CAJ | 학술논문

在汽车钥匙高频通信的硬件电路设计中，由于其工艺结构的限制，钥匙端的发射天线普遍采用印刷电路板（PCB）环形天线，这种小型天线最大的缺点是效率低且 Q 值高。为解决这种天线所带来的钥匙与车身基站通信的距离短和不稳定性问题，通过对射频系统的相关理论和 PCB 环形天线分析介绍，结合实际 PCB 环形天线的仿真结果给出了一种硬件电路匹配模型，有效地提高了钥匙高频通信的发射功率和高次谐波抑制能力。同时考虑到钥匙与车身的高频通信稳定性，提出了降低匹配网络节点品质因素 Qn 的设计方法，并且利用仿真数据发现此种方法能够有效减少网络器件误差对通信距离的影响。
재기차약시고빈통신적경건전로설계중，유우기공예결구적한제，약시단적발사천선보편채용인쇄전로판（PCB）배형천선，저충소형천선최대적결점시효솔저차 Q 치고。위해결저충천선소대래적약시여차신기참통신적거리단화불은정성문제，통과대사빈계통적상관이론화 PCB 배형천선분석개소，결합실제 PCB 배형천선적방진결과급출료일충경건전로필배모형，유효지제고료약시고빈통신적발사공솔화고차해파억제능력。동시고필도약시여차신적고빈통신은정성，제출료강저필배망락절점품질인소 Qn 적설계방법，병차이용방진수거발현차충방법능구유효감소망락기건오차대통신거리적영향。
Because of the limit of car?key’s process structure,the radio antenna of keys are designed to PCB loop antenna in the circuit design of car?keys high frequency communication,the biggest weakness of which is poor efficiency and high Q?factor.To solve the problem such as short range and instability in communication between key and car,based on introduction of related theory of RF system and PCB loop antenna,this paper presents a hardware circuit matching model combined with the simulation of PCB loop antenna,which improves effectively the transmitting power and harmonic suppression capability of the key high?frequency communication.Considering the stability of high?frequency communication between key and car,this paper proposes a design solution which reduces the nodal quali?ty factor?Qn and is an effective method to reduce the influence of the error of network devices on communication distance with the simu?lation data.