The one that I posted in the OP is intended for someone,.. say, someone like my shop that is surrounded by a bunch of trees that block line of sight. The forager does just what is the name suggests, it forages whatever scattered signals are bouncing around within the area and attempts to gather and buffer the information together within the aperture. No great raw gain is required for the purpose of this signal scavenger.
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This sketch relates to post #6. This is the one that performs equal or better than the CM4221.