With antennas, they are usually 1/4 of the wavelength in play so they don't scale with decoder size. However, the 1/4 wavelength can be achieved with a helical coil format (e.g. the short stubby antenna on police/business/amateur VHF/UHF radios). Some nRF modules use a spiral of copper on the pcb to avoid the soldered wire antenna. The problem with helical and spiral antennas is that they tend to be more direction sensitive, leading to reduced effective operating range.With this smaller chip, smaller components, achieving the same as the older larger chips, why does the antenna remain the same size?
Are there no substitutes for smaller antennas?