[SOLVED] What is the main difference between a 5GHz antenna and a 2.4GHz antenna?

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What is the main difference between a 5GHz antenna and a 2.4GHz antenna?

Is it the winding or material? Is there anything I can make which would work with any frequency?
 

If you think of separate antennas:

For 5 GHz, wavelength is smaller and the antenna is a scaled-down (smaller) version of the 2.4GHz antenna.
 
Depends on the antenna type. 2.4 + 5 GHz is often designed as dual band antenna, e.g. for WiFi. Wideband antenna is more complicated, it will have considerably larger size, e.g. log.per. dipole.
 
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