Gas meter wireless spread spectrum transceiver system and its pcb layout structure
A wireless spread spectrum, transceiver system technology, applied in the transmission system, electrical components, etc., can solve the problems of poor anti-interference performance and low confidentiality, and achieve the effects of strong anti-fading, extended communication distance, and improved stability
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Embodiment 1
[0023] Embodiment 1: as figure 1 As shown, the purpose of the present invention is to overcome the problems of poor anti-interference performance and low confidentiality of the current gas meter wireless transceiver module, and provide a gas meter wireless spread spectrum transceiver system with strong anti-interference ability, including antenna 5, switch circuit 4. The clock circuit 6 and the wireless spread spectrum chip 1 (the wireless spread spectrum chip in this embodiment adopts the SX1278 wireless spread spectrum chip).
[0024] Such as Figure 4 As shown, in this embodiment, the switch circuit 4 uses a single-pole double-throw chip U2 (in this embodiment, a single-pole double-throw chip UPG2214TK); port, receiving enable port, which are respectively used to receive the transmit enable signal TXEN and the receive enable signal RXEN; the RFCOM port of the SPDT chip U2 is connected to the antenna A1 through the capacitor C14.
[0025] Such as figure 1 , Figure 5 The...
Embodiment 2
[0034] Embodiment 2: In order to overcome the problem that the two-layer board design method adopted in the current wireless transceiver module causes some traces to separate the ground layers of the two-layer board and cause different reference standards of radio frequency signals, the present invention also provides a For those with strong anti-interference ability, apply the PCB layout structure of the gas meter wireless spread spectrum transceiver system as described above, including the first version layer, the second version layer, the third version layer and the fourth version layer; the first version layer , the second version of the layer, the third version of the layer and the fourth version of the layer are connected through via holes; the first version of the layer is a wireless spread spectrum transceiver system circuit layer, and all components are arranged on the first version of the layer, which can be Effectively reduce the number of vias; the second layer is t...
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