1) Microwave frequency band
微波频段
2) microwave and millimeter wave X/Ku/Ka band
微波毫米波X/Ku/Ka频段
3) X-band Microwave Doubler
X波段微波倍频器
1.
This thesis is mainly on “The Research and Design of X-band Microwave Doubler and DDS+PLL Microwave Frequency Source”, The doubler converts 100MHz to 9600MHz step by step, DDS( Direct Digital Synthesis) produces all kind of signals, these signals mix with the signals that comes from the PLL(Phase Locked Loop), by this way, we can gain microwave signals.
本论文研究的课题由两部分构成,X波段微波倍频器的研制与DDS+PLL微波频率源的设计,前者将100MHz输入信号,通过多次倍频输出9600MHz信号,后者是直接数字频率合成DDS产生所需要的各种信号,通过与锁相环PLL环外混频将频率抬高至微波频段。
5) L-band microwave radiometer
L频段微波辐射计
1.
Dynamic characteristics of soil moisture were tested with L-band microwave radiometer.
在实验室条件下,利用L频段微波辐射计测量了土壤湿度动态特性。
6) Dual-Frequency Microwave Radiometer
双频段微波辐射计
1.
An experiment of measuring soil moisture was carried out by using Dual-Frequency Microwave Radiometer designed by the authors.
利用自行研制的双频段微波辐射计进行地基遥感土壤湿度试验,根据试验测得的数据进行回归分析,得到L、C波段反演土壤湿度经验回归模型。
补充资料：频段
1.把无线电波按频率不同而分成的段，例如低频﹑中频﹑高频﹑超高频。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条