小型化低成本频率源设计

本文采用集成式锁相环(Phase-Locked Loop，PLL)ADF5355 实现一款超宽带、小尺寸、低成本的频率源，锁相环利用单片机 C8051F340 控制。首先锁相环芯片 ADF5355 可以实现 54 MHz~13600 MHz 的频率输出，可以满足较大频率范围固定点频源的要求；另外，选择的锁相环芯片 ADF5355 和单片机 C8051F340，再加一个稳压器芯片就可以实现低成本频率源的设计； 通过合理的空间布局，可以实现小尺寸频率源的设计，具有较大的工程应用价值。

Design Miniaturized and Low Cost Fixed Frequency Source

This paper design a fixed frequency source with the phase-locked loop chip ADF5355. Controlled by MCU C8051F340, the source realized the goal of miniaturized, low cost and ultra wideband. First, the phase-locked loop chip ADF5355 can realize frequency range from 54 MHz to 13600 MHz, so it can fulfill the request of the frequency range of the fixed frequency source. In addition, this source is formed by the PLL chip ADF5355, MCU C8051F340 and a LDO (Low dropout regulator) chip. Through reasonable PCB design, the size of this source is 30mm×30mm, with great practical value in engineering.