P5e concept map
- Created by: Theex
- Created on: 26-04-14 13:55
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- P5e concept map
- Microwaves
- They undergo very little diffraction
- This means...
- So they can pass through the ionosphere
- They have very short wavelengths
- So
- They undergo very little diffraction
- This means...
- So they can pass through the ionosphere
- They undergo very little diffraction
- So
- The transmitter and reciever must be in line of sight/ carefully aligned
- They undergo very little diffraction
- Short wavelength radio waves
- They have very short wavelengths
- So
- So
- So the communication dish needs to be much larger
- Frequencies above 30GHz are weakened by rain and dust due to absorption and scattering
- They're wavelength is larger than microwaves though
- So the communication dish needs to be much larger
- They have very short wavelengths
- Medium wavelength radio waves
- Frequency lower than 30MHz
- Due to longer wavelength
- Reflect from the ionosphere back to Earth
- Long wavelength radio waves
- Due to longer wavelength
- Reflect from the ionosphere back to Earth
- Undergo lots of diffraction and bend around Earth
- The receiving dish is large and curved to focus and maximise collection of signal
- The receiving dish is large and curved to focus and maximise collection of signal
- Due to longer wavelength
- Microwaves
- The transmitter and reciever must be in line of sight/ carefully aligned
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