频段

• General specification of c - band low noise amplifier module at normal tempereture for satellite communication
  卫星通信c频段常温低噪声放大器模块通用规范
• Dielectric resonator ( dr ) is often used to stabilize the frequency of an oscillator
  用介质谐振器设计振荡器( dro )也是微波频段常用的一种频率合成技术。
• The isolation of the reader is increased for more than 30db by several experiments
  经实际测试表明，在系统工作频段上，将阅读器的收发隔离度提高了30db 。
• Second , the possible operation frequency bands are studied for groundwave marine communication system
  对海上地波通信系统可利用的工作频段进行了系统研究。
• The design mainly consists of a slit patch to achieve the antenna size reduction and multi - band operation
  这个天线通过一个缩减天线尺寸的裂缝取得三频段工作。
• 2 . finline - to - microstrip transitions are designed and used in the power - driver at ka - band
  2 .设计了ka频段鳍线-微带的过渡,并将其运用于功率驱动级放大器之中。
• It will also be necessary to free up radio spectrum now used for military and satellite communications
  同样地，也有必要开放目前用于军事和卫星通讯的无线电频段。
• Light visible to human eyes however occupies only a very narrow band in the whole electromagnetic spectrum
  然而，人眼可见的光在整个光谱中只占一个非常狭窄的频段。
• Aeronautical mobile satellite services communications ground earth station - general technical requirements c l band
  航空移动业务卫星通信地面地球站总技术要求c l频段
• So , the subtraction parameter will increase and will destroy the speech information of this frequency band
  这样得到的减参数在很大程度上破坏了2khz ~ 4khz频段语音信息。