Disguise for BTS Mobile Phone Antennae

I was thinking how nice it would be if the BTS Antennae left outside could be covered with some kind of disguise to make them more harmonious with the surrounding and less sticking out so that would be more acceptable by people who live around these and always complain about their existence. This disguise could be a cover that is permeable to the waves so that it would not interfere with the workings of the antennae.