SLED phase reverse system based on FPGA
-
摘要: 介绍了基于可编程逻辑门阵列(FPGA)的能量倍增器(SLED)相位翻转系统。该系统主要由微波IQ调制器、FPGA和高速DAC组成。在FPGA的控制下,DAC输出两路双极性脉冲电平信号,加载于调制器的IQ端,将微波连续波输入信号转变为4 s脉冲输出信号,并且在3 s时刻微波相位发生180跳变。经测试,相位翻转精度为1802,翻转相位的长期稳定度优于0.5;相位翻转系统驱动的6台SLED的输出功率增益均超过7 dB,最高达到7.54 dB,增益的长期稳定度达到0.1 dB。Abstract: This paper introduces the phase reverse system designed for SLAC Energy Doubler (SLED) based on Field Programmable Gate Array (FPGA). The phase reverse system is composed of a microwave IQ vector modulator, a FPGA board with the high speed DAC unit. Modulated by the DAC output pulse signal, the IQ modulator transforms the RF CW input signal into 4 s pulse output signal, whose phase is reversed to 180 at the moment of 3 s. The test results show that the phase reversal accuracy is about 1802, and the stability is better than 0.5. The RF power gains of six SLEDs are more than 7 dB, the maximum 7.54 dB is achieved. The long-term variation of the power gain is 0.1 dB.
-
Key words:
- linac /
- SLED /
- phase reverse /
- IQ modulator /
- FPGA
点击查看大图
计量
- 文章访问数: 1383
- HTML全文浏览量: 252
- PDF下载量: 401
- 被引次数: 0