The schematic of the power supply circuit shown in Figure 4

these high-frequency components can easily through the power supply to enter the communication system. Further the transmission frequency of the system itself will be fed back through the power sensor to the communication system to cause interference. The 220μH the thus can be added in the power circuit inductors, laptop battery and incorporated into a plurality of different capacitance values ??of the capacitance constituted by a filter circuit to suppress a variety of frequency signals. The concentrator can be stable and reliable power supply and low interference to ensure its reliable operation. The schematic of the power supply circuit shown in Figure 4.

The RF part of the circuit design is the key to the success of important and difficult, but also designed concentrator concentrator design. Anti-jamming design is directly related to the RF performance and operation of the concentrator. The wiring of the RF part, reasonable layout and wiring, and an effective means of both multilayer wiring must also reduce electromagnetic interference to improve the anti-jamming capability.More importantly, nRF2401 cheaper than Bluetooth products. So nRF2401 is the industry's smallest and least power consumption, low-cost RF system-on-chip peripheral components at least.

Wiring need to pay attention to the following points: First, the RF part of the circuit is not used as wiring area must be filled with copper connected to ground, notebook batteries to provide RF shielding to achieve an effective anti-jamming; nRF2401 chip at the bottom should be grounded; In order to reduce delays, reduce crosstalk, and ensure that the high-frequency signal transmission, and you want to use multiple ground vias to minimize crosstalk reduce the impact of the distribution parameters, the device should be distributed nRF2401 nRF2401 chip bottom and stratigraphic connected in; around, and use of a smaller package.

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