摘要
为解决RFID低功耗、小体积的问题,提出了一种新的RFID射频前端振荡器的设计方法。分析了晶体管稳定性的变化规律,提出了采用晶体管和无源网络产生振荡的方法,在增加正反馈使反射系数最佳的情况下给出了振荡器的电路结构。对射频振荡器进行仿真,结果表明,调谐网络和终端网络对振荡器的性能有影响,反射系数增大可缩短起振时间,调谐网络电阻增大将加大噪声,可以综合利用史密斯圆图和复平面上的稳定性边界有效分配性能指标。研究结果为RFID在低复杂度下改善振荡器的性能提出了一种新的途径。
A new design method for RFID oscillator at RF front end is proposed to implement the low power con- sumption and small size. The variation regular of transistor stability is analysed, the oscillator made up of transis- tor and passive network is proposed, and the circuit structure is given which increases positive feedback to imple- ment the best reflection coefficient. Based on RFID the oscillator is simulated and the results show that the per- formance is affected by both tuning network and terminal network, the increased reflection coefficient will de- crease oscillator starting time, the increase in resistance of the tuning network will increase noise, the Smith chart and stability boundary can effectively allocate parameters. The research results propose a new method of improv- ing oscillator under low complexity.
出处
《电讯技术》
北大核心
2012年第8期1324-1328,共5页
Telecommunication Engineering
基金
陕西省教育厅专项科研计划基金资助项目(11JK1022)
西安邮电大学基金资助项目(KJA201103)~~
