毫米波压控振荡器的电路研究与设计

Research and Design of Millimeter Wave Voltage-Controlled Oscillator Circuit

为降低毫米波压控振荡器的功耗,削弱相位噪声影响,提高无线电通信性能,本研究对毫米波压控振荡器的电路进行设计,交叉耦合对的偏置由电源电压VDD提供,保证起振可靠性。同时,本研究在电路设计过程中还采用两组相同的变容二极管并联,进而在保证变容管高Q值的情况下进一步提升频率调谐范围。此外,加入缓冲放大器,隔离电路前后级模块,降低后级模块对电路的影响。最后进行版图设计以及电路后仿真,以期能够通过本次研究,为相关从业人员提供可行性参考。

In order to reduce the power consumption of millimeter wave voltage controlled oscillators,weaken the influence of phase noise,and improve the signal transmission performance of wireless communication systems,this study adopts the Class-B structure to design the circuit of millimeter wave voltage controlled oscillators.The bias of cross coupling is provided by the power supply voltage VDD,ensuring the reliability of startup oscillation.At the same time,in the circuit design process,this study also used two sets of identical varactor in parallel,thereby further improving the frequency tuning range while ensuring the high Q value of the varactor.A buffer amplifier has also been added to isolate the front-end and back-end modules of the circuit,reducing the impact of the back-end modules on the circuit.Finally,layout design and circuit post simulation were carried out in order to provide feasible references for relevant practitioners through this study.