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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

Active Publication Date: 2017-03-15
CHENGDU QIANJIA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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, switch circuit, clock circuit and Wireless Spread Spectrum Chip

Method used

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  • Gas meter wireless spread spectrum transceiver system and its pcb layout structure
  • Gas meter wireless spread spectrum transceiver system and its pcb layout structure
  • Gas meter wireless spread spectrum transceiver system and its pcb layout structure

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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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Abstract

The invention relates to the design field of radio-frequency circuits, and particularly relates to an improved gas meter wireless spread spectrum transceiving system and a printed circuit board (PCB) layout structure thereof. In the improved gas meter wireless spread spectrum transceiving system, an output impedance matching circuit is arranged between an output end of a wireless spread spectrum chip and a switch circuit, and an input impedance matching circuit and a low noise amplifier circuit are arranged between an input end of the wireless spread spectrum chip and the switch circuit. Through arrangement of the input impedance matching circuit and the output impedance matching circuit, matching of impedances of an input link and an output link is guaranteed, the low noise amplifier (LNA) circuit is arranged in a receiving link, so that the communication distance is lengthened by times when a module has the same transmitting power; in addition, the PCB layout structure provided by the invention adopts a four-layer layout manner, all components and parts are arranged on the same layer of the PCB so as to form an integral unified reference ground, so that the stability of the wireless spread spectrum transceiving system is further improved.

Description

technical field [0001] The invention relates to the field of radio frequency circuit design, in particular to a gas meter wireless spread spectrum transceiver system and its PCB layout structure. Background technique [0002] In the field of gas meter wireless transceiver modules, the wireless transceiver modules basically use traditional modulation methods for data communication, but the current gas meter wireless transceiver modules are prone to a series of problems such as poor anti-interference performance and weak confidentiality in practical applications. , resulting in poor communication quality. [0003] In addition, in the currently commonly used wireless transceiver modules, the design method of two-layer boards is mostly adopted, which inevitably requires some traces to separate the layers of the two-layer boards, resulting in the inability to form a complete reference ground, so The wireless transceiver module adopting this design method is extremely unstable du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/40H04B1/69
Inventor 程体飞赵勇胡芸华
Owner CHENGDU QIANJIA TECH CO LTD
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