Since X band is essentially dead in the U.S., and since K band is becoming a less significant threat every year, do you think that radar detector manufacturers should start designing their radar horns to be optimized for Ka band yet still providing fair detection on K band?
The reason I ask this question is that currently most radar detector horn designs use a major axis which is 1.1 inches in width -- the same wavelength as X band radar. The obvious problem is that phase canceling issues occur for different Ka band radar frequencies. Obviously this could be greatly minimized if radar detector manufacturers would switch to designing radar horns which are optimized for the middle of the Ka band frequency. Such a design would still produce adequate performance for K band, but X band performance would be quite variable depending on the specific Ka optimized horn design.
Anyway, it seems to me that the radar detector manufacturers are doing a mediocre job of anticipating the future radar world when they start to design a radar detector which won't see production until at least two years in the future. This is just a thought, but a properly optimized Ka radar horn would likely experience far less off-axis detection problems like those shown in GOL's off-axis tests.
Think about it. If radar horns were designed with a 1.36 inch width (4X the mid Ka wavelength) instead of a 1.2 inch width (1X the X wavelength), then the horns could be designed to also minimize off-axis phase canceling for Ka band radar, improving Ka off-axis sensitivity.
Well, it is just a half crazy thought of mine. Any comments?