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無線電 ,[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],AM 訊號在示波器上
現代數位化電腦式無線電發報機 美國早期的收音機廣告
無線電的用途   ,[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],軍用手持無線電通話器
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],警車用無線電
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],無線電天文望遠鏡
電磁波譜 ←  波長越短       波長越長 -> ← 頻率越高       頻率越低 -> 伽馬射線   · X 射線   ·  紫外線   ·  可見光   ·  紅外線   ·  太赫茲輻射   ·  微波   ·  無線電波 可見光 紅    ·   橙    ·   黃    ·   綠    ·   藍    ·   靛    ·   紫 微波 W 波段   ·  V 波段   ·  Q 波段   ·  Ka 波段   ·  K 波段   ·  Ku 波段    ·  X 波段    ·  S 波段    ·  C 波段    ·  L 波段 無線電波 極高頻 (EHF)   ·   超高頻 (SHF)   ·   特高頻 (UHF)   ·   甚高頻 (VHF)   ·   高頻 (HF)   ·   中頻 (MF)   ·   低頻 (LF)   ·   甚低頻 (VLF)   ·   特低頻 (ULF)   ·   超低頻 (SLF)   ·   極低頻 (ELF) 波長 微波    ·   短波    ·   中波    ·   長波
 
 
ITU 制定的 12 個波段 波段 頻率範圍 用途 未定義 3 ~ 30 Hz 至低頻  (ELF) 30 ~ 300 Hz 音頻  (VF) 300 ~ 3000 Hz 低音頻  (VLF) 3 ~ 30 KHz 極長距離點對點通訊、航海通訊 低頻  (LF) 30 ~ 300 KHz 極長距離點對點通訊、航海通訊 中頻  (MF) 300 ~ 3000 KHz 航空通訊、中波廣播、無線電定位 高頻  (HF) 3 ~ 30 MHz 長距離通訊、民用無線電、短波廣播、航空通訊 特高頻  (VHF) 30 ~ 300 MHz 中距離通訊、雷達、調頻廣播、呼叫器、電視通訊 超高頻  (UHF) 300 ~ 3000 MHz 短距離通訊、電視、衛星通訊、計程車無線電通訊、行動電話、無線電話 極高頻  (SHF)  與至高頻  (EHF) 3 ~ 300 GHz 微波中繼、雷達、衛星通訊 未定義 300 ~ 3000 GHz
國內的波段分配情況 用途 波段 行動電話 160 、 280 MHz 呼叫器 160 、 280HMz 數位低功率無線電話 866MHz 業餘無線電 1.8 ~ 1.9 、 7 ~ 7.1 、 10.13 ~ 10.15 、 14 ~ 14.35 、 21 ~ 21.45 、 28 ~ 29.7 、 144 ~ 146 、 430 ~ 432 、 1260 ~ 1265 、 2440 ~ 2450MHz 民用無線電對講機 27MHz 有線電話無限主副機 1.6 、 46 、 49 、 1900MHz 警察通訊 4 、 5 、 140 、 150 、 160 、 170 、 480 、 490 、 500 、 900 、 2700MHz 計程車無線電通訊 4 、 5 、 140 、 150 、 160 、 170 、 480 、 490 、 500 、 900 、 2700 MHz 一般用途無線遙控 13 、 27 、 40 、 72 、 75 、 400 、 480 MHz 、 2.4 、 5.8 、 24GHz 山難救助 148 MHz
謝謝大家~

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無線電

  • 1.
  • 2.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9.
  • 10.
  • 11. 電磁波譜 ←  波長越短       波長越長 -> ← 頻率越高       頻率越低 -> 伽馬射線   · X 射線   · 紫外線   · 可見光   · 紅外線   · 太赫茲輻射   · 微波   · 無線電波 可見光 紅   · 橙   · 黃   · 綠   · 藍   · 靛   · 紫 微波 W 波段   · V 波段   · Q 波段   · Ka 波段   · K 波段   · Ku 波段   · X 波段   · S 波段   · C 波段   · L 波段 無線電波 極高頻 (EHF)  · 超高頻 (SHF)  · 特高頻 (UHF)  · 甚高頻 (VHF)  · 高頻 (HF)  · 中頻 (MF)  · 低頻 (LF)  · 甚低頻 (VLF)  · 特低頻 (ULF)  · 超低頻 (SLF)  · 極低頻 (ELF) 波長 微波   · 短波   · 中波   · 長波
  • 12.  
  • 13.  
  • 14. ITU 制定的 12 個波段 波段 頻率範圍 用途 未定義 3 ~ 30 Hz 至低頻 (ELF) 30 ~ 300 Hz 音頻 (VF) 300 ~ 3000 Hz 低音頻 (VLF) 3 ~ 30 KHz 極長距離點對點通訊、航海通訊 低頻 (LF) 30 ~ 300 KHz 極長距離點對點通訊、航海通訊 中頻 (MF) 300 ~ 3000 KHz 航空通訊、中波廣播、無線電定位 高頻 (HF) 3 ~ 30 MHz 長距離通訊、民用無線電、短波廣播、航空通訊 特高頻 (VHF) 30 ~ 300 MHz 中距離通訊、雷達、調頻廣播、呼叫器、電視通訊 超高頻 (UHF) 300 ~ 3000 MHz 短距離通訊、電視、衛星通訊、計程車無線電通訊、行動電話、無線電話 極高頻 (SHF) 與至高頻 (EHF) 3 ~ 300 GHz 微波中繼、雷達、衛星通訊 未定義 300 ~ 3000 GHz
  • 15. 國內的波段分配情況 用途 波段 行動電話 160 、 280 MHz 呼叫器 160 、 280HMz 數位低功率無線電話 866MHz 業餘無線電 1.8 ~ 1.9 、 7 ~ 7.1 、 10.13 ~ 10.15 、 14 ~ 14.35 、 21 ~ 21.45 、 28 ~ 29.7 、 144 ~ 146 、 430 ~ 432 、 1260 ~ 1265 、 2440 ~ 2450MHz 民用無線電對講機 27MHz 有線電話無限主副機 1.6 、 46 、 49 、 1900MHz 警察通訊 4 、 5 、 140 、 150 、 160 、 170 、 480 、 490 、 500 、 900 、 2700MHz 計程車無線電通訊 4 、 5 、 140 、 150 、 160 、 170 、 480 、 490 、 500 、 900 、 2700 MHz 一般用途無線遙控 13 、 27 、 40 、 72 、 75 、 400 、 480 MHz 、 2.4 、 5.8 、 24GHz 山難救助 148 MHz