Penetration will not change for better with high gain antenna because in near field it performs worse than the low gain antenna. All the gain of any antenna is attributed solely to the far field sum of all the signal paths from the antenna geometry ... which in case of high gain antenna you don't have when you turn your antenna facing ground.
The most important feature for an antenna you can look forward is broadband coverage because your distance resolution depends upon it. With 1GHz bandwidth you have ~30cm resolution
The most important feature for an antenna you can look forward is broadband coverage because your distance resolution depends upon it. With 1GHz bandwidth you have ~30cm resolution
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