射頻(RF)跟微波有何不同？

Question

常常在資訊刊物上看到射頻和微波兩個名詞
請問一下這兩個名詞是不一樣的東西嗎？他們的運作原理為何？
煩請知識達人解答，謝謝！

再問一下那兩種電磁波在本質及功能上有何不同？為何要有不同的名詞？

Answer 1

只是頻率不同的電磁波,而且有重疊請看表1與表2表1.Microwave frequency bandsDesignationFrequency rangeL band1 to 2 GHzS band2 to 4 GHzC band4 to 8 GHzX band8 to 12 GHzKu band12 to 18 GHzK band18 to 26.5 GHzKa band26.5 to 40 GHzQ band30 to 50 GHzU band40 to 60 GHzV band50 to 75 GHzE band60 to 90 GHzW band75 to 110 GHzF band90 to 140 GHzD band110 to 170 GHz表2.Radio frequency spectrumBand nameAbbrITU bandFrequencyWavelengthExample uses< 3 Hz> 100,000 kmExtremely low frequencyELF13–30 Hz100,000 km – 10,000 kmSuper low frequencySLF230–300 Hz10,000 km – 1000 kmCommunication with submarinesUltra low frequencyULF3300–3000 Hz1000 km – 100 kmVery low frequencyVLF43–30 kHz100 km – 10 kmSubmarine communication, avalanche beacons, wireless heart rate monitorsLow frequencyLF530–300 kHz10 km – 1 kmNavigation, time signals, AM longwave broadcastingMedium frequencyMF6300–3000 kHz1 km – 100 mAM (Medium-wave) broadcastsHigh frequencyHF73–30 MHz100 m – 10 mShortwave broadcasts and amateur radioVery high frequencyVHF830–300 MHz10 m – 1 mFM and television broadcastsUltra high frequencyUHF9300–3000 MHz1 m – 100 mmtelevision broadcasts, mobile phones, wireless LAN, ground-to-air and air-to-air communicationsSuper high frequencySHF103–30 GHz100 mm – 10 mmmicrowave devices, mobile phones (W-CDMA), WLAN, most modern RadarsExtremely high frequencyEHF1130–300 GHz10 mm – 1 mmRadio astronomy, high-speed microwave radio relayAbove 300 GHz< 1 mmnone yet, but see terahertz radiation

2006-03-02 09:35:49 補充：
就跟單位有公制英制不同,無線電的頻寬定義也是百家爭鳴.
表1. 是英國的Radio Society of Great Britain (RSGB)所訂定的, 表2是國際電信聯盟International Telecommunication Union (ITU)訂定的.其他還有美國的IEEE定義,歐洲的EU定義,真的是蠻亂的.