for those frequencies it's better (and way smaller and effective) to use what is known as a Yagi antenna.
https://en.m.wikipedia.org/wiki/Log-periodic_antenna
I'd start to use parabolic antennas around and higher than 10GHz...
Discussion
A Log-periodic antenna for a larger range of frequency.
basically stacked Yagi antennas.
An antenna will have a higher gain (sense of directivity and effectivity in gain of signal) if the range of frequencies is not large and thus the antenna is specified for a specific purpose.
Some say they achieve some gain (directivity) by using a wok in combination with their wifi-dongle. That would be the really cheapass solution