Hi DJ11.... !
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Yes, I realize that I was not on target with the glass roof's.. I had composed 90% of my post before I knew it wasn't going near the question-- but I'd already taken the pictures ....
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For me its rhetorical; Just how Do you place a whip on a car's glass roof?? I have no experience with cars like that, nor do I particular care to. I know some talent'd people who can drill a hole thru such glass- but Ye Gads ! .... why go that route? A car owner like that has higher priorities than roof mount'd antennas....
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There are the thru-the-glass mounts- and effective ground planes can be formed for them- but I am going to assume that all these glass tops contain a tinting metallic colloidal which precludes their use.
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Thru the body trunk mounts work well, if a permanent arrangement is desired. I think an imaginative mind can come up with a number of alternatives to the roof for their antennas with out resorting to the hood.... I'm thinking of how ridiculous that location looks....not to mention what a spouse would say!....
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RF coming thru the rear window? may- maybe not a issue-- remembering the possible effects of glass tinting etc.
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Me?, I have no suggestions... other than to not buy such a car if you want a roof top antenna. An interesting question all the same
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Whose up next to take a shot at it ??
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Cheers !
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...................................CF