【摘要】 罗兰C是一种陆基、低频、脉冲相位导航体制的中远程精密无线电导航系统。其工作频率是100 kHz。设计一款应用于罗兰接收机的有源接收磁天线,天线极化方式是垂直极化,通过磁天线接收90~110 kHz电磁波信号。有源电路设计分为带通滤波器设计、低噪声放大器设计、加法器电路设计。带通滤波器的频带为90~110 kHz;低噪声放大器增益为20 d B;加法器电路是将4个磁天线信号进行合成,保障天线能全向接收。有源电路芯片是双电源供电,为使用方便要进行单电源转双电源电路设计。最后将磁天线接收的信号经过滤波、低噪声放大,再滤波、四路磁天线合成的信号输出,达到设计要求。更多还原

【Abstract】 Roland C is a long-range precision radio navigation system,which characterized by landbased,low-frequency and pulse-phase navigation system. Its operating frequency is 100 kHz. Design an active receive magnetic antenna for the Roland receiver,to receive 90~110 kHz electromagnetic wave signal based on an active magnetic antenna and the vertical antenna polarization. Active circuit design is divided into band-pass filter design,low noise amplifier design and adder circuit design. Bandpass filter is 90~110 kHz;low noise amplifier gain of 20 d B;adder circuit is the four magnetic antenna signal synthesis,all are to ensure the antenna can be omnidirectional to receive. For easy using,it is necessary to transfer a single power to dual power supply circuit design,because active circuit chip is a dual power supply. Finally,the magnetic antenna receive the signal through the filter,low noise amplification,and then filter,four magnetic antenna synthesis of the signal output,to meet the design requirements.更多还原