Transmission media (A-level only) (3.13.6.2) | AQA A-level Physics (7408) | KnowledgeSet

Transmission media (A-level only)

Physics · A-Level · AQA · AQA A-level Physics (7408) · Specification point · 3.13.6.2 · Electronics (A-level only) · Data communication systems (A-level only)

Transmission media comparison

Ground-wave propagation

Sky-wave propagation

Satellite communication links

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Learning Objectives

3.13.6.2 Transmission media (A-level only)

Content
$Transmission-path media: metal wire, optic fibre, electromagnetic (radio, microwave). Ground wave, refraction and reflection of sky waves, diffraction of long-wavelength radiation around the Earth’s surface. Satellite systems and typical transmission frequencies. Students should recognise that up- and down-links require different frequencies so that the receivers are not de-sensed. Advantages and disadvantages of various transmission media. Students should consider data transmission rate, cost, and security issues.$

Content

Transmission-path media: metal wire, optic fibre, electromagnetic (radio, microwave). Ground wave, refraction and reflection of sky waves, diffraction of long-wavelength radiation around the Earth’s surface. Satellite systems and typical transmission frequencies. Students should recognise that up- and down-links require different frequencies so that the receivers are not de-sensed. Advantages and disadvantages of various transmission media. Students should consider data transmission rate, cost, and security issues.