433 MHz starts with an electrical-size problemFree-space wavelength gives context for product volume. Meanders, helices and loading change currents, stored energy and losses; they need their own installed validation.433 MHz starts with an electrical-size problemQuarter wavelength is a scale comparison, not the printed trace length.Free-space λ/4 at 433 MHz ≈ 173.1 mmAvailable PCB edge?Loading changes QA smaller physical path does not preserve the same bandwidth or efficiency.³Ô¹Ïtv engineering illustration · conceptual, not to scale · no measured product data