【摘要】 根据微带线的基本理论,利用高频结构仿真软件HFSS,考虑到微带电路结构参数的影响,对微带线的信号传输系数及相位延迟进行了详细的分析。分析了RFID阅读器射频电路单元中四通道解调技术。设计制作了工作频率为915 MHz、应用于RFID阅读器的射频移相电路,电路的性能指标符合设计的要求。更多还原

【Abstract】 Based on basic concepts and design equations for microstrip lines,taking into account the impacts of the structural parameters of a microstrip phase-shift circuit,the scattering parameter S21(the transmission coefficients)and the phase delay of the circuit are discussed in detail by using Ansoft_HFSS.The technology of four-channel homodyne intermediate frequency demodulation of RFID reader is discussed.A RF passive microstrip phase-shift circuit of RFID reader operates at the 915 MHz is developed;the performance of this circuit meets the design requirements.更多还原