Window reflection ?

My first STIR+ I used a suction cup mount bracket. So the Stir+ antenna face was approx 1/2-1" away from the window. And it was scary reactive in this position. I have since decided to go with a blend mount. Which positions the rd under the mirror placing the face of the unit about 6-7" from the window. It doesnt seem to have the range in close ka i/o or qt shots as when i had the face almost against the window. Any redline guys know what im talking about?

*dont get me wrong it saved my bacon over the weekend 2x :)
its just that it seems a bit different since i have it in the new mount.

Window tint

There is no window tint. Im thinking its the actual radius of the window. When you pull back the rd the window is like a Fresnel Lens. Creating a distortion like a magnifying glass. But when the rd is up close the Fresnel Lens affect is very minimal. Just a theory.

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Originally Posted by ExoticRadar

There is no window tint. Im thinking its the actual radius of the window. When you pull back the rd the window is like a Fresnel Lens. Creating a distortion like a magnifying glass. But when the rd is up close the Fresnel Lens affect is very minimal. Just a theory.

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My off axis certainly dropped using supercup.

Radar Manufacturers recommend that their antennas be placed as close to the windshield as possible for best performance.;)

This is one of the dynamics that I thought effected the 2009 GOL test of off axis performance. Their modified swivel mount put detectors well back from the windshield which is not the normal mounting position......and the windshield will in fact work as a lense in front of the antenna.

Even though glass (like plastic) is a low loss medium, it still represents a barrier to which microwaves must pass through. Actually, it does three things.......it reflects part of the energy, it refracts part of the energy (changes direction) and it induces a phase shift on those microwaves that make it through.

Now I'm not smart enough to say WHY pulling the detector back away from the windshield has a negative effect, but I believe it does. Obviously one possible reason is you have a smaller patch of glass between the detector and source signal when it's butted up against the glass?

A few Years ago a forum member posted a video. He was outside a supermarket using I think a false K ban. He placed some plastic in front of the radar horn which in turn cut the alert by 1 or 2 bars at the time he gave a run down on why. I'm crap at searching the forum for old post but I know it's somewhere about.

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Originally Posted by ghz1

A few Years ago a forum member posted a video. He was outside a supermarket using I think a false K ban. He placed some plastic in front of the radar horn which in turn cut the alert by 1 or 2 bars at the time he gave a run down on why. I'm crap at searching the forum for old post but I know it's somewhere about.

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That video was made by Mem-Tek, and it's no longer there.

Someone posted on here a long time ago that the SuperCup mount made his detector lose off-axis detection.

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Originally Posted by nine_c1

My off axis certainly dropped using supercup.

Radar Manufacturers recommend that their antennas be placed as close to the windshield as possible for best performance.;)

This is one of the dynamics that I thought effected the 2009 GOL test of off axis performance. Their modified swivel mount put detectors well back from the windshield which is not the normal mounting position......and the windshield will in fact work as a lense in front of the antenna.

Even though glass (like plastic) is a low loss medium, it still represents a barrier to which microwaves must pass through. Actually, it does three things.......it reflects part of the energy, it refracts part of the energy (changes direction) and it induces a phase shift on those microwaves that make it through.

Now I'm not smart enough to say WHY pulling the detector back away from the windshield has a negative effect, but I believe it does. Obviously one possible reason is you have a smaller patch of glass between the detector and source signal when it's butted up against the glass?

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Very good to know! I've always wondered if the glass/distance from windshield affects performance.

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Originally Posted by Weeth

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Originally Posted by nine_c1

My off axis certainly dropped using supercup.

Radar Manufacturers recommend that their antennas be placed as close to the windshield as possible for best performance.;)

This is one of the dynamics that I thought effected the 2009 GOL test of off axis performance. Their modified swivel mount put detectors well back from the windshield which is not the normal mounting position......and the windshield will in fact work as a lense in front of the antenna.

Even though glass (like plastic) is a low loss medium, it still represents a barrier to which microwaves must pass through. Actually, it does three things.......it reflects part of the energy, it refracts part of the energy (changes direction) and it induces a phase shift on those microwaves that make it through.

Now I'm not smart enough to say WHY pulling the detector back away from the windshield has a negative effect, but I believe it does. Obviously one possible reason is you have a smaller patch of glass between the detector and source signal when it's butted up against the glass?

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Very good to know! I've always wondered if the glass/distance from windshield affects performance.

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X2, never would have thought it made a significant difference being pulled off the window some

Good to know. Guess it's time to pull the V1 off the visor and get it up on the windshield.

It now makes me wonder if using a supercup has made my escort worse off. I think some testing is in order.

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Originally Posted by Sector_15504

It now makes me wonder if using a supercup has made my escort worse off. I think some testing is in order.

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Maybe or maybe not ~ it depends on the radius of your window. With my curved window it has made a difference. Ill be fabricating a custom bracket that will extend my stir+ face within a 1/2" of the window.