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Bluetooth™: Connect Without Cables by Charles F. Sturman, Jennifer Bray

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2 Antennas

The antenna transmits and receives the radio waves which Bluetooth wireless technology uses to communicate, so it is a crucial part of any Bluetooth implementation. At their crudest, 2.4 GHz antennas can be simple lengths of wire, but for the best performance and to fit well with a product’s form factor, more sophisticated antenna designs are required.

When choosing and positioning antennas, the surrounding environment has to be taken into account, as this can have marked effects on antenna performance.

2.1 Radiation Pattern

Antenna radiation patterns are usually plotted in two dimensions: azimuth and elevation. The azimuth pattern is the pattern of radiation looking down on the antenna from above. The elevation pattern is the pattern ...

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