz WiFi and Bluetooth 4.2. Key design points:

    1. The Y1 crystal circuit should be placed on the same layer as the chip and as close as possible to avoid vias. Keep the crystal traces as short as possible and away from interference sources.

    2. The core board provides a 768kHz clock frequency for the Wi-Fi. This signal requires ground protection. A GND via should be added every 400mil.

    3. No traces are allowed on the top layer beneath the module; the reference plane must be a complete ground plane.

    4. All SDIO signals must maintain PCB impedance control, with a single-ended signal impedance of 50Ω ±10%.

    5. Antenna port traces must be 50Ω. Ensure a complete reference ground with no sudden impedance changes. No other signal lines or power supplies are allowed underneath. The accompanying ground for these traces must be connected to the main ground reference plane using a ground wall.

    An RF IC (Integrated Circuit) is an integrated circuit chip that operates in the RF frequency band, implementing specific RF functions within a narrow frequency band. RF chips are analog chips (GPUs, CPUs, etc. are digital chips) and are considered the crown jewels of analog chips.

    A Wi-Fi chip is an embedded Wi-Fi module. The main control chip is typically a simple single-bit microcontroller with built-in Wi-Fi drivers and protocols. Its interface is a standard MCU interface, such as a UART. Wi-Fi chips are commonly used in various smart homes or smart hardware, such as TVs, air conditioners, refrigerators, etc. with Wi-Fi functions.
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