"AM reception in EVs is a feat of engineering."Why? It not ought to be if you know what you are doing!
It seems a great shame that universities don't teach electromagnetic shielding and screening in digital electronics, or if they do they only gloss over it. Once it was a core subject and everyone understood its importance. Moreover, the failure to teach EMR shielding techniques in 101 electrical engineering has been an ongoing saga for decades, it's why digital people end up with little or no concept of the issues that confront engineering in the small-signal analog world.
This lack of training and the failure to emphasize the importance of proper spectrum management, which, in short, is the science of using RF frequencies efficiently without causing interference, is the principal reason why digital people don't seem to give a damn about the RF/EMR pollution and noise emitted from their switching circuits. Now opportunistic EV manufactures have the damned hide to try to sweep away the last vestiges of prudent spectrum management.
Fact: if you cannot listen to a normal broadcast AM radio transmission within its authorized service area on a car radio then the EV's electronics is polluting and radiating noise beyond normal acceptable limits. QED.
One sees crappy almost non-existent shielding everywhere from domestic electronics through to huge Tesla coils that completely block out swathes of radio spectrum for many tens of kilometres. Under ITU and national spectrum management laws such behavior is supposed to unlawful but no one including the FCC does anything of consequence about it (once if you emitted radio noise you'd soon find radio inspectors clambering all over your equipment with RF noise detectors).
Over the past 40 or so years the electromagnetic spectrum, especially HF frequencies, has, in parts, become almost unworkable because of crappy noise from digital electronics and the principal polluters are those in the digital electronics world. Let's be clear what we are talking about here: they are polluters and it's pollution like any other green issue—think of oil spills, chemical residues, nuclear waste, now add to that list electromagnetic pollution.
About 20 years back NATO did a report that indicated the background noise floor on the HF spectrum had been raised by about 6 to 8dB because of unwanted electrical noise. Several years back at a SMPTE engineering exhibition I quoted this figure to the chief engineer of a manufacturer of HF transmitters and he looked at me with surprise and asked where had I been in recent years, he then informed me that the then current noise figure had risen to about 17dB!
That level of EMR pollution is outrageous, it's clear that parts of the RF electromagnetic spectrum are already unusable.
Imagine how bad the EMR pollination will be if these bastard EV manufactures get their way and when there are millions of EVs on the road without adequate EMR suppression. Not only will all long wave, AM and HF bands be unusable but so too will large sections of the VHF band.
For those who don't understand the problem let me put it into perspective. These EMR shielding problems were solved in the 1930s when aircraft used HF radio (≈3-30MHz). Aircraft HF radio receivers have to be about an order of magnitude more sensitive than normal domestic AM radios because the incoming signals are so much weaker. That didn't deter RF engineers of the day, now all aircraft electronics are properly shielded.
So what's wrong with the EV engineers? It seems to me it's a combination of cost-cutting and ignorance.
This law must succeed!
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A few basic references for the untrained:
MIT Radiation Laboratory Series vol 23 - Microwave Receivers, Ed: S.N. Van Voorhis, 1948.
Noise Reduction Techniques in Electronic Systems, Ott, Henry. W, 1976, Wiley.