Thursday, September 22, 2022
问题:单选题从广义来讲,产生莫尔斯码的调制方法是()A ASKB FSKC PSKD DAM...
Saturday, November 11, 2023
Wednesday, September 21, 2022
Thursday, September 22, 2022
Sunday, March 10, 2024
Thursday, September 22, 2022
问题:填空题间隔双环天线可分为垂直()式、垂直()式和水平共面式三种 。...
Wednesday, November 29, 2023
问题:计算题:设两个微波站的距离为60km,频率为8G赫兹,计算自由空间的传播衰减。...
Friday, September 16, 2022
问题:单选题选址费、场地租费标准实施动态调整,实际发生费用连续()年同一趋势变化的应调整标准。A 1B 2C 5D 10...
Saturday, December 23, 2023
问题:微波发信机的任务是将被传送的信号对()进行调制,然后用微波频率将信号发射出去。...
Tuesday, September 20, 2022
问题:单选题VHF电磁波的传输距离可达()公里。A 数十B 数百C 数千D 数万...
Thursday, March 16, 2023
问题:若发射端和接收端的天线高度分别为49m和36m,求其最大视距传播距离。...
Monday, September 19, 2022
Thursday, September 22, 2022
问题:多选题地球站天线跟踪卫星时,要进行的指向调节有()A方位B水平C俯仰D垂直...
Friday, February 9, 2024
Thursday, September 22, 2022
问题:在微波通信中共用天线时几乎都采用()集体排列方案。...
Thursday, September 22, 2022
问题:微波波段用的()必须具有低频谐振电路的基本性能,此外波道系统的谐振腔必须封闭,以免辐射。...
Thursday, September 22, 2022
问题:考虑到设备的安装,机房还需要有一定的高度,机房的最低净高一般不低于()米。...
Thursday, September 22, 2022
Sunday, September 18, 2022
问题:无线工作站STA是基于()条件决定是否发起漫游的改变。...
Thursday, September 22, 2022