There is far more to the shielding within the M3 antenna than most people realize. The STi emits no radiation which can be detected more than a foot or so away from it. Here is the patent:
Radar detector with reduced emissions
The local oscillators are conventional LOs. Its the design and shielding that makes the STi stealth. And the patent covers virtually every aspect of the technology required to produce a completely stealth radar detector, so I wouldn't look for Valentine to be producing a similar product -- ever.
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