资料介绍
無線觀念
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RF gW§N
Radio Frequency - v jerry@cs.nthu.edu.tw
2004/3/17
C. Y. Chen
Ch03-1
K-n
° RF °ò[ ° §N ° iW§N
2004/3/17
C. Y. Chen
Ch03-2
RF °ò[-1
° ° ° ° qit×Oút Wv±q 300Hz(i 1M¤¤)¨ì3*10 20Hz(10-12¤¤ ) §CW => ¤q°T Microwave 1G ~ 40GHz °W => tzgu Millimeter wave > 40GHz
RF < 1GHz
FCC Regulated
1Mm 300Hz
10km 30kHz
100m 3MHz
1m 10mm 300MHz 30GHz
100um 3THz
1um 300THz
VLF
LF MF HF VHF UHF SHF EHF
IR
VL
UV
submarine
2004/3/17
Radio
TV
C. Y. Chen
GSM
VL: Visible Light
Ch03-3
RF °ò[-2
° Pq°TW W±a L-Band B-Band C-Band X-Band Ku-Band
2004/3/17
Wvdò 1.0 ~ 2.0 GHz 2.0 ~ 4.0 GHz 4.0 ~ 8.0 GHz 8.0 ~ 12.0 GHz 12.0 ~ 18.0 GHz
C. Y. Chen Ch03-4
802.11b , 802.11g ISM band 802.11a
RF °ò[-3
° íqyHy§b÷é§t¨ A qu Pòùò¤°±¤ A N| qi C ° qib¤¤iNOqP A Hyqye]¨ì qi A ±óOi-n±é
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