I am working on a project where we have decided to use radar to measure the distance of an object from the device.
I have been using Infineon's BGT24MTR11 (24GHz) evaluation board, (Sense2go), which comes with an integrated patch antenna already onboard.
It will detect movement approximately 5m from the board.
However, we need to accurately measure the distance of objects approximately 100m from the transmitter and have a required detection radius of 10°.
There are issues around 24GHz, (temporary band, astronomy stations, etc.), so we may actually move to 77GHz or 79GHz but for the moment I am sticking with 24GHz.
edit As kindly pointed out by Brian Drummond the sense2go module will not measure 100m, so the 24GHz is not an option and sense2go is off the list .
The regulatory body ETSI, lists only three automotive radar frequencies, 24, 77 & 79GHz, http://www.etsi.org/technologies-clusters/technologies/intelligent-transport/automotive-radar. 77GHz seems to be the most popular.
The next evaluation board on our list comes from Altera This has a centre frequency around 77GHz. I tried contacting the supplier of the demo antenna but they did not get back and the feedback I have been getting is that unless you are tier 1 or a major OEM they won't talk to you.
I have been looking in vain for commercially available antennas that will work at these frequencies.
Something like Delphi's system would be ideal.
I am considering designing the antenna using cst, however I have limited experience in antenna design and there are no antenna design experts on the team.
Can anyone make a recommendation for a best course of action (77GHz)?