Why did Ka come onto the scene?

Boozehound

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Ka has a narrower cone. Also, when Ka was new the cops probably thought it was slick to have a radar system that millions of existing RDs couldn't detect. In those times Ka was harder to detect even by the new RDs that had the capability.
 

CarefulDriver

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I have understood that frequency has something to do with antenna size. Higher frequency, smaller antenna.
 

Ramsjam12

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Ka has a narrower cone. Also, when Ka was new the cops probably thought it was slick to have a radar system that millions of existing RDs couldn't detect. In those times Ka was harder to detect even by the new RDs that had the capability.
With the % of people using RD I’m surprised they cared that much
 

smokinu454

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I think ka does a little better with longer range highway performance, also as mentioned above, the antennas are smaller.
 

Bloovy One

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Some of Ka was originally (from our perspective) Photo-Ka.

Radar detectors were a bigger business in the 80's and early 90's.
 
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nomore55

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I thought it was initially being sold as "un-detectable" by the average radar detector of the day ....
 

Boozehound

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With the % of people using RD I’m surprised they cared that much
There were many more people using RDs back in the late '80s/early '90s. @CarefulDriver is correct- Ka band's higher frequency allowed for substantially smaller antennas. Stalker Ka has greater range and much better same lane performance that the old Kustom K bands that were capable of same lane.
 

jon5

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I have understood that frequency has something to do with antenna size. Higher frequency, smaller antenna.
Just to expand on this a little...

Frequency is directly correlated to Wavelength. Lower frequencry, longer wave. Longer wave, longer antennae.

Another way to look at this... waves don't "fit" well in anything smaller than their wavelength. It would kind of be like trying to use pin-art on a microbe.
This is how blu-ray worked. The blue/violet laser has a shorter wavelength (405nm), allowing it to see smaller divots on the disk. A red laser is incapable of perceiving those divots.
 

LouG

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We had a couple of minor traffic depts using mobile K, when they were absorbed into Police the whole shebang went to Ka stalkers. They were touted as undetectable, so I went to V1. Such is the way of threat and countermeasure.
 

Transwarp

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Ka was the next best thing, so as the K units began to age, they were sold smaller units with better electronics. Undetectable was just a bonus.

I recall for YEARS past the NYSP going 100% ka Stalkers seeing OG Passports and Escorts on people's dashboards, not to mention lower tier stuff that could barely hear K.

Now, I have a Profile on my V1G2 called K BAND OFF, and I'm considering muting the out of box Ka signals, but I need to spend a bit more time observing frequencies...although 34.7 appears to the the main threat near me.
 

RoadDogg

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I recall for YEARS past the NYSP going 100% ka Stalkers seeing OG Passports and Escorts on people's dashboards

I remember seeing a lot of of people using X/K band only radar detectors after Ka had been in use.

I (unfortunately) received a ticket in this scenario using an Escort DSP in the 1990’s while my V1 was at Valentine Research being serviced for some reason. I came around a curve in a neighboring city and was nabbed by Ka which my Escort DSP could not detect. I think it was around 1994.

Every time I go that way and around that curve, I remember that traffic stop from overs 25 years ago. I learned a lesson that day, and I was so glad to get my V1 back.


Sent from my iPhone using Tapatalk
 

Deacon

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Ka represents a MASSIVE frequency range, basically 3GHz wide. That means lots of room for different radar manufacturers to take different frequency approaches based on whatever they feel is best, and it made it a bear for detectors to detect—and for a while no detectors were designed to detect it. Plus the antennas were smaller and less intrusive on cabin space and blocked less visibility for the driver. Plus they were the next big thing.
 

LouG

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Our Police rarely mention detectors now. Probably don't want to arouse the curiosity of the great unwashed.
But they used to say Stalkers were undetectable, what they didn't say was undetectable in hold mode.
 

VariableWave

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When the FCC opened the Police radar to Ka band post '83 (upper K band range), it was intended for many things, before widening any further in the 90s. K band being sliced up into 3 categories.... Ku, K and Ka....
Not only did it defeat at that time RDs (adding more scanning radius), it was to open a broader range to operate in... aka channels to open and operate with. There are things it also was to assist, but also had other issues with. One was atmospheric issues that K band itself is plagued with higher moisture in the lower atmosphere reducing potential transmitting range, but also other communications within the range for Federal/Military that operate with. Ka is not immune to these issues, but when closer to the earth, has better operations to work through with lower output and narrower fields (degrees) to have a better selection on target(s).

As you can see with Antenna design to the factor, it is definitely smaller, and if compared to all known three common Antennas, higher is typically smaller. Also, when looking at detection by detectors, typically the lower of the Ka has police is easier to pickup at a wider field and typical distance... but also the detector would also make that factor as well.
 

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