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楼主 |
发表于 2005-9-29 10:54:00
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网速太慢,传不上来
今天我机子网速慢,上传不了,我觉得讲座内容通俗易懂,只是很多图片今天传不了,下次网络好了再传
Importance of RF circuit design
– wireless communications (explosive growth of
cell phones)
– global positioning systems (GPS)
– computer engineering (bus systems, CPU,
peripherals exceeding 600 MHz)
• Why this course???
– lumped circuit representation no longer applies!
Frequency spectrum
• RadioFrequency (RF)
– TV, wireless phones, GPS
– 300 MHz … 3 GHz operational frequency
– 1 m … 10 cm wavelength in air
• MicroWave (MW)
– RADAR, remote sensing
– 8 GHz … 40 GHz operational frequency
– 3.75 cm …7.5 mm wavelength in air |
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