You have tried other similar products like this too boost your network and didn't work very well for you? or it's your 1st time of seeing this type of device?
here is your solution... take a look at the image of what i uploaded once again, you will see 360° omnidirectional outdoor antenna... it consists of 18dbi and that's the highest in the market at the moment. it pools network from every direction on like the other one you will have to search for the direction of the grid.
it might be a little bit more expensive than others you see around, but i bet you... it's the best network booster set you will ever see around at the moment.