# Antennas

### Explanation of question 17

An appropriate length for the reflector of a 433MHz Yagi antenna will be approximately

1. 173mm
2. 300mm
3. 346mm
4. 700mm

The answer is :- 3 = f(MHz) = = 0.33 m = 330mm The reflector is normally 5% larger, i.e. 330 x 1.05 = 346mm

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