無線觀念 ° § N 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 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……